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The Tokyo Gas Group's Approach to
Environmental Action
Environmental Protection Guideline
Targets and Results
Results of Efforts in FY2015
Continual Improvement of Environmental
Management System
Measures Taken against Environmental
Risks
Efforts to Prevent Global Warming
Reduction of CO Emissions at Customers'
Sites
Energy Conservation and Reduction of
CO Emissions in Business Activities
Forest Preservation and Greenification
Activities
Toward the Creation of ResourceSaving
Society
Tackling Waste Emissions from Production
Facilities and Construction Work
Action in the Gas Supply Field
Action on Waste at Offices
Tackling Waste Emissions at Customers'
Sites
Activities to Conserve Biodiversity
Action along Our Value Chains
Nagano Tokyo Gas Forest and Other
Measures
2
2
Tokyo Gas Group Business Activities and
Material Balance
Environmental Performance Data (1)
Usage of Energy & Water / Emissions into
the Atmosphere & Water Systems
Environmental Performance Data (2)
Waste
Environmental Accounting
Development and Implementation of Local
Global Warming Action Plans
City Gas CO Emission Factors
Assessment of CO Emission Reduction
due to Reduction of Purchased Electricity
About Third Party Assurance
2
2
Tokyo Gas Group has established an "Environmental Philosophy" and "Environmental Policies" based on
its Management Philosophy and Corporate Action Philosophy. The entire group is working actively to
protect regional and global environments in line with the mid to longterm environmental action targets
detailed in its Environmental Protection Guidelines. In fiscal 2015, designated part of the "step" stage of our
Challenge 2020 Vision, the Environmental Policies and Environmental Protection Guidelines were revised
to assist implementation of our main policies. Biodiversity conservation and compliance with environmental
legislation are nothing new to us, but we will need to understand society's expectations even better than
before and translate them into further improvements if we are to successfully evolve as a total energy
business and drive forward with our globalization. In fiscal 2016, therefore, we added two new items to our
Environmental Policies, namely "5. Biodiversity conservation and sustainable use" and "6. Compliance with
environmental law and fulfillment of social responsibilities." We will be taking groupwide action to put these
policies into effect.
The Tokyo Gas Group will promote more sustainable ways of energy use to contribute to the protection of
regional and global environments as well as to the sustainable development of society.
1. Reduction of the Environmental Impact of Customers' Energy Use Tokyo Gas will actively and continuously attempt to reduce the environmental impact of customers'
energy use by promoting the use of environmentally friendly energy (natural gas) and providing highly
efficient appliances and systems.
2. Reduction of the Total Environmental Impact of Tokyo Gas's BusinessOperations Tokyo Gas will continuously reduce energy intensity and resources used in its business operations
through the implementation of efficient and effective environmental management to contribute to the
realization of a sustainable society. At the same time, we will reduce our business operations' overall
environmental impact by aggressively promoting "green purchasing" and the 3R initiatives (Reduce,
Reuse, and Recycle).
3. Strengthening of Environmental Partnerships with the Local and InternationalCommunities Tokyo Gas will strengthen its environmental partnerships with both the local and international
communities by engaging in a wide variety of programs, such as participation in local environmental
events and technology transfers to developing countries.
4. Promotion of Green Technology R&D Programs Tokyo Gas will promote R&D programs for environmental technologies, including renewable energy,
to protect regional and global environments.
Environmental Philosophy
Environmental Policies
5. Biodiversity Conservation and Sustainable Use Tokyo Gas will recognize the benefits of nature, and will monitor and mitigate the impact of our
business activity on biodiversity, promote sustainable use of resources, and conserve biodiversity in
partnership with local communities in order to ensure the continued enjoyment of those benefits in the
future.
6. Compliance with Environmental Law and Fulfillment of Social Responsibilities Tokyo Gas will comply with environmental laws, ordinances, agreements, and other relevant
standards and regulations, and all employees will practice social responsibility in accordance with
global standards.
Environmental Protection Guidelines
Tokyo Gas formulated its Environmental Protection Guidelines in fiscal 2000 to establish mid and long
term targets for environmental activities in line with its Environmental Philosophy and Environmental
Policies. In fiscal 2005, the scope of these guidelines was expanded to include subsidiaries and affiliates in
pursuit of environmental action in three core areas: global warming countermeasures, promotion of
resource saving, and promotion of green purchasing. In fiscal 2009, three additional core areas were added
with the aim of creating a low carbon, resourcesaving society that coexists with nature: promotion of
biodiversity conservation, promotion of environmental communication, and promotion of environmental
technology development. The guidelines have been revised to reflect changes made to other policies and
guidelines in order to assist the realization of the Challenge 2020 Vision, and we are making a groupwide
effort to put them into practice.
Overview Image of Environmental Protection Guidelines
<Link>Environmental Advantages of Natural Gas
Tokyo Gas Group has established and is working to achieve guideline targets in six fields in order to
contribute to the realization of a low carbon society, the creation of a resource-saving society, and the
development of a society that coexists with nature in line with its Environmental Policies. In fiscal 2015,
we reported on our targets and performance in accordance with the Environmental Protection Guidelines
(2014-2020) revised in fiscal 2014 (fiscal 2012 in the case of the Guidelines for Global Warming
Countermeasures). In fiscal 2016, the guidelines were partially revised, with, for example, the Guidelines
for Global Warming Countermeasures which cover our electric power business being revised to take into
account our entry into the electricity retail market. Regarding the revised Environmental Protection
Guidelines (2016-2020), please see the pdf file below.
Environmental Protection Guidelines (FY2015 Numerical Targets and Results)
Category Environmental ProtectionGuidelines (2014-2020)
FY2015 numerical
targets
FY2015 results
FY2016 numerical
targets
Global warmingcountermeasures
Customers'sites
We aim to reduce COemissions at customers'sites by 8 million tons byfiscal 2020. This will beachieved through ourGroup efforts implementedsince fiscal 2011 topromote the use of naturalgas and to develop anddisseminate gas equipmentand systems that havehigher efficiency and lowerenvironmental load.✽1
Reduce COemissions by 3.40million tons
Reduced COemissions by 3.43million tons
Reduce COemissions by 3.70million tons
Electricpowerbusiness
We aim to achieve a COemission factor of 0.35 kg -CO /kWh by fiscal 2020 forour electric powerbusiness.✽2
CO emissionfactor 0.36
CO emissionfactor 0.357
- SeeEnvironmentalProtectionGuidelines(2016-2020).
Businessactivities
(1) We aim to meet anenergy usage intensitytarget (consumption ofprimary energy per gasproduction unit) of 250GJ/million m at our LNGterminals by fiscal 2020.
Energyusageintensity of 220GJ/millionm
Energyusageintensity of 201GJ/millionm
Energyusageintensity of 215GJ/millionm
(2) We aim to meet a heatsales intensity target(consumption of primaryenergy per heat sales unit)
Heat sales intensity
Heat sales intensity
Heat sales intensity
Environmental Protection Guidelines (FY2015 Numerical Targets andResults)
2
2 2 2
2
2
2 2
3 3 3 3
of 1.19 GJ/GJ at districtheating and cooling centersby fiscal 2020.
1.33GJ/GJ 1.34GJ/GJ 1.33GJ/GJ
(3) We aim to meet anenergy usage reductiontarget (primary energyusage) of 910TJ at ouroffices, etc. by fiscal 2020.
Energyusage 915TJ
Energyusage 887TJ
Energyusage 915TJ
Promotingthewidespreaduse ofrenewableenergy
We are working tocontribute to the realizationof a low carbon societythrough efforts to maximizethe implementation ofrenewable energy. Suchefforts include providingproducts and services thatutilize renewable energy,supplying renewableenergy (including powergeneration businesses),and promoting bothnetworked use of energyand energy usage in certainaspects.
- - -
Promotion ofresource saving
Industrialwaste
(1) Production plants withinour Group will maintainzero emissions (defined asa final disposal rate of lessthan 0.1%) until fiscal 2020through the reduction,reuse, and recycling ofindustrial waste. ✽3, 4
Finaldisposal rate less than0.1%
Finaldisposal rate 1.3%
Finaldisposal rate less than0.1%
(2) We will maintain therecycling rate ofconstruction wasteproduced from businessactivities by our Groupcompanies at 98% or aboveuntil fiscal 2020.
Recyclingrate 98% or above
Recyclingrate 96%
Recyclingrate 98% or above
(3) We will achieve therecycling rate of industrialwaste produced at the sitesof our Group companies to90% or above by fiscal2020. ✽5
Recyclingrate 88% or above
Recyclingrate 85.3%
Recyclingrate 88% or above
Generalwaste
(1) Our Group companieswill work to reduce theamount of general wasteproduced and increase therecycling rate of generalwaste to 75% or above byfiscal 2020 through stricterseparation of waste and thepromotion of recycling.
Recyclingrate 75% or above
Recyclingrate 78%
Recyclingrate 75% or above
(2) We will reduce theamount of copy paper usedby our Group companies by8% relative to the amountused in fiscal 2012 to 132million sheets or less byfiscal 2020. ✽6
Reduction by
1% from previousyear
Increase of 0.9% from previousyear
Reduction by
1% from previousyear
Excavatedsoil
We are working to reduce,reuse, and recycle (3Rs)excavated soil arising fromroadside construction workordered by our companyand its subsidiaries andaffiliates. Through theseefforts, we will maintain theamount of excavated soil at16% or less until fiscal2020.✽7
Reduce excavatedsoil to 16% or less
Reduced excavatedsoil to 22.3%
Reduce excavatedsoil to 16% or less
Promotion of biodiversityconservation
Our Group companies areaware of the importance ofthe benefits born frombiodiversity (ecosystemservice). As such, we workto understand and analyzethe impacts our businessactivities have onbiodiversity, and work toimprove our businessoperations, promotingactivities for biodiversityconservation. Moreover, aspart of our social programs,we are also involved inissues concerningbiodiversity, even in areasthat are not related to ourown business activities.
- -
- SeeEnvironmentalProtectionGuidelines(2016-2020).
Promotion of greenpurchasing
(1) Our Group companieswork in concert with ourbusiness partners towardthe realization of a lowcarbon society by makingefforts toward energyconservation and COreduction in our purchasingactivities.
- - -
(2) Our Group companieswork in concert with ourbusiness partners towardthe realization of a resourcesaving society through ourpurchasing activities, bymaking efforts to promotethe 3Rs (reducing wasteproduced, reusing, and
- - -
2
recycling) for gas meters,gas pipes, paper, and otheritems.
(3) The green purchasingrate for purchases madethrough electronic catalogswill be maintained at 75%or above until fiscal 2020.✽8
Greenpurchasingrate of 75%
Greenpurchasingrate of 80%
Greenpurchasingrate of 75%
Promotion of environmentalcommunication
Tokyo Gas Group workstogether with our customersunder a variety of programsto create the kind of eco-friendly and happy lifestylesthat are desired for asustainable future. (1) We work with localcommunities through ourenvironmental contributionactivities and provideinformation on easy ways toconserve energy, thushelping to realize anenvironmentally friendlylifestyle together with ourcustomers.
- -
- See
EnvironmentalProtectionGuidelines
(2016-2020).
(2) We are communicatingwith stakeholders, includingfuture generations, to helpthem learn about theimportance of energy andthe environment, how theyrelate to each person, andhow the Tokyo Gas Groupcontributes toenvironmental protection.
- -
(3) We are fosteringenvironmentalconsciousness amongTokyo Gas Groupemployees and theirfamilies, and encouragingthem to work towardenvironmental conservationin their offices, homes, andcommunities.
- -
Promotion of environmentaltechnologies development
We will accelerate thedevelopment of innovativeenvironmental technologiesin the fields of fuel cells,renewable energy, and inthe management ofhydrogen and CO , and willpromote the expansion of asmart energy network.
- -
- SeeEnvironmentalProtectionGuidelines(2016-2020).
2
Notes:
Environmental Protection Guidelines (2016-2020) (PDF: 3,061KB)
Framework for Establishing the Guidelines Index
The framework for establishing quantitative indices for the Environmental Protection Guidelines isexplained in the following section.
Guidelines for Global Warming CountermeasuresIn our city gas business, the amount of CO emissions at customers' sites far exceeds that from ourbusiness operations. Thus, reducing the amount of CO emissions at customers' sites is the utmostimportance, and our targets have been established accordingly.Regarding the CO emissions from our own business operation, our primary goal is to reduce theenergy usage intensity of city gas production at our LNG terminals, which have the highest energyusage. We also reduce absolute emissions from energy usage at our offices, etc. Targets have alsobeen set for reducing CO emission factors and the heat sales intensity of power generation andheating and cooling business.
Guidelines for Promotion of Resource SavingThe gas industry is involved in three waste management fields: industrial waste, general waste, andexcavated soil.In particular, industrial waste is managed by: efforts to achieve zero emissions targets at productionplants of Tokyo Gas Group, and by promoting the 3Rs (Reduce, Reuse, Recycle); and efforts toenhance recycling rate of industrial waste generated from locations other than those productionplants.Under the Guidelines revised in fiscal 2014, we are stepping up such efforts by further dividingindustrial waste from locations other than production plants into that from construction sites and thatfrom offices and other locations.When conducting construction work of gas pipeline, roads and other surfaces must be drilled, whichresults in the generation of excavated soil (soil, asphalt concrete, etc.). Thus, we are involved inefforts to reduce, reuse, and recycle in order to reduce the amount of excavated soil generated.
Guidelines for Promoting Green PurchasingWe strive to reduce our overall environmental burden not only by working to improve our ownoperations to use less energy and produce less waste, but also by helping to reduce theenvironmental burden in upstream activities through the promotion of green purchasing. Among our
Reduction of CO emissions through "Global warming countermeasures at customers' sites" has been calculated in thecategories of cogeneration (including ENE-FARM) installation, enhanced efficiency of gas equipment, fuel switching, anddiffusion of power generation from natural gas power plants. Reduction effects of cogeneration and the increase of powergeneration from natural gas power plants were calculated with a marginal emission factor (0.69kg-CO /kWh, 0.65kg-CO /kWh).
✽1 2
22
The average CO emissions factor for transmitted power of all wholesale electricity, including not only business-use powerpurchased from power plants of our Group, but also that of other companies and markets.
✽2 2
"Production plants" refer to sites that produce city gas and other products, district heating and cooling centers, and powerplants.
✽3
"Zero emission" is defined as a "final disposal rate of less than 0.1%," where the final disposal rate is obtained by dividingthe amount of waste disposed of by landfill per year by the total emissions of industrial waste by production plants per year.However, asbestos and other non-recyclable industrial waste are excluded from the figure for total emissions of industrialwaste by production plants.
✽4
Sites refer to our business locations except for production plants and construction work sites. Construction work on mainand branch supply pipelines, for which orders are placed by Tokyo Gas and received by its subsidiaries and affiliates,produces a large amount of industrial waste, most of which is recycled. This has therefore been excluded from this category.
✽5
Amount of copy paper sheets is calculated based on A4-sized paper.✽6Ratio of actual surplus soil disposed of against baseline when compared to that from conventional construction methods.✽7Subject items consist of all items purchased through electronic catalogs, including office supplies, office furniture, officefixtures, business cards, envelopes, and printed materials (but excluding tools, safety items, laboratory instruments, etc.).Calculation was made based on the purchase amount.
✽8
2
2
2
2
efforts, we are indexing and controlling the green purchasing rate targeting overall purchases fromelectronic catalogs (however, this excludes difficult to acquire eco-friendly items such as tools,safety items, and physics and chemistry equipment).
Global warming countermeasures at customers´ sites ✽1
The reduction in CO emissions at customers' sites amounted to 3.43 million tons thanks to the promotion
of natural gas use and the development and popularization of more efficient and environmentally friendly
gas appliances such as EcoJOES and CGSs. The spread of highefficiency natural gasfired thermal
power generation made an especially significant contribution to reduced emissions, allowing us to achieve
our target.
Global warming countermeasures in our electric power business✽2
The emission factor decreased due to increased power generation by highefficiency power plants from the
previous year, allowing us to attain our target.
In parallel with our entry into the electricity retail business in fiscal 2016, we changed our target for the
electric power business from the wholesale stage to the retail stage in accordance with commitments for
achieving a low carbon society (new framework) and new reporting arrangements under the Act on
Promotion of Global Warming Measures. As our procurement of supplies from the electricity market and
our use of backup electric power purchased from general electric utilities at the retail stage make it
impossible for us to completely control the emission factor, our Guidelines for Global Warming
Countermeasures set a qualitative rather than a quantitative target.
Guidelines for Global Warming Countermeasures (Results of Efforts inFY2015)
2
Reduction of CO Emissions at Customers' Sites2
Global warming countermeasures in our business activities(1) Global warming countermeasures at LNG terminals
(2) Global warming countermeasures in district heating and cooling centers
CO Emission Factor in the Electric Power Business2
Despite higher energy usage intensity due to an increase in gas supply pressure to meet growing gas
demand, we managed to achieve our target by running our facilities more energy efficiently
Energy Usage Intensity at LNG Terminals
Although efficiency improvements were made to our facilities, we were unable to meet our target due to theapproximately sixmonth shutdown of largescale district heating and cooling centers' cogenerationsystems for improvement work. We will continue to upgrade our facilities and finetune their operation inpursuit of further improvements.
(3) Global warming countermeasures in Tokyo Gas offices, etc.
Promoting the widespread use of renewable energy
We are verifying the effectiveness of using renewable energy through our efforts to create smart energy
networks, as demonstrated at the Senju Smart Energy Network and other projects, and we are applying the
insights gained to other redevelopment projects. The input and injection of biogas derived from food waste
into gas pipelines is taking place as well. In fiscal 2015, we received 675 thousand m of biogas
(amounting to a CO reduction of about 1,150 tons).
We also jointly submitted an environmental impact statement with Fukushima Prefecture on a wind power
generation project in Fukushima, and conducted surveys in preparation for implementing the provisionally
named "Fukushima Coastal Wind Power Generation Initiative."
Heat Sales Intensity for District Heating and Cooling Centers
Energyefficient equipment was installed and energy conservation measures adopted. We achieved ourtarget, aided by an unusually cool summer and mild winter.
Energy Usage at Offices, etc.
3
2
Reduction of CO emissions through "Global warming countermeasures at customers' sites" has been calculated in thecategories of cogeneration (including ENEFARM) installation, enhanced efficiency of gas equipment, fuel switching, anddiffusion of power generation from natural gas power plants. Reduction effects of cogeneration and the increase of powergeneration from natural gas power plants were calculated with a marginal emission factor (0.69kgCO /kWh, 0.65kgCO /kWh).
✽1 2
22
The average CO emissions factor for transmitted power of all wholesale electricity, including not only businessuse powerpurchased from power plants of our Group, but also that of other companies and markets.
✽2 2
Promoting Resource Saving of Industrial Waste(1) Efforts toward zero emissions at production plants✽3
(2) Efforts to recycle construction waste and industrial waste generated at our offices
Efforts to Recycle Construction Waste and Industrial Waste Generated at Our Sites
Promoting Resource Saving of General Waste(1) Efforts to separate and recycle general waste
We recycled 78% of our general waste (including 94.1% of our paper waste) in fiscal 2015, exceeding the
target rate for the year of 75% or over. Alongside more rigorous sorting of waste for recycling, employees
are becoming more aware of the importance of cutting emissions and recycling more. We will continue to
work to maintain and raise the recycling rate for general waste as a whole.
Guidelines for Promoting Resource Saving (Results of Efforts in FY2015)
In fiscal 2015, we worked to increase recycling in order to achieve zero emissions (defined as a final
disposal rate of under 0.1%). As there was still some scope for further resource recycling in some cases,
however, our final disposal rate remained at 1.3%. We will reinforce our collaboration with disposal
contractors as we continue our efforts to reduce the final disposal rate.
Construction waste
In fiscal 2015, we failed to meet our target rate for recycling construction waste due to increased
emissions of nonrecyclable waste. We will continue to work to reduce emissions and increase
recycling.
Industrial waste at our sites ✽4
Although the recycling rate improved slightly in fiscal 2015, we fell short of our target due to an increase
in emissions from the previous fiscal year. We will continue our efforts to reduce the amount generated
and recycle more.
(2) Efforts to reduce usage of copy paper
Our copy paper usage rose 0.9% from the previous fiscal year due to the need to print new standardized
manuals following mergers of subsidiaries and affiliates, and due also to an increase in paperbased work
associated with our sales of electricity. As a result, we were unable to attain our target. We will continue to
practice the 3Rs by replacing paper documents with electronic ones (by, for example, scanning documents,
promoting paperless meetings, and making it easier for employees to keep track of their paper usage).
We will continue to reduce copy paper usage in order to achieve the challenging target set for fiscal 2020.
Promoting Resource Saving of Excavated SoilPromoting the 3Rs for excavated soil from gas pipeline construction
Although the amount that had to be disposed of in fiscal 2015 was kept down to 22.3% relative to the
baseline amount had the 3Rs not been implemented, we fell short of our final target because (a) there were
cases in which excavated soil could not feasibly be reburied, and (b) there was more work performed on
trunk lines in fiscal 2015, which produces considerably more excavated soil than work on ordinary gas
pipelines. We will continue to pursue the reduction of excavated soil by means of the shallowlaying of
pipes in narrow trenches and nonopencut construction methods. We will also continue our efforts to
obtain approval from and negotiate a relaxation of conditions with authorities that have not yet approved
reburial of excavated soil and the use of improved soil and recycled road surface materials in order to
further reduce the amount of soil excavated in gas pipeline construction works.
General Waste Generation and Recycling Rate
Copy Paper Usage and Reduction Rate ✽5
Making efforts at every stage, from natural gas procurement and production to distribution andmaintenance at customers´ sites
We are working to protect biodiversity throughout the Group's value chain.
At the LNG procurement and transportation stages, followup surveys were made of the measuresbeing taken to protect biodiversity at gas fields, confirming that there were no particular problems at the15 projects surveyed (including those under construction or development). We are also continuing tocontrol ballast water during transportation of LNG in vessels owned or managed by Tokyo Gas.At the production and supply stages, the biodiversity of green spaces at our three LNG terminals wassurveyed. Additional surveys were conducted taking into consideration areawide linkages betweenvarious environmental factors, and the results will be used to assist management of green space in thefuture. The impact of gas pipeline laying work on ecosystems caused by use of pit sand was reduced byreducing, reusing, and recycling (i.e., the 3Rs) excavated soil.With regard to initiatives at customers' sites, we have incorporated biodiversity into our environmentalcommunication activities, including the Watashi no Mori Project ("My Forest") to develop mini forests athousing complexes, and the Donguri (Acorn) Project being undertaken by our Gas Science Museum.We also continued our forest conservation activities and conducted biodiversity surveys at the NaganoTokyo Gas Forest, and provided support to NPOs and other groups through the Tokyo GasEnvironmental Support Fund.
Contributing to the realization of a low carbon society through purchasing activities conductedin concert with our business partners
Efforts in FY2015
We continued our efforts to reduce delivery distances through batch delivery of construction materials.
Contributing to the realization of a resourcesaving society through purchasing activities
Ratio of Actual Surplus Soil Disposed of Against Baseline in Gas Pipeline Construction ✽6
"Production plants" refers to sites that produce city gas and other products, district heating and cooling centers, and powerplants. Waste generation here excludes asbestos and other nonrecyclable industrial waste.
✽3
"Our sites" refers to our business locations except for production plants and construction work sites. Construction work onmain and branch supply pipelines, for which orders are placed by Tokyo Gas and received by its subsidiaries and affiliates,produce a large amount of industrial waste, most of which is recycled. This has therefore been excluded from this category.
✽4
Amount of copy paper sheets is calculated based on A4sized paper.✽5
"Disposal ratio" refers to the rate of actual surplus soil disposed of against baseline.✽6
Guidelines for Promoting Biodiversity Conservation (Results of Effortsin FY2015)
Guidelines for Promoting Green Purchasing (Results of Efforts inFY2015)
Contributing to the realization of a resourcesaving society through purchasing activitiesconducted in concert with our business partners
Efforts in FY2015
553 thousand (46%) of the 1,215 thousand meters newly installed were reused, reducing waste by 2,302
tons, while 100% of waste gas pipes were recycled. We are also continuing efforts to recycle waste paper
generated by our company into paper for printing and other uses through the Tokyo Gas Recycled Paper
Program.
Green purchasing rate for purchases through electronic catalogs ✽7
We achieved our target with a green purchasing rate of 80.3%. This was thanks to a combination of
measures, including promoting the placement of environmentally friendly items in electronic catalogs,
system modifications to give priority to environmentally friendly products in searches, and data disclosure
by sector. As of the end of fiscal 2015, 15,165 items had been registered as environmentally friendly.
Environmental Activities at the Local Community Level
We provided information on the Group's activities and suggested ways to save energy in everyday life
through a variety of channels, including by participating in environmental events organized by local
governments, organizing seminars, presentations, and workshops, and publishing information on our
website. We further aided NPOs and other organizations through the Tokyo Gas Environment Support
Fund, passed on environmentally friendly dietary tips through our "ecocooking" program, and contributed
to the creation of community green spaces through the Tokyo Gas Tree Planting Project.
Education on energy and the environment for the next generation
Tokyo Gas employees taught special classes in elementary and junior high schools (434 classes reaching
13,020 pupils). We also assisted the provision of energy and environmental education by teachers (by
providing training for 842 teachers).
We have also allocated a greater role to our Gas Science Museum as a center for energy and
environmental education, and have launched two new field trip courses: one on the environment and one
on energy.
Green Purchasing Rate
Subject items consist of all items purchased through electronic catalogs, including office supplies, office furniture, officefixtures, business cards, envelopes, and printed materials (but excluding tools, safety items, laboratory instruments, etc.).Calculation was made based on the purchase amount.
✽7
Guidelines for Promoting Environmental Communication (Results ofEfforts in FY2015)
Events normally held in Nagano as part of the Donguri (Acorn) Project, an outdoor environmental education
program at Nagano Tokyo Gas Forest, were held instead at our Gas Science Museum due to the eruption
of nearby Mount Asama.
Through all these activities, we helped provide the children upon whom the future depends with enhanced
opportunities to learn about energy and the environment.
Cultivating environmental consciousness among Tokyo Gas Group employees and their families
We provided a range of programs for Tokyo Gas Group employees, including environmental education,
symposiums, and ecodriving courses. In February 2016, we held Environmental Forum 2016 to encourage
employees to think about how they can personally address environmental issues moving forward in light of
COP21. The event was attended by about 500 employees of Tokyo Gas Group.
We also again presented our the Environmental Program Promotion Award to honor the environmental
contributions made by Tokyo Gas Group members and business partners, and continued to run the Tokyo
Gas Tree Planting Project participated in by employees and their families. Through these initiatives, we
have cultivated environmental consciousness among Tokyo Gas Group employees and their families, and
encouraged environmentally friendly practice in the home and in communities.
Development of innovative environmental technologies to contribute to the realization of a lowcarbon society
We realized and brought to market efficiency enhancements and other improvements achieved through
joint development of various cogeneration systems and air conditioners.
Regarding fuel cells, we began demonstration testing of a 5 kWclass solid oxide fuel cell (SOFC) at a
public facility, and we also succeeded in producing the theoretical design for an innovative technique to
raise the power generation efficiency of SOFCs to over 80%.
To promote the adoption of smart energy technologies, we developed a smart energy network in Block II
of the northern district adjacent to Tamachi Station's east exit, and we developed and began marketing
the ENESINFO service for optimally controlling "Smart Multi" commercial gas/electricity airconditioning
systems.
In the hydrogen field, our Senju and Urawa Hydrogen Stations entered commercial operation, and we
joined the NEDObacked research and development project on hydrogen utilization technology to
pursue R&D on hydrogen stations.
Guidelines for Promoting the Development of EnvironmentalTechnologies (Results of Efforts in FY2015)
In order to promote environmental protection activities in line with our Management Philosophy, Corporate
Action Philosophy, Our Code of Conduct, and Environmental Policies, Tokyo Gas has developed and is
operating an environmental management system (EMS) that complies with the ISO 14001:2004
international standard. We ensure that resource and energy conservation and various other activities to
protect the environment are practiced properly and systematically by applying solid PDCA principles, and
these initiatives offer the additional benefit of reducing costs. We plan to be compliant with ISO 14001:2015
from September 2017. We will continue working to raise employees' environmental awareness and ensure
legal compliance by promoting ISOcompliant business practices.
Tokyo Gas Group has introduced EMS, including certification to ISO and EcoAction 21 standards, at
consolidated subsidiaries and affiliates and other group companies that have a major impact on the
environment in order to enhance environmental management throughout the Group. Today 95% of the
Group (in terms of sales) practices environmental management in accordance with ISO 14001 standards.
Looking ahead, we will explore new arrangements for implementing EMS that are suited to individual
Environmental Management System 2016
Efforts of the Group
companies' scales and lines of business as we construct our new group formation, and the Group will work
as one in pursuing steps to improve the environment.
Status of implementation of Environmental Management System by Tokyo Gas and its consolidatedsubsidiaries (May 1, 2016)
Tokyo Gas Co., Ltd. [ISO]
<Residential Sales and Service Division>Living Engineering Co., Ltd. / Tokyo Gas Remodeling Co., Ltd. / Tokyo Gas Lease Co., Ltd. / Tokyo GasTelemarketing Co., Ltd. / Tokyo Gas Living Line Co., Ltd. / Tokyo Gas Lifeval NishiOta Co., Ltd. / TokyoGas Lifeval MinamiSetagaya Co., Ltd. / Tokyo Gas Lifeval Chiba Co., Ltd. / Capty Co., Ltd. (ResidentialSales and Service Division) [ISO]
<Energy Solution Division>Tachikawa ToshiCenter Co., Ltd. / Capty Co., Ltd. (Energy Solution Division) [ISO]
<Regional Development Division>Tokyo Gas Energy Co., Ltd. / Enelife Carrier Co., Ltd. / Tokyo Auto Gas Co., Ltd. / Tokyo Gas LPG TerminalCo., Ltd. / Tochigi Gas Co., Ltd. [ISO] / Washinomiya Gas Co., Ltd. [ISO] / Shoei Gas Co., Ltd. [ISO] /Nagano Toshi Gas Co., Ltd. [ISO] / Tokyo Gas Yamanashi Co., Ltd. / Showa Unyu Co., Ltd.
<Pipeline Network Division>Capty Co., Ltd. (Pipeline Network Division) [ISO] / Capty Tech Co., Ltd. ✽1 / Kawasaki Gas Pipeline Co.,Ltd. ✽2 / Tokyo Gas Pipeline Co., Ltd.
<Regasification & Power Generation Division>Tokyo Gas Baypower Co., Ltd. (Sodegaura Power Station) [ISO] ✽2 / Tokyo Gas Yokosuka Power Co., Ltd./ Ohgishima Power Co., Ltd.
<Energy Resources & Global Business Division>Tokyo LNG Tanker Co., Ltd. [ISO] ✽2
<IT Division>Tokyo Gas i Net Corp.
<Other>Tokyo Gas Engineering Solutions Corporation / Tokyo Gas Communications, Inc. / Tokyo Gas Auto ServiceCo., Ltd. / Tokyo Gas Urban Development Co., Ltd. [ISO] ♯1 / Tokyo Gas Facility Service Co., Ltd. [ISO] ♯2 /Tokyo Gas Site Development Co., Ltd. / Tokyo Gas Liquid Holdings Co., Ltd. / Tokyo Gas Chemicals Co.,Ltd. / Tokyo Oxygen And Nitrogen Co., Ltd. / Tokyo Carbonic Co., Ltd. / Tokyo Rare Gases Company, Ltd. /Japan Super Freeze Co., Ltd. [ISO] / Niccho Operation Co., Ltd.✽3 / Park Tower Hotel Co., Ltd. / Nijio Co.,Ltd.✽2 (Total of Tokyo Gas Co., Ltd. and 43 consolidated subsidiaries in Japan)
[ISO] ISO14001:2004 certification
In fiscal 2015, an internal audit of 50 divisions' conformance in the areas set forth in our internal auditing
plan found no instances of nonconformance with the requirements of the ISO 14001:2004 standards, and
EMS was found to be functioning effectively.
Included in the EMS activities of Capty Co., Ltd.✽1
Included in the EMS activities of Tokyo Gas Co., Ltd.✽2
Included in the EMS activities of Japan Super Freeze Co., Ltd.✽3
The ISO registration scope covers operational activities of the building of Shinjuku Park Tower (excluding the hotel).♯1The ISO registration scope covers the head office and the management division of the Park Tower.♯2
In addition to the ISOcompliant EMS, the Group runs an "EcoAction 21" program, an EMS program for subsidiaries andaffiliates developed by Tokyo Gas, a LIFEVAL EMS program, and EMS programs developed independently by individualgroup companies.
Result of Internal Audit
Tokyo Gas believes that being actively involved in both regional and global environmental issues is an
important aspect of our corporate management, and we conduct our business activities accordingly. We
identify the latent environmental risks present in our business activities, and we practice proper
management to mitigate them and prevent them from having a serious impact on the environment. We also
voluntarily research and publish information on the environmental impacts and pollution caused by our
operations in the past, and we believe that we must take swift action to address any concerns that arise in
order to protect the environment.
When serious environmental risks manifest themselves, we take swift emergency action and measures to
prevent a recurrence according to their risk level in accordance with our Emergency Response
Organization Regulations, and we also standardize management flows to ensure that secondary risks do
not arise.
In fiscal 2015, we committed no infringements and were subject to no fines under any laws or ordinances
on the environment.
Since fiscal 1999, we have been conducting soil tests and groundwater surveys on all land currently or
formerly owned by Tokyo Gas on which soil contamination may have occurred, such as the sites of old
plants. When contaminants have been found, we have proactively released the relevant information
through a variety of methods, including by reporting the issue to the relevant local authority, informing the
media, and explaining the situation to local residents. The revised Soil Contamination Countermeasures
Act came into force in 2010, and we will continue to abide by applicable laws and ordinances in a
responsible manner. Press releases related to soil contamination can be viewed under the List of Measures
Taken for Soil Remediation on our website. All necessary measures have already been fully implemented
at our sites.
Although virtually no hazardous chemicals are used in the process of producing and supplying gas, theGroup will continue to manage chemical substances in accordance with applicable laws and regulationsand take action to reduce emissions.
In fiscal 2015, the Group handled or otherwise dealt with the following amounts of substances subject toreporting under the PRTR Act.
State of Compliance with Environmental Regulations and Fines
Measures Taken for Soil Remediation
Management of Chemical Substances
Response to the PRTR Act✽
Tokyo Gas
Subsidiaries and Affiliates of Tokyo Gas
(Unit: kg)
Substance Amount handled Release Transfer Remarks
Xylene 4,414 0.1 0.0 Refueling
1,2,4Trimethylbenzene 2,251 0.0 0.0 Refueling
Toluene 9,595 0.5 0.0 Refueling
Nhexane 2,832 1.1 0.0 Refueling
Benzene 501 0.1 0.0 Refueling
(Unit: kg)
Substance Amount handled Release Transfer Remarks
Nickel 1,058 0.0 52.0 Heat exchanger brazing
Tokyo Gas identified and inspected specified products (commercial air conditioners, refrigerators, andfreezers) for which it is responsible as manager under the Act on Rational Use and Proper Management ofFluorocarbons, which came into force in April 2015. As a registered fluorocarbons filling/recovery operator,it also collected and appropriately disposed of fluorocarbons removed during inspections and maintenanceof GHP products.
VOC Measures
Since 1991, Tokyo Gas has been working on reducing VOCs (volatile organic compounds) emission when
painting items such as gas holders. Recent efforts include the transition to a painting method that uses
weak solventbased paints (low VOC paint method). We will continue to work on further VOCs emission
reduction.
Hazardous waste management
Act on Confirmation, etc. of Release Amounts of Specific Chemical Substances in the Environment and Promotion ofImprovements to the Management Thereof
✽
Measures for Fluorocarbons
Estimated Leakage as Manager
Amounts Filled, Recovered, and Destroyed by Tokyo Gas as a RegisteredFluorocarbons Filling/Recovery Operator
(Unit: tCO eq)
Substance Estimated leakage
HCFC 44.0
HFC 129.1
(Unit: kg)
Substance Filled Recovered Destroyed
HCFC 54.0 29.8 29.8
HFC 4.0 1.6 1.6
2
Paintwork on gas holder
Hazardous waste management
Hazardous waste held by Tokyo Gas that contains PCBs is centrally stored at the Negishi LNG Terminal
and other sites, and managed appropriately in accordance with the Act on Special Measures concerning
Promotion of Proper Treatment of PCB Wastes. Items such as highlevel PCBcontaminated high voltage
transformers and capacitors and lowlevel PCBcontaminated waste are processed properly in line with
administrative processing schedules and policies. Highlevel PCBcontaminated capacitors and stabilizers
of less than 3 kg were preregistered with JESCO in the first half of fiscal 2016 and are to be appropriately
disposed of in fiscal 2017.
Disposal of PCB Waste in FY2015
Substance Disposal amount
Lowlevel PCBcontaminated high voltage transformers and capacitors 10 units
Lowlevel PCBcontaminated reactors 3 units
Lowlevel PCBcontaminated discharge coils 6 units
The Group recognizes concerns that climate change may affect our business activities as follows, and is
taking appropriate action in response.
Global warming countermeasures (mitigation)
In order to reduce emissions of greenhouse gases, which are considered to be a cause of temperature rise,
the Group has formulated Guidelines for Global Warming Countermeasures and will act to reduce
emissions from our main sources of emissions, namely city gas production facilities, district heating and
cooling centers, power plants, and offices, as well as work to reduce emissions at customers' sites.
<Link>Toward the Realization of a Low Carbon Society
Natural disaster countermeasures (adaptation)
Among the possible effects of climate change (heavy localized downpours, storm surges, etc.) are damage
to city gas facilities and delays to or interruption of LNG supplies in transit. Tokyo Gas is therefore
hardening its production and supply facilities against disasters, and is making active use of privatesector
weather forecasts to help prepare for and prevent wind and flood damage. In addition, we believe that
diversifying the sources of the LNG we use to make city gas will help limit disruption to supply chains in the
event that a source is struck by a natural disaster.
Response to stricter legal regulation to combat climate change
Regulations in areas such as carbon emission trading and carbon taxes may impose constraints on the use
of fossil fuels. However, by stepping up efforts to encourage fossil fuel users to switch from oil and coal to
cleaner natural gas, promote wider adoption of highly energy efficient equipment and systems such as
cogeneration systems, encourage renewable energy use, and develop smart energy networks, we are
committed to contributing to the realization of a low carbon society.
Action on Climate Change
The Group recognizes threats to water resources as a business risk and therefore manages the amount of
tap water, industrial water, and seawater it uses in order to conserve freshwater and control wastewater
emissions. In fiscal 2015, we used a total of 5,421 thousand m of freshwater at the LNG terminals where
city gas is produced, district heating and cooling centers (DHCs), power plants using LNG, offices, and
other facilities in Japan. We are working to reduce process water consumption at LNG terminals, DHCs,
and power plants by optimizing boiler operation, reducing steam loss, replacing chillers with more efficient
electric turbo types, and more. To reduce our use of tap water at offices and similar facilities, we are
making greater use of wastewater, installing watersaving toilets, and encouraging employees to conserve
water. Regarding wastewater, we measure emissions and manage indicators of water quality, including pH,
COD,✽ and nitrogen and phosphorus concentrations, in accordance with local government ordinances,
agreements, and other relevant standards. Seawater is used mainly at LNG terminals and power stations
as a heat source, and is returned in its entirety to the sea. Looking overseas, although we are not presently
doing business in any regions subject to high water risk, we will monitor risks wherever we establish
operations and respond appropriately as we accelerate our globalization in the years ahead,.
Water resource inputs of Tokyo Gas Group (tap/industrial water)
Action on Water Risks
3
COD: Chemical Oxygen Demand.✽
As an energy company, Tokyo Gas Group recognizes its duty to prioritize action to prevent global warming.
We have therefore established Guidelines for Global Warming Countermeasures that set concrete
numerical targets, and are working as a group to put them into practice. As CO emissions from LNG value
chains are highest at the city gas consumption stage, i.e., customers' sites, we place a strong focus on
curbing emissions at this point and are pursuing a variety of strategies to achieve this, including the
development and adoption of lowcarbon systems. In the electric power segment of our business activities
(see diagram below) we are taking active steps to generate power using highefficiency thermal power
plants, and generate and procure more power produced using renewable energy. We are also monitoring
the impact on global warming of our raw material procurement activities, and are working with group
companies to deploy highefficiency LNG carriers to reduce emissions from transportation by sea.
Looking ahead, we will contribute further to the fight against global warming by rolling out our CO emission
reduction technologies to other countries and other means in order to meet social needs and expectations
in the wake of COP21.
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2
Greenhouse Gas Emissions along the LNG Value Chain (FY2015)
<Link>Tokyo Gas Group Business Activities and Material Balance
Action along the LNG value chain (FY2015)
Calculated based on emission intensity analyzed following the LCA (lifecycle assessment)✽1, 2
Standards for calculation and reporting of greenhouse gas emissions: Scope 1: Business's own direct emissions of greenhouse gases. Scope 2: Indirect emissions from consumption of electricity, heat, and steam supplied by others. Scope 3: Indirect emissions other than covered in Scope 1 and 2 (emissions by other parties involved with business'sactivities).
✽3,4
As gas use by customers is the largest source of CO emissions along the LNG value chain, Tokyo Gas
Group places a particular focus on reducing CO emissions at customers' sites. Specifically, we are
pursuing a number of strategies to achieve this, including not only encouraging users to switch from other
fuels to natural gas, but also the development and dissemination of highly energyefficient equipment and
systems, the support of renewable energy use, and the development of smart energy networks. We also
suggest ways our customers can use energy more efficiently in their daily lives through activities including
the provision of "EcoLife" proposals and energy and environmental education for the next generation.
2
2
Reduction of CO2 Emissions at Customers' Sites✽
Reduction due to diffusion of gas cogeneration and natural gasfired power generation was calculated using marginalcoefficients (respectively 0.69 kgCO /kWh (demand side) and 0.65 kgCO /kWh (transmission side)).
✽
2 2
To cut the CO emissions generated when customers use city gas, we are developing and promoting wider
use of highly energyefficient equipment and systems.
In the residential sector, we are developing and encouraging wider use of gas stoves fitted with highly
energyefficient burners, highefficiency latent heat recovery gas water heaters, and home generators that
utilize waste heat at the same time as they generate electricity.
Whereas conventional residential gas water heaters have a maximum heating efficiency of 80%,✽ high
efficiency EcoJOES home water heaters come equipped with an exhaust heat and latent heat recovery
system that boosts this figure to 95%.✽ Assisted by the industrywide “EcoJOES Adoption Campaign” to
promote the adoption of EcoJOES, the number of home installations is rising by the year. As of the end of
fiscal 2015, the number shipped by the industry as a whole had reached some 6,270,000. Our estimates
show that these units produce 13% lower CO emissions than conventional models. We are also adding
EneLook functionality to our water heater remote controls to display how much gas and hot water is being
used, helping our customers to save water and energy.
2
Popularization of highefficiency gas appliances in the home
Popularization of highefficiency EcoJOES water heaters
2
Calculated on higher heating value (HHV) basis.✽
How EcoJOES HighEfficiency Water Heaters Work
Aisin model Panasonic model Yanmar model
In the commercial air conditioning market, we are promoting the GHP XAIR gas heat pump airconditioning
system, which cuts annual energy consumption compared with previous models, and "natural chillers"
which use natural refrigerant for building use. We are also encouraging adoption of Suzuchu cool kitchen
systems, which reduce heat and airconditioning load in locations such as restaurants and hotel kitchens.
Popularization of highefficiency gas heat pumps (GHPs)
GHP airconditioning systems both save power and conserve energy, and we have been working to
promote the XAIR series of GHPs, which are the most efficient of all. In October 2015 we launched the
even more energyefficient GHP XAIR II with 20% lower annual primary energy consumption than its
predecessor. This is made possible by its lower engine speed in the light load zone that accounts for much
of the system's running time, allowing it to function even more efficiently.
GHP XAIR II
Annual Energy Consumption Compared to the XAIR
Comparison between 15yearold model and XAIR based on actual past performance. Comparison between XAIR and XAIRII based on Tokyo Gas estimates.
✽
Our Green Help Pro✽ service achieves energy savings without sacrificing comfort by allowing GHPs to be
controlled over the Internet so that they can be operated more efficiently and their operating status can be
tracked at a glance. Since April 2016, we have also offered Smart Multi airconditioning systems, which
help lower energy consumption, CO emissions, and peak load by combining a GHP with an electric heat
pump (EHP) using the same refrigerant system. These can be optimally controlled by the ENESINFO
remote control service, also launched that same month.
2
Green Help Pro is a registered trademark of Tokyo Gas.✽
In the industrial sector, we are dramatically cutting CO emissions by enabling energy users to switch from
fuels such as oil and LPG to natural gas, and to use natural gas in more sophisticated ways. We are also
helping businesses reduce their energy use, CO emissions, and costs by delivering a variety of solutions.
These include TG Miru Net, which monitors and analyzes facilities online so that customers can keep track
of their energy usage at a glance, and the Steam Fit steam energy service, which helps customers optimize
their generation, supply, and use of steam.
Promotion of highefficiency burners for industrial furnaces
Regenerative burner systems work by capturing the heat from exhaust gas in a heat reservoir and using it
to preheat an air feed, resulting in extremely high combustion efficiency coupled with low NOx emissions.
Up to 50% more energy efficient than conventional systems, these systems are drawing attention for the
crucial contribution that they can make to reducing CO emissions from industrial furnaces.
Reducing CO emissions by switching to natural gas and using it more efficiently
Switching from fuels such as oil and LPG to natural gas can reduce CO emissions by about 25%.
However, emissions can be slashed even further by switching to more efficient equipment and systems and
making more sophisticated use of natural gas.
2
2
2
Regenerative burner system
2
2
Gas cogeneration systems (CGSs) are distributed energy systems that generate electricity by means of a
highefficiency engine powered by clean natural gas, a turbine, and a fuel cell, while capturing the waste
heat generated in the process to produce steam or hot water, which is then supplied, along with electricity,
in the location of installation. Systems of this kind are very environmentally friendly, enhance energy
security (by providing power source redundancy), and help conserve electricity. At the end of fiscal 2015,
1,943 MW of CGS capacity (excluding the residential sector) was in operation in Tokyo Gas's service area.
Innovations in gas cogeneration technology
Some CGSs surpass the average efficiency (on the demand side, including transmission loss) of
conventional thermal power plants as a whole due to advances in generating efficiency pursued during
technology development, and it will be possible to achieve major reductions in energy consumption and
CO emissions as well by combining these technologies with effective waste heat recycling technologies. In
fiscal 2015, we launched a new compact 35 kW CGS model that achieved topofitsclass total efficiency of
88% thanks to the increased amount of waste heat captured by employing stoichiometric combustion✽ and
the higher heat exchange efficiency made possible by improvements to the heat exchanger. The use of
hightemperature operating solid oxide fuel cells (SOFCs) is expected to lead to even more efficient CGSs
in the future.
2
A method of combusting a gas fuel mixed with air at a concentration at which they react completely.✽
Effective use of energy and reduction of CO emissions by a gas cogeneration system
Commencement of 5 kWclass commercial fuel cell demonstration trial at a public facility inArakawa
In March 2016, we installed a 5 kWclass commercial
fuel cell at the Arakawa Sogo Sports Center in Arakawa,
Tokyo, and a demonstration trial is now underway. The
approximately oneyear trial will run until the end of
March 2017 and is being conducted under an
agreement on realworld testing of 5 kWclass
commercial fuel cells signed between Arakawa and
Tokyo Gas at the end of 2015. It is the first trial of its
kind to be conducted at a public facility in Japan.
Electricity generated by a commercial SOFC will power
firstfloor lighting at the center, while waste heat will be used to produce some of the hot water for
locker room showers. During the trial, a monitor will be displayed showing the amount of electricity
generated by the SOFC, and visitors will be able to experience the hot water produced for
themselves. The project will be used to raise awareness of fuel cells and the contribution that they
2
Estimated by Tokyo Gas.Note:
On a lower heating value (LHV) basis. The heat efficiency and total loss of thermal power plants was calculated based onthe FY2003 operating performance of the nine electric power companies and wholesale electricity utilities (Subcommittee onClassification Standards for Plants and Other Facilities, September 2005).
✽1
Efficiency of gas cogeneration system on an LHV basis using the recommended configuration.✽2
Grid power emission factor of 0.66 kgCO /kWh (average thermal power factor in fiscal 2030 according to the Plan forGlobal Warming Countermeasures announced in May 2016).
✽3 2
Presentation on the 5 kWclass commercialfuel cell demonstration trial
can make to creating a low carbon society.
Breaking the 80% power generation efficiency barrier: Successful development of a theoretical design for an innovative concept to dramatically improve solid oxide fuel cell efficiency
In a joint study, Kyushu University's NextGeneration Fuel Cell Research Center (NEXTFC) and
Tokyo Gas have succeeded in designing an innovative concept to dramatically improve the
electrical efficiency over 80% LHV (lower heating value) of SOFCs and proving its mechanism in a
world first. This result was published in July 2015 in Scientific Reports, Nature's sister online
publication.
Superefficient energy conversion from fossil fuel to electricity is expected to make a major
contribution to reducing CO emissions and provide the core energy technology for creating a
highly environmentally friendly smart energy society. In addition, superefficient power generation
systems are potentially far more adaptable to market needs because they produce so little waste
heat during the power generation process that they can eliminate the need to make use of waste
heat.
Schematic of Innovative Concept for Further Improving the Electrical Efficiency
Residential cogeneration systems: ENEFARM fuel cells for home use
In a world first, the ENEFARM residential fuelcell cogeneration system designed for use in detached
dwellings went on general sale in May 2009. ENEFARMs can cut primary energy consumption (at rated
operation) by about 37% and CO2 emissions by about 47% (1.2 t/year) compared with conventional
systems producing an equivalent amount of electricity (0.7 kWh) and heat (1.01 kWh). They are expected
to play a key role in taking the fight against climate change into the home.
2
The ENEFARM lineup for detached dwellings underwent facelifts in 2011 and 2013, followed by the
release of a new fourth model in April 2015. To meet demand for a way to be able to continue using
electricity during power outages, the new model has a builtin selfsustaining power generation capability
allowing operation during a grid power failure (formerly only available as a separate option). In another
world first, an ENEFARM model designed specifically for home use in housing complexes was launched in
April 2014. Due to the more restrictive installation conditions found in condominiums than in detached
homes, this new model's main unit was made more airtight, allowing it to be installed in the pipe shafts of
open hallways in condominium buildings. So that it could be installed on higher floors as well, it was also
made more earthquake resistant by strengthening the legs used to anchor the unit, and the supply and
exhaust structure was modified to improve wind resistance and allow operation in strong winds. In July
2016, the condominium model range was further expanded with new models with added functionality such
as builtin selfsustaining power generation capability. In March 2016, combined sales of ENEFARMs for
detached homes and condominiums hit the 60,000 mark.
"ENEFARM" residential fuel cellcogeneration system
CO emissions (gCO )
(Assumptions for estimates)
2 2
Comparison with a conventional system used to produce the equivalent amount of electricity (0.70kWh) and heat (1.01 kWh/approx. 35 L at 40 °C with water temperature of 15 °C) as an ENEFARM atrated operation for one hour
CO emission factor: 0.65 kgCO /kWh for electricity (average factor for thermal power in FY2013 according to the Plan forGlobal Warming Countermeasures (May 2016)), 2.29 kgCO /m for gas (Tokyo Gas data)
(1) 2 22 3
Annual load: 16.6 GJ for hot water, 1.3 GJ for bath reheating, 2.2 GJ for cooking, 6.4 GJ for AC (cooling), 12.7 GJ for floorheating, 5.5 GJ for AC (heating), 12.5 GJ for lighting, etc. (for a fourperson family living in a detached dwelling with a totalfloor area of 120 m )
(2)
2
Electricity demand for a dwelling supplied with both gas and electricity (using conventional systems): 4,223 kWh (includingpower consumed by gas water/space heater)
(3)
Equipment used for conventional system: gas water/space heater, gas hydronic floor heating (living room), gas stove,electric AC used for cooling and heating in other rooms ENEFARM: ENEFARM, gas hydronic floor heating (living room), gas stove, electric AC used for cooling and heating inother rooms
(4)
Figures may not sum due to rounding.Note:
Maximum adoption of renewable energy sources is essential to the development of a low carbon society.
However, given the current state of renewable energy technology, there is presently little installed
renewable capacity and costs remain high. Vulnerability to changing weather conditions and other factors
also work to make renewables an unstable energy source.
To counter these problems, Tokyo Gas Group offers systems that combine renewable use with gas
appliances to compensate for the instability of solar output. Natural gas cogeneration systems (gas CGSs)
provide a comparatively easytocontrol means of meeting heat demand that can compensate for the
instability of power generation using renewables, making it the ideal "partner" for encouraging the further
adoption of renewable energy technologies. It is also possible to make efficient use of a regions' latent
biomass resources by deploying such natural gasbased technologies as multifuel combustion.
Tokyo Gas offers two solutions that combine use of gas and renewables in the home: Dual Power
Generation, which combines photovoltaic power generation with an ENEFARM or an ECOWILL home
generator, and SOLAMO, which combines solar heating with an EcoJOES highefficiency water heater.
Both of these solutions provide the backup systems needed when actively utilizing solar energy given its
fluctuating output, and can make a major contribution to reducing households' environmental footprints.
Alongside SOLAMO, we also offer commercial users a solar cooling system which uses solar thermal
energy for air conditioning, in order to further encourage their adoption of renewable energies.
Schematic of Water Heating System Using Solar Heat
Active Utilization of Solar Energy
Schematic of Dual Photovoltaic and ENEFARM Power Generation
The photovoltaic system is not a Tokyo Gas product.Note:
Solar heat collector
Biomass is the generic term for plant and animalderived organic resources (excluding fossil resources)that
can be recycled into energy and material. Examples of biomass are rice straw, forest and fishery products
such as livestock excrement, food waste, sewage sludge, and waste wood. Driedbiomass can be
combusted directly to obtain heat and electricity from the steam thus generated, and also wetbiomass can
be fermented to produce biogas for use as energy by, for example, cogeneration systems. As the CO
emitted as a result of combusting biomass or biogas is CO2 that had been absorbed from the atmosphere
by photosynthesis during organic processes, using energy from biomass in place of energy derived from
fossil resources can make a major contribution to reducing total CO emissions, which is one of the
greenhouse gases driving global warming.
We aim to expand and popularize the use of biomass to help reduce greenhouse gas emissions by
promoting not only the technologies for using biogas that we have developed to date (such as mixed
combustion of city gas and biogas), but also technologies for generating biogas more economically and
efficiently through methane fermentation of biomass such as food waste, together with technologies for
upgrading the biogas into higher quality gas.
Schematic of Solar Cooling System Using Solar Heat
The natural chiller is used to provide air conditioning in summer. Natural chiller: An airconditioning system that uses heat from the vaporization of water. A solar natural chilleruses solar heat as well as gas as its heat source to reduce energy consumption and cost.
✽
Effective Use of Biomass
2
2
Pilot methane fermentation plant at a research institute
Development of biogas utilization technologies
Tokyo Gas Group possesses technologies for digesting biomass such as food waste and sewage sludge
for use as fuel for boilers and power generators, and is currently using biogas generated at customers' sites
primarily as fuel for generating electricity by CHP (onsite use). As biogas is a lean fuel consisting of
approximately 60% CH and 40% CO , CHP must be specially designed to run on it.
We were the first in Japan to begin upgrading biogas, adjusting its calorific value, and odorizing it so that it
could be injected to city gas grid. In fiscal 2015 we received 675 thousand m of biogas (equivalent to an
approximately 1,151ton reduction in CO emissions) derived from food waste into our pipelines.
How Biogas is Fed into Gas Pipelines
In addition to the above, we have been engaged in joint research with Yokohama City since fiscal 2013 with
the goal of broadening the use of biogas generated at the North Yokohama Sludge Recycling Center. For
this project, research is being conducted on ways to remove CO from digestion biogas using separation
membranes to produce concentrated methane, and we are also studying ways of using biogas in high
efficiency CHP such as solid oxide fuel cell (SOFC) systems.
4 2
3
2
2
Test biogas refiner at the Yokohama CityHokubu Sludge Treatment Plant
Developing a sustainable society requires not only reducing CO emissions as has long been sought, but
also societywide action to conserve electricity and ensure energy security.
As one means of solving issues such as these, Tokyo Gas Group is promoting the development of "smart
energy communities" to make smarter use of energy by connecting the buildings in a community via a heat
and electric power network. At the same time, we are pursuing improvements at the building level to turn
homes, office buildings, and factories into smarter energy users.
Creating Smart Energy Communities
Smart energy communities are created by developing smart energy networks (SENs). These combine a
gas cogeneration system for generating and consuming heat and electricity locally with the use of
renewable and untapped energy resources to create a heat and electricity network across which energy
supply and demand is optimized by energy management using ICT. Making wastefree use of heat and
electricity at the community level in this way serves to raise energy efficiency in the community as a whole,
allows business activities and everyday life to be sustained in the event of a power outage, and enhances
cities' value.
Energysmart community development is spreading throughout the Tokyo metropolitan area, further
propelled by central and local government policies.
<Link>Social Report / Working with Local Communities / Safe and Secure Ways of Life and Urban Development
To promote smarter energy use in everyday life, we built an employee dormitory in Isogoku, Yokohama,
that makes maximum use of renewable energy and distributed energy systems, and conducted
demonstration tests there for three years from April 2012 to March 2015.
The tests involved sharing energy at the housing complex level and operating systems efficiently by means
of integrated control. Residents were encouraged to save energy by providing incentives and by enabling
them to keep track of their energy usage at a glance by means of a home energy management system
(HEMS). The tests confirmed the energysaving effect of these measures in residentoccupied areas.
Demand response using ENEFARM and storage battery cell systems was also tested under realworld
conditions designed to replicate power shortages at the local level.✽
The project achieved an approximately 30% reduction in energy consumption and a 38% reduction in CO
emissions overall thanks to the installation and efficient use of ENEFARMs and other equipment. We also
achieved a 7% energy saving in residentoccupied areas as a result of changes in resident behavior
brought about by the installation of HEMS. In addition, peak load was cut by 58% in summer and 49% in
winter as a result of demand response.
2
Making Life Smarter
2
This is a means of adjusting electricity demand on the user side in response to a request to limit power use. Supply anddemand for heat and electricity in an entire residential building is controlled by an integrated control system. When a demand
✽
Isogo Smart House Demonstration Project A 24unit Tokyo Gas employee dormitory consisting of four stories aboveground and a basement. It was also used for the FY2011 NextGenerationEnergy and Social Systems Demonstration Project and the FY2010 MLITHouse and Building CO Reduction Pioneer Project.
Housing Complex Smart House Demonstration Project
We are pursuing ways of enabling visual tracking of energy usage in office buildings, factories, and other
facilities by using building energy management systems (BEMS) and smart meters. We are also working to
enhance energy services to enable, for example, optimized operation and control of cogeneration systems,
renewable energy, air conditioners, and boilers in order to reduce energy consumption and CO2 emissions
at customers' sites.
response signal is received from the local energy management system during peak load periods, the system tells thebuilding's ENEFARM fuel cells to maximize output. At the same time, individual households are asked to conserve electricityby the home energy management system.
2
Promotion of Smart Office Buildings and Factories
Schematic of an Energy Smart Commercial Building
Visual tracking of energy use by TG Green Monitors
The TG Green Monitor service provides data on energy use measured at the customer's end by displaying
it using easily understood graphs and other visual aids. Customers access the service via a special section
of our website. Providing customers with an easy means of tracking their energy usage is an effective way
of encouraging them to save energy.
Typical TG Green Monitor Screenshot
Saving energy and electricity at commercial buildings with RakuSho BEMS
RakuSho (Easy Conservation) BEMS ("the winning way to save energy") is a service launched in fiscal
2013 by which Tokyo Gas monitors customers' equipment and energy usage to help them save energy and
electricity. This system centrally manages the operation of electrical facilities (air conditioning, ventilation,
lighting, etc.) and gas equipment (GHPs, natural chillers, boilers, Genelight, etc.) at primarily small and
mediumsized commercial facilities, helping them to save energy and conserve electricity. Control of GHP,
ventilation systems, and other equipment has led to energy savings at customer facilities (commercial
multitenant buildings) where RakuSho BEMS is used, reducing gas consumption by approximately 11%
and electricity consumption by approximately 4%. Customers have also been able to cut their peak
demand by approximately 6% (as of February 2015).
Typical Energy Savings Achieved by Using RakuSho BEMS at a Customer Facility (CommercialMultiTenant Building)
Example of a RakuSho BEMS System
Among the types of automobile that are currently commercially viable, Tokyo Gas is working to popularize
the use of clean, low CO emitting natural gas vehicles (NGVs). We are also helping to develop the
hydrogen supply infrastructure to assist the spread of fuel cell vehicles, which emit no CO at the
combustion stage, in order to diversify fuel use.
There are presently about 45,000 NGVs on Japan's roads (as of March 2016), and their numbers are
steadily growing. In fiscal 2015, a further 410 NGVs (primarily trucks and garbage trucks) appeared on the
roads in our service area alone. As of the end of March 2016, there were 16,205 NGVs in operation in our
service area. In addition, there were 76 natural gas stations (including 13 fueling stations used solely by
buses or delivery vehicles) in our service area.
Number of NGVs in Use (in Tokyo Gas's Service Area)
Environmental friendliness of NGVs
As NGVs use natural gas as fuel instead of diesel or gasoline, they emit almost no black smoke or SOx. In
terms of NOx emissions, the newest NGV models even clear the future emission regulations introduced in
October 2016, considered the world's most stringent. They produce about 10%20% fewer CO emissions
than gasoline vehicles and are receiving positive coverage as environmentally friendly vehicles.
2
2
Popularization of NGVs
2
New longrange heavyduty CNG truck launched (Isuzu Motors Limited)
NGVs' environmental friendliness, cost performance, and superiority in terms of improved energy
security make them a highly viable alternative to gasoline vehicles, and NGV cargo trucks, buses,
garbage trucks, vans and other vehicles are already in widespread use on urban roads. Until now,
however, almost all longdistance intercity road haulage has still used vehicles running on diesel. In
light of the need to diversity fuel use to improve energy security, Isuzu Motors Limited in December
2015 unveiled a new heavyduty NGV truck model. This means the medium and lighttrucks used
on urban roads will now be joined by heavyduty trucks for longdistance intercity haulage, thus
enabling CO emission and cost reductions throughout the logistics sector.
Development of the Hydrogen Supply Network
Construction and operation of hydrogen stations
We are building and operating hydrogen stations and contributing to the development of the hydrogen
supply infrastructure in order to promote wider use of fuel cell vehicles. Our goal is to reduce carbon
emissions and diversify fuels in the transportation sector.
Having previously built and operated two hydrogen stations (one in Senju and another in Haneda) for R&D
and demonstration purposes, we began building our first hydrogen stations for ordinary commercial use in
fiscal 2013. The first to be completed was the Nerima Hydrogen Station, which became the Kanto region's
first commercial hydrogen station when it opened in December 2014. It was followed by the Senju
Hydrogen Station, which was repurposed for commercial use in January 2016. One month later, in
February 2016, we opened our first hydrogen station in Saitama Prefecture, the Urawa Hydrogen Station.
The Nerima Hydrogen Station uses an "offsite" system for receiving hydrogen produced elsewhere and
supplying it to fuel cell vehicles onsite. Our Senju and Urawa stations, on the other hand, are "onsite"
stations that supply fuel cell vehicles with hydrogen produced onsite from city gas.
NOx/PM Limits
Diesel limits are for diesel vehicles weighing over 3.5 tons GVW.✽
2
Nerima Hydrogen Station Senju Hydrogen Station Urawa Hydrogen Station
From city gas to hydrogen supply (an onsite hydrogen station)
Taking advantage of city gas's low CO emissions and limited impact on the environment, Tokyo Gas is
reforming it to generate hydrogen.
Development of hydrogen technologies
Tokyo Gas is pursuing R&D on hydrogen stations for supplying hydrogen fuel to fuel cell vehicles as a
participant in the FY201317 research and development project on hydrogen utilization technology run by
the New Energy and Industrial Technology Development Organization (NEDO). Through this program, we
are investigating methods of controlling the quality of hydrogen fuel dispensed to fuel cell vehicles,
assessing measurement accuracy when refueling, and studying ways of refueling fuel cell vehicles other
than passenger cars (i.e., buses and motorcycles). We are also developing industry guidelines on these
methods and are working to have them incorporated into international standards. We are further exploring
efficient ways to run commercial hydrogen stations and to reduce maintenance costs.
Refueling a Toyota MIRAI FCV
2
A device for cooling hydrogen to prevent the temperature in an FCV's fuel tank from rising during refueling.✽
EneLook remote control
HEMS terminal
We provide lifestyle solutions, including means of "visualizing" energy use and approaches to saving
energy, to enable our customers to make smarter use of energy in their everyday lives.
"Visualization" of Energy Usage
The meter reading slips distributed every month to customers' homes indicate their gas consumption at the
same time a year before so that they can compare it with their current usage. Customers can also check
their monthly gas and electricity bills and usage online by accessing the myTokyoGas service, which
displays their data in an easytounderstand graph. We also provide ways of better "visualizing" energy
usage through technologies such as the EneLook remote control, which displays the gas and water used
by home water heaters, to enable customers to keep a visual track of their energy use. Tokyo Gas's high
efficiency EcoJOES water heaters with latent heat recovery come with EneLook remote control as a
standard feature, and we are equipping all our new products with ecomode functionality to help customers
conserve water and energy. Looking ahead, we aim to promote energysaving, lowcarbon behavior by our
residential customers by enabling them to keep a visual track of their usage of all forms of energy in the
home, including gas and electricity, by incorporating the results of our realworld trials of home energy
management systems (HEMS).
EnergySaving Lifestyle Solutions
We provide a number of publications and services to help customers make smarter use of energy and lead
greener lifestyles. These include The Ultra Energy Saving Handbook, which is full of ideas on how to save
energy, and our ecocooking classes, which teach people how to both cook and eat greener. At our Gas
Science Museum, we have exhibits and programs that engage children through all five senses to teach
them about energy and the environment in an enjoyable way. Visitors are encouraged to think about how
The Ultra Energy SavingHandbook
Ecocooking class
Gas Science Museum "The Save the Earth Best BalanceChallenge!" exhibit teaches visitorsabout how energy sources can becombined in an environmentally friendlymanner
Tokyo Gas is a member of the Lifestyle Creation
Workshop (an organization of experts and housing
related groups organized by the Japan Gas Energy
Promotion Council) and the allied Energy Saving
Behavior Workshop. In addition to researching and
surveying ways of popularizing energysaving behavior,
we are developing easytodisseminate resources to
effectively promote energysaving behavior among
homerelated businesses and ordinary consumers.
The resources we have developed to date include
"green action" playing cards (which provide a simple
introduction to energysaving behavior through card
games), a home improvement board game (which
demonstrates the effects that home improvements can
have as players progress through the game), and The
Energy Saving Starter Book (an instructor's textbook
with worksheets for use when incorporating the topic of
energysaving behavior into school lessons). We are
working to promote the use of these resources, and will
"Green action" playing cards with tips on howto save energy
Home improvement board game
they can use and choose energies in an environmentally friendly way in their everyday lives, and what they
can do in practice to protect the environment at the local level.
Research on effectively promoting energysaving behavior
work to assess how their use can affect everyday
behavior.
The Energy Saving Starter Book
Natural gas drilled overseas is liquefied and transported by carrier in the form of LNG at a temperature of
162 °C. Tokyo Gas produces city gas at its terminals in Negishi, Sodegaura, Ohgishima, and Hitachi for
supply via a network incorporating mutual backup arrangements.
Little energy is used in the process of making city gas from LNG, and energy efficiency at the production
stage is at least 99%. As city gas is supplied directly to where it is used in gas form, energy loss during
production and supply is negligible.
We are making even further efforts to conserve energy by, for example, using the cold energy of LNG.
Ohgishima LNG Terminal
High Efficiency of the City Gas System
One kilogram of 162 °C LNG has sufficient cold energy to freeze 2.5 kg of water. We are using this cold
energy at various temperature levels for applications including power generation, cold storage, and the
production of dry ice. In all, 2,364 thousand tons was used in this way in fiscal 2015. At the Negishi LNG
Terminal, about 35% of the electricity used is generated from cold energy. In fiscal 2015, 29,441 MWh was
generated from cold energy, resulting in a CO emission reduction of about 20,000 tons.
Utilization of LNG Cold Energy
2
Purpose of use LNG used for cold energy (1,000 tons)
Supplied to subsidiaries and affiliates 852
Electricity generated using cold energy 724
BOG✽ processing 788
Total 2,364
Cold Energy Use in FY2015
Boiloff gas. This is gas generated by the vaporization of LNG in tanks caused by heat leaks from the atmosphere.✽
Tokyo Gas Group has to date contributed to preventing global warming by actively expanding its use of
renewable energy sources, such as wind power, to generate electricity to supplement its highefficiency,
environmentally friendly natural gas power plants. Now that the electricity retail market has been
completely liberalized and we are also an electricity retailer, we will strive to increase procurements from
highefficiency thermal and renewable power plants as well in order to lower our emission factor at the
retail stage. We have been a participant in the Electric Power Council for a Low Carbon Society since its
inauguration, and through our involvement we will work with other electricity utilities to build a low carbon
society.
Tokyo Gas currently has stakes in power plants operated by Tokyo Gas Baypower Co., Ltd. (100,000 kWh,
wholly owned by Tokyo Gas, 50% maximum efficiency on an LHV basis at the generating end), Tokyo Gas
Yokosuka Power Co., Ltd. (240,000 kW, 75% owned by Tokyo Gas, 51% maximum efficiency), Kawasaki
Natural Gas Power Generation Co., Ltd. (420,000 kW x 2 units, 49% owned by Tokyo Gas, 58% maximum
efficiency), and Ohgishima Power Co., Ltd. (400,000 kW x 3 units, 75% owned by Tokyo Gas, 58%
maximum efficiency).
In addition to these sources, in September 2014 we decided to receive the entire output (approximately
1,200,000 kW) of the Moka Power Station, which Kobelco Power Moka Inc. (a wholly owned subsidiary of
Kobe Steel, Ltd.) is preparing to build in Moka, Tochigi Prefecture. (The plant's first unit will be completed in
late 2019, and its second in early 2020.)
These plants are all highly energyefficient natural gas power plants that generate electricity using cutting
edge gas turbine combined cycle technology.
Using the electricity generated by these newly built highefficiency power plants in place of electricity
produced by less efficient existing thermal power plants will help reduce our CO emissions by the resulting
difference in CO emissions per unit of electricity generated.
Ohgishima Power Station now
Gas turbine combined cycle technology
Combined cycle power plants that use liquefied natural gas (LNG) as fuel achieve higher generating
efficiency by using the heat captured from a gas turbine to convert water to steam, which is then recovered
to drive a steam turbine that also generates electricity.
CuttingEdge HighEfficiency Natural Gas Power Plants
2
2
Steps in the Power Generation Process
The Group is expanding its procurements of electricity from renewable sources in order to contribute to the
development of a low carbon society.
Wind power plants' generating costs have come down in recent years, thanks in part to increases in scale,
and they are increasingly expected to become one of the most important sources of renewable energy. We
built a wind power plant with an output of 1,990 kW at our Sodegaura LNG Terminal and have been
generating wind power since 2005. The Sodegaura wind power facility was decertified under the Act on
Special Measures Concerning New Energy Use by Operators of Electric Utilities ("RPS Act") in March
2013, and certified instead as a facility under the Act on Special Measures Concerning Procurement of
Electricity from Renewable Energy Sources by Electricity Utilities ("FIT Act"). Electricity generated is sold to
ENNET Corporation, an electricity retailer.
Our second venture into the wind power business began with the announcement in April 2011 of our
investment in Shonai WindPower Generation Co., Ltd. Shonai WindPower Generation was established in
December 2003, and it now operates two wind power plants in Yamagata Prefecture, including the Yuza
Wind Power Plant (operational since December 2010), which have a combined power generating capacity
of 15,910 kW and estimated annual electricity output of 37 GWh. In February 2016, we teamed up with
Fukushima Prefecture to jointly submit an environmental impact statement for a wind power generation
project in Fukushima to the Ministry of Economy, Trade and Industry and the relevant local governments,
and we are now surveying wind conditions and other factors in preparation for implementing the
provisionally named "Fukushima Coastal Wind Power Generation Initiative."
Promotion of Renewable Energies
Wind power facility at Sodegaura LNG Terminal
In other ventures, on January 19, 2015, we signed a power purchasing agreement with Kuroshio Furyoku
Hatsuden K.K., and we have been purchasing approximately 12,000 kW of electricity under this agreement
since April 2015. This electricity is generated by two plants operated by Kuroshio Furyoku Hatsuden in the
Kanto region: the Choshi Takadacho Wind Power Plant, which entered service in 2006 and has one 1,990
kW turbine, and the Shiishiba Wind Power Plant, which entered service in 2009 and has five 1,990 kW
turbines.
Looking beyond wind power generation, we plan to investigate biomass power generation (which has a
high capacity factor), abundant photovoltaic power, and other renewable power sources to continue our
contribution to the creation of a low carbon society.
Yuza Wind Power Plant
Tokyo Gas Group operates district heating and cooling plants (including smallscale spot heat supply
centers) in 43 districts. Steam and heated and chilled water are produced by various natural gas systems,
including gas cogeneration systems, absorption chillers, and boilers, and are supplied within specific areas.
To increase energy efficiency, we are working to finetune operation of these facilities and make them more
efficient.
Makuhari District Heating and Cooling Center
We are upgrading the Makuhari District Heating and Cooling Center's heat source equipment in order to
transform the facility from a conventional district heating and cooling center that simply supplies heat into a
"community energy center" that also generates electricity in order to help conserve energy and reduce CO
emissions throughout the area as a whole. Using the latest highefficiency largescale gas engine
cogeneration system (with a total capacity of 15.7 MW), electric turbo chiller, boiler, and absorption chiller,
we have achieved the "best mix" of heat and power supply systems, resulting in a 24% reduction in fuel
consumption and a 24 thousand ton reduction in CO emissions.
Initiatives at the Makuhari District Heating and Cooling Center
2
2
Schematic of Makuhari District Heating and Cooling Center
Only when demand cannot be met by the cogeneration system.✽
DHC service to Makuhari Shintoshin area
We are making our offices more energy efficient in both tangible and intangible ways. Even as we are
making tangible changes like installing gas cogeneration systems (gas CGS) and highefficiency lighting
equipment, we are also taking less tangible steps to conserve energy by encouraging our employees to
adopt "cool biz" and "warm biz" dress appropriate to the seasons, maintaining room temperatures at more
appropriate levels, and generally raising employee energy awareness and ensuring that equipment is used
in more energy efficient ways.
Tokyo Gas has long been interested in saving energy at our offices. We equipped our Hamamatsucho
Head Office Building with its first gas cogeneration system as far back as 1984, and upgraded it in fiscal
2008 to take advantage of the latest cogeneration technology,✽ with the new system entering operation in
April 2009. As a result, our head office building CO emissions have been cut by some 1,400 tons annually.
When allout efforts were needed to save power during the summer of 2011 following the Great East Japan
Earthquake, all the Group's gas CGSs were put to work and achieved significant power savings.
In fiscal 2010, Tokyo Gas introduced a set of design guidelines for buildings that call attention to improving
energy conservation, seismic safety, and building lifespans. The new guidelines have been incorporated
into improvement plans for buildings owned by Tokyo Gas Group.
We are installing more efficient lighting and airconditioning equipment at our offices and facilities, focusing
on those where the greatest energy savings can be achieved. On the lighting front, we are installing high
efficiency LED and HFballast fluorescent lighting. Significant savings have also been achieved in recent
years by using LED lights instead of mercury lights for outdoor lighting and in the experimental area at the
Senju Techno Station's B Block.
Paying particular attention to buildings' outer skins, we retrofitted a number of the windows in our
Hamamatsu Head Office Building with double glazing in fiscal 2013.
Effective Use of Energy by Gas Cogeneration Systems
2
Upgraded gas CGS: 930 kWclass gas engines x 2, total efficiency of 72% (38% power generation, 32% waste heat capture)✽
Making Old Buildings Both Energy Efficient and EnvironmentallyFriendly
Saving Energy by Improving Facilities
Tokyo Gas is working with the owners of the buildings it occupies, their facility managers, and the specific
departments that are tenants in these buildings to implement effective ways of saving energy. These
measures include the establishment of energy conservation committees, management of lighting levels,
and maintenance of humidity and temperature at appropriate levels.
Since fiscal 2014, we have also been installing displays in some of our buildings to make it easier to
visualize energy usage and raise awareness of energy conservation.
Raising energy conservation awareness through "visualization"
A display panel has been installed in the foyer of our Hamamatsucho Head Office Building to present visual
data on actual electricity usage and information on energy conservation. Meanwhile, our HonChiba
Building is supplying online data on energy usage provided by the RakuSho (Easy Conservation) BEMS
service, along with analyses of the results, to other Tokyo Gas offices.
A display has also been installed at our recently retrofitted Hiranuma Building, and we are refining the
content presented to reflect the results of questionnaire surveys of users there and at our head office and
HonChiba buildings.
Alongside these ongoing activities, we also organize a powersaving campaign every summer to
encourage employees to save electricity. In fiscal 2015, the campaign slogan was "Little Changes Lead to
Summer Power Savings," and the result was a 1% reduction from a year earlier in electricity usage at our
office buildings.
Motion sensitive lighting Fluorescent LED lighting
Saving Energy by Improving Use
Data visualization at our head office building Summer powersaving campaign
Ecodriving information (such as information on avoiding idling) is provided to employees by instructors and
through our intranet and other channels. We also offer ecodriving courses, and studies of fuel consumption
before and after taking these courses shows that drivers become at least 10% more fuel efficient.
Introduction of fuel cell vehicles
We are adopting the use of lowemission and fuelefficient vehicles in order to reduce nitrogen
oxides (NOx), particulate matter (PM), and CO emissions produced when driving. In fiscal 2014 we
introduced two fuel cell vehicles.
Promotion of EcoDriving
Explaining the keys to ecodriving
2
Green Procurement of Energy
The Green Power Certificate System is a system for turning electricity generation using natural energy
sources (such as biomass and wind power) into "environmental value" that can be traded in the form of
"green power certificates" in order to promote wider adoption of natural energy sources, energy
conservation, and reductions in CO emissions. We have purchased green wind power certificates from the
Japan Natural Energy Company Limited since April 2002, and allocate them to our corporate museums and
offices. We are making a positive contribution to the fight against global warming at the local level as well,
and since April 2007 have been a "YokohamaGreen Partner" in Yokohama's Hama Wing wind power
project.
Carbon offsetting partner for the G7 IseShima Summit and Intercity Baseball Tournament
Tokyo Gas uses reductions in greenhouse gas emissions accredited under the JCredit Scheme✽1
administered by the Japanese government to offset carbon emissions✽2 from events within and
outside the company in order to better contribute to the environment. For example, we provided 100
tons of JCredits for the G7 IseShima Summit in May 2016,✽3 and 250 tons for Japan's annual
Intercity Baseball Tournament in July.
2
Green Power Purchases and Use in FY2015
Facilities using green power Electricity (kWh)
Gas Science Museum 132,000
Earth Port (Tokyo Gas Kohoku New Town Building) 112,000
Hiranuma Building 112,000
Yokohama Showroom 94,000
Yokohama Service Branch 38,576
Ohgishima Power 1,000
CSR Report 2015 (Japanese and English print editions) 3,400
The Ultra Energy Saving Handbook (print edition) 600
Tokyo Gas buildings, Tokyo Gas Senju property (Tokyo specified antiglobalwarming facility)
450,000
Total 943,576
This is a program by which reductions and sequestrations of greenhouse gases such as CO achieved by, forexample, forest management and installing energysaving equipment are certified by the government as "credits."Credits created under this scheme can be used in various ways, including to attain targets set by commitments forachieving a low carbon society and to offset carbon emissions.
✽1 2
For the IseShima Summit held in Mie Prefecture on May 2627, 2016, the Ministry of Economy, Trade andIndustry, the Ministry of the Environment, and the Ministry of Agriculture, Forestry and Fisheries (which together runthe JCredit program) partnered with the Ministry of Foreign Affairs to enable the buying and selling of carbonoffsets by the public and private sectors through the JCredit Scheme and related arrangements. Enterprises andlocal governments were invited to take part in the project. This publicprivate partnership on carbon offsettingdemonstrated to the international community Japan's positive commitment to tackling climate change, and alsocontributed to fostering public understanding of and involvement in action against climate change in Japan.
✽2
Once CO emissions at the Summit have been confirmed, offset credits up to the amount offered by each companywill be finalized.
✽3 2
Nagano Tokyo Gas Forest was opened in Kitasakugun, Nagano Prefecture, by Tokyo Gas as a means of
engaging in forest development and conservation activities in order to contribute to the fight against global
warming in fulfillment of its duties as an energy supplier. The forest celebrated its 10th anniversary in 2015,
and in the 10 years since its inception some 300,000 saplings have been planted and 40,000 thinned out to
promote forest regeneration. The plan for the future is to clearly quantify how much CO the forest
sequestrates so that this can be offset against emissions from other business activities using the JCredit
Scheme in order to promote conservation activities.
In addition, we are supporting the preservation and expansion of precious green space in the Group's
service areas through the Tokyo Gas Tree Planting Project.
Nagano Tokyo Gas Forest administration building, a mountain lodge called Ohisama House Trees are thinned, pruned, and otherwise maintained to conserve the forest, while the forest'sadministration building, a mountain lodge called Ohisama House, has been designed to makemaximum use of natural energy sources (such as wind, sun, and water to generate power and a pelletstove for heating).
Tokyo Gas Tree Planting Project Trees have been planted along a section ofTokyo Metropolitan Route 306 (Oji Senju Minamisunamachi) through a donation to the "My Tree"program organized as part of the TokyoMetropolitan Government's Green TokyoFundraising Campaign.
2
Practicing the 3Rs (reduce, reuse, and recycle) is essential to creating a resourcesaving society. The most
important of these is controlling the generation of waste.
In addition to limiting emissions by, for example, producing zero emissions at production plants (defined as
a final disposal rate of less than 0.1%) and reducing the amount of soil excavated during gas pipeline
construction, Tokyo Gas Group practices the 3Rs at every stage of its business activities, including reusing
gas meters and recycling used gas pipes and gas appliances, in order to recycle and reuse waste and
other resources.
Tokyo Gas Group is working to achieve zero waste emissions (defined as a final disposal rate of less than
0.1%) at not only its city gas production facilities, but also at power plants, gas appliance factories, district
heating and cooling centers, and plants making products such as systems that use the cold energy of LNG.
In fiscal 2015, total waste emissions came to 1,291 tons, the amount disposed of by landfill was 18 tons,
and the final disposal rate was 1.3%.✽
The Group generates waste (mostly construction rubble and sludge, scrap metal, and wood chips) as a
result of activities performed under direct contract for gas utilities (such as the construction of gas facilities),
gas pipeline work at customers’ sites, installation of air conditioning, space heating, and water heating
systems, and home improvement work. In fiscal 2015 we generated 144,594 tons of waste, 96% of which
was recycled.
Tackling Waste Emissions from Production Facilities
Excluding asbestos and other nonrecyclable industrial waste.✽
Tackling Waste Emissions from Construction Work
We pursue a range of activities in the gas supply field to contribute to the development of a resource saving
society. These include 3R activities to deal with emissions of byproducts during gas pipeline work, and the
reuse and recycling of gas meters.
Roads must be dug up when gas pipelines are laid, producing emissions of excavated (residual) soil and
asphalt concrete lumps. The Group takes a "3R" approach (reuse, reduce, and recycle) to decreasing the
amount of excavated soil by, for example, shallowlaying of pipes in narrow trenches and use of nonopen
cut construction methods, as well as by reburying excavated soil and making increased use of improved
soil and recycled road surface materials. When it is necessary to reexcavate the same location, we are
using a new kind of temporary backfill called "Ecoballs," and wider use is being made of other newly
developed materials and construction methods as well. In fiscal 2015, 1.00 million tons of excavated soil
was disposed of, which is 22.3% of the 4.49 million tons (estimated baseline disposal) that would have had
to be disposed of had conventional methods been used. As a result, our use of trucks to transport
excavated soil was also reduced, cutting CO and NOx emissions.
Trend in Reduction in Emissions of Excavated Soil Relative to Estimated Baseline
Reuse, Reduction, and Recycling of Excavated Soil
2
Ecoball temporary backfill Pipeline work using Ecoballs
Increased recycling of used gas pipes removed when pipes were replaced enabled us to once again
achieve a 100% recycling rate in fiscal 2015. We established a system for recycling polyethylene (PE)
pipe✽ scrap and excavated sections of pipes in fiscal 1994, and in fiscal 2015 recycled a total of 235 tons
as raw materials for use in the gas business and for making stationery. In the gas business, these materials
are used to make items such as labels for customers' gas meters explaining how to restart the meters after
an emergency. Regarding steel and castiron pipes, we collected a total of 5,003 tons in fiscal 2015, and
the entire amount was recycled as raw materials for use by electric furnace manufacturers and other users.
Used PE Gas Pipe Recycling Process
Tokyo Gas has led the gas industry, and other industries, in its reuse of gas meters ever since it first began
installing them.
The gas meters installed at customers' sites are replaced before their certified life (normally 10 years)
expires. We collect the removed meters, replace all expendable parts, and recertify them, allowing them to
be used for three cycles (30 years) in total. All replaceable parts have been assessed for durability and
design changes made where necessary, with the result that now almost all reusable parts are reused. In
Recycling of Used Gas Pipes
PE gas pipes are highly earthquake and corrosion resistant, and were rapidly adopted following the Great HanshinAwajiEarthquake.
✽
Gas Meter Reuse and Recycling
fiscal 2015, 553 thousand (46%) of the 1,215 thousand meters newly installed were reused, enabling us to
reduce the amount of waste generated by 2,302 tons.
Meters that have completed three cycles are recycled through our own recycling channels and used as
material for new products by electric furnace manufacturers and other companies.
Steps in Reuse of Gas Meters
Gas meter
Tokyo Gas Groups' offices and other facilities produce all kinds of industrial waste, including waste plastic
from containers and packaging and waste generated in the course of developing technologies, providing
education and practical training, and performing maintenance work at customers' sites. The Group strictly
sorts and stores waste, which it then ensures is recycled or properly disposed of. In fiscal 2015, our offices
and other facilities produced a total of 3,431 tons of industrial waste (85% of which was recycled). We fell
short of the target set in our Resource Recycling Guidelines (revised in fiscal 2014), and we will redouble
our recycling efforts to meet this goal.
Our offices are working to reduce their consumption of copy paper, cut emissions of waste paper, and
recycle more used paper. Following the attainment of a 95% waste paper recycling rate by the Group as a
whole in fiscal 2013, our Environmental Protection Guidelines were revised in fiscal 2014 to expand the
scope of waste management to cover general waste (such as food waste) so as to increase our rate of
recycling of waste other than waste paper. As a result, the Group as a whole produced only 3,143 tons of
general waste in fiscal 2015, meeting its target with a recycling rate of 78%.
Paper Recycling by Tokyo Gas
In fiscal 2003, Tokyo Gas launched a program to collect old documents and waste paper and have them
turned into recycled paper for our own use. In fiscal 2015, we purchased 537 tons of paper that had been
recycled in this way, and used it to produce sales pamphlets, leaflets, calendars, reports, and other
literature. Unlike ordinary recycled paper, the paper that we use —which we call "Tokyo Gas Recycled
Paper"— is made from materials both provided (i.e. waste generated) and then purchased back by us. This
independent program observes green purchasing practices and is designed to promote the "greening" of
the paper product chain. We work with a wide range of companies at every stage of the paper product
lifecycle, including waste paper haulers, waste paper wholesalers, paper wholesalers, and paper
manufacturers at the waste paper distribution through to the recycled paper production stages, and
production companies and printing firms at the printing stage. Internally as well, all of our employees
carefully separate waste to make it possible for us to provide highquality waste paper for recycling.
Tokyo Gas Recycled Paper is certified to be made from legally sourced lumber that has been traced from
the felling stage.
In the case of printed materials that cannot be made from Tokyo Gas Recycled Paper, we support the use
of sustainable forest resources by recommending the use of FSCcertified paper in order to ensure that it
has been sourced in an environmentally friendly manner (by, for example, paying attention to forest
conservation).
Tackling Waste Emissions at Offices
Careful sorting of wastepaper Collected waste paper
How Tokyo Gas Waste Paper is Recycled
We promote the reduction, reuse, and recycling of materials at customers' sites in a variety of ways. These
include reducing waste emissions by making our products more environmentally friendly from the design
stage, and collecting used appliances and parts via our own collection channels.
Since August 1994, Tokyo Gas has operated its own waste collection and recycling system, called the
Saving & Recycling Innovative Model System (SRIMS). This system enables us to reduce the impact on
the environment and cut costs by collecting waste at the same time we deliver gas appliances, parts, and
piping materials to partner companies. Under SRIMS, we are working to collect used gas appliances and
waste materials produced when equipment is replaced or gas installation or renovation work is carried out
at customers' sites.
In fiscal 2015, we collected 8,936 tons of waste and recycled 8,367 tons.
Tokyo Gasbranded residential gas air conditioners and clothes dryers are subject to the Act on Recycling
of Specified Kinds of Home Appliances ("Home Appliances Recycling Act"). They are therefore collected
and recycled by a consortium of companies (known as the "A Group") led by Panasonic Corporation and
Toshiba Corporation.
In terms of gross weight, 90% of our air conditioners and 88% of our clothes dryers were recycled in fiscal
2015 (exceeding the respective legal minimums of 80% and 82%).
SRIMS for Used Gas Appliances, Etc.
How SRIMS Works
Action under the Act on Recycling of Specified Kinds of Home Appliances
Corrugated cardboard boxesdesigned to use less cushioning
Shrink wrap packaging Returnable containers
In order to reduce emissions of waste containers and packaging at customers' sites, we meticulously
collect unwanted containers and packaging generated when gas appliances are sold and installed by our
partners.
Containers and packaging collected from customers' sites are recycled mainly via SRIMS. In fiscal 2015,
approximately 697 tons of corrugated cardboard and 13 tons of expanded polystyrene were collected and
recycled in their entirety. We are also reducing the quantity of containers and packaging used for gas
appliances in several ways. These include reducing the amount of cushioning required by redesigning
corrugated cardboard packaging, using less corrugated cardboard by employing shrink wrap packaging,
and using returnable packaging (tops and bottoms that can be collected and reused).
Action under the Home Appliances Recycling Act
UnitFY2015
Air conditioners Clothes dryers
Number received at designated collection points Number 14,863 6,710
Number transported to processing plants Number 14,862 6,707
Recycling Number recycled Number 14,824 6,649
Weight undergoing recycling Tons 615 258
Weight post recycling Tons 559 228
Recycling rate % 90 88
Fluorocarbons Weight recovered kg 9,646
Weight destroyed kg 2,238
In addition, specified residential waste appliances collected from customers by partner retailers are
properly transported to specified collection points in accordance with our Saving & Recycling Innovative
Model System (SRIMS).
Reduction of Waste Containers and Packaging
Biodiversity Conservation and Sustainable Use
Many species are facing imminent extinction due to human activities, and natural ecosystems around the
world are being disrupted at an alarming rate. Tokyo Gas Group considers the realization of rich
ecosystems to be one of our important business bases in order to protect the global environment while
sustaining our business, and has formulated its Guidelines for Promoting Biodiversity Conservation.
Specifically, we are monitoring conditions along each value chain to mitigate their impact on ecosystems,
practicing forest conservation at our own Nagano Tokyo Gas Forest, and engaging in a variety of other
initiatives.
In fiscal 2016, we added an item on biodiversity conservation to our Environmental Policies, and we will be
both ramping up our efforts in this area and adopting a more global approach to protecting biodiversity as
our own business activities become more globalized.
Impacts on biodiversity and responses along LNG value chain (PDF: 895KB)
We are monitoring conditions and working to conserve biodiversity at every stage of our value chains, from
procurement of natural gas to transportation, production, and supply.
Efforts being made at the site of procurement
The companies from whom we procure LNG (liquefied natural gas) are taking a variety of measures to
protect biodiversity in their gas fields, including protection of endangered wildlife, forest conservation,
afforestation, and protection of marine life. In the case of our LNG project in Indonesia, for example, action
is being taken to protect an endangered species of painted terrapin called the Sea Tuntung and a
mangrove restoration program is also underway.
Immature Sea Tuntung terrapins(Source: KOMPAS.COMPertamina dan YSCLI Selamatkan Tuntong Laut dari Kepunahan)
At our LNG projects in Australia, we are implementing Significant Species Management Plans (SSMPs) to
identify the potential impacts on endangered and near threatened animals, plants, and biocommunities
affected by projects. Under these plans, we not only identify the processes that may have an impact, but
also report on appropriate control methods and mitigation responses in the case that impacts exceed
regulatory limits.
Making LNG transportation more environmentally friendly
Concerns have been raised about the possible impact on ecosystems of aquatic organisms contained in
the ballast water (seawater used to provide additional weight when a vessel is not fully laden) discharged
by vessels at ports when they are loaded with LNG.
Tokyo Gas carriers therefore exchange their ballast water on the open seas to reduce the impact on local
ecosystems.
Procurement
LNG carrier Hard clams not previously found in Japanesewaters
We are creating more green space at our LNG terminals at Sodegaura, Negishi, and Ohgishima by
allowing vegetation in grassy areas to grow more and cutting back on our use of herbicides.
We aim to create green areas that blend with the local natural habitat, and to achieve this the Jumoku
Kankyo Network Society (NPO) has been helping us survey local plants, insects, and animal life. The
results of these surveys are then used to improve our conservation activities in these locations.
Production
Greenification is being promoted at each of theLNG terminals at Sodegaura, Negishi, andOhgishima. (Photo of Negishi LNG Terminal)
Planting activity at one of our terminals. Thetrees are planted by the employees themselves.
Greenification activities at LNG terminals
We are reducing the amount of excavated (residual) soil produced by gas pipeline laying work. For
example, we lay pipes in shallower, narrower trenches than used to be the norm, and use nonopen cut
construction (a method of laying pipelines without digging up road surfaces).
Holes are conventionally refilled using pit sand. We have reduced the excavation of pit sand by, for
example, refilling holes with the soil that was excavated from them, using improved soil and recycled road
surface materials as refilling materials, and using a new type of backfill to temporarily refill holes that will be
soon be excavated again.
The animal, insect, and plant life at our terminalsis surveyed with the assistance of the JumokuKankyo Network Society (NPO).
A wide variety of bird species have been found ingreen areas at our LNG terminals. Surveys haveshown the dusky thrush to be a common wintervisitor.
Ecosystem surveys of LNG terminals
Supply
Pipeline construction using nonopencut methods
The amount of soil excavated is reduced by a method that allows gaspipes to be laid without digging up road surfaces. (The photo shows ashaft through which gas pipes are thrust into place)
We are planting trees on rooftops and creating "green curtains" at our offices and corporate museums.
Pipeline construction using "Ecoballs," a new type of temporary backfill
Pit sand use is reduced by employing a new kind of temporary backfillcalled "Ecoballs" to refill holes that will soon be excavated again.
Recycling Excavated Soil
Soil generated from gas pipeline work (excavated soil) is processed at thesoil improvement center, and reused as refilling soil. This helps to protectthe ecosystems of mountains and other environments.
Offices
Rooftop greenification at the Gas Science Museum
The museum is used to promote effectivecommunication with customers and localcommunities, including their elementary schools.
Green curtain of bitter gourd plants at the Kumagaya Building
At our Kumagaya Building, greenery is grown on the walls and outside windows to provide shade andkeep rooms cooler.
We protect woodland at Nagano Tokyo Gas Forest (opened in 2005) and conserve biodiversity through
projects undertaken in partnership with our customers such as the Donguri (Acorn) Project and the "My
Forest" Project. We also support biodiversity conservation groups through the Tokyo Gas Environment
Support Fund and our involvement in the Keidanren Committee on Nature Conservation.
Conservation of biodiversity at Nagano Tokyo Gas Forest
We engage in ongoing forest conservation work, including thinning and pruning, in order to contribute to the
environment and prevent global warming by developing woodlands. Work is performed in collaboration with
the local Saku Forestry Association, and we also carry out other activities such as thinning as part of our
outdoor nature education program. In order to help conserve biodiversity, we are supplementing the
coniferous trees that make up most of the forest by planting broadleaved trees, as these can provide more
accessible food sources for bird, mammal, and insect life. We are also working in partnership with local
NPOs to conduct flora and fauna surveys of the forest.
Timeline of Flora and Fauna Surveys
Survey year Survey details
2007 Mammal fauna survey (confirmed presence of 16 species of mammals)
2008 Flora survey (confirmed presence of 324 species of plants)
2009 Ornithological survey (confirmed presence of 61 species of birds)
2010 Dietary analysis of Japanese marten from fecal remains
2011 Stationary camera survey (confirmed presence of 30 species of wildlife)
2012 Stationary camera survey (confirmed presence of 29 species of wildlife)
2013 Stationary camera survey (confirmed presence of 21 species of wildlife)
2014 Stationary camera survey (confirmed presence of 20 species of wildlife)
2015 Stationary camera survey (confirmed presence of 25 species of wildlife)
Iris sanguinea Japanese primrose
Japanese badger Family of weasels
Changes in Animals Recorded between 2007 and 2015
Owl bathing Hare
We monitor and manage impacts on the environment at every stage of our LNG value chain in order toreduce the impact on the environment.
Tokyo Gas Group Business Activities and Material Balance (FY2015)
Companies included in the data: Tokyo Gas and its 46 consolidated subsidiaries in Japan.(PDF: 24KB)
Tokyo Gas Group Business Activities and Material Balance (PDF: 152KB)
For city gas production by the Tokyo Gas Group.✽1
Energy usage by the Tokyo Gas Group excluding doublecounting due to intragroup supply of heat and electricity.✽2
City gas : Volume of gas sales by the Tokyo Gas Group excluding supply to other gas utilities. Wholesale supply : Volume of gas supplied to other gas utilities. Heat: Includes sales from LNG terminals as well as district heating and cooling center and spot heat supply. Includes intragroup supply. Electric power: Volume of sales of all electric power, including power purchased for business use from other companies andthe market as well as Group power stations.
✽3
CO , CH , NOx: Excludes doublecounting due to intragroup supply. Volume of wastewater: Specified wastewater and domestic sewage.
✽4 2 4
PE pipes, Steel and castiron pipes: Tokyo Gas on a nonconsolidated basis.✽5, 6Gas sales volume according to consolidated financial statements multiplied by emission intensity.✽7
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
Number of Customers (Note)
thousands 10,855 10,978 11,111 11,263 11,398
Number of ConsolidatedSubsidiaries
companies53 51 51 49 46
Feedstock and Production
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
City gasfeedstock (Note 1)
FeedstockLNG
thousandtons
10,531 10,760 11,057 11,513 11,411
FeedstockLPG
thousandtons
321 368 418 441 438
Production City gassales (Note 2)
millionm 14,160 14,211 14,527 15,358 15,263
Heatsales (Note 3)
TJ3,282 3,282 3,353 3,287 3,251
Powersales (Note 4)
billionkWh 8.27 9.98 9.71 10.61 10.96
Companies included in the data (Tokyo Gas and ConsolidatedSubsidiaries) ✽Companies included in the data.(PDF:24KB)
Number of customers of Tokyo Gas and its consolidated subsidiaries in Japan.Note:
Usage of Energy & Water / Emissions into the Atmosphere & WaterSystems
3
Energy Usage ✽1,2
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
Energyusage
(Note 1) TJ 56,245 62,565 60,457 66,399 68,561
LNG terminals TJ 3,789 3,818 3,894 4,069 3,998
District heatingand coolingcenters
TJ4,559 4,513 4,361 4,167 4,167
Power plants TJ 45,289 51,745 49,733 55,639 57,871
Tokyo Gasbusiness offices,etc.
TJ1,494 1,469 1,453 1,417 1,387
Other groupcompanies
TJ1,681 1,536 1,541 1,490 1,460
(Tokyo Gas non-consolidated)
TJ5,588 5,586 5,638 5,785 5,678
Electricpower (Note 2)
MWh 543,186 542,724 545,218 593,097 615,419
LNG terminals MWh 289,115 298,742 304,788 334,229 345,227
District heatingand coolingcenters
MWh72,585 76,975 76,446 90,973 94,640
Power plants MWh 16,055 13,263 10,732 8,774 11,407
Tokyo Gasbusiness offices,etc.
MWh55,405 55,022 54,499 52,350 52,372
Other groupcompanies
MWh131,163 118,785 118,673 115,677 112,890
(Tokyo Gas non-consolidated)
MWh350,876 359,707 364,971 391,536 402,357
City gas thousandm3
1,177,796 1,324,428 1,275,444 1,402,022 1,447,012
LNG terminals thousand22,496 20,978 21,378 18,769 14,600
For city gas production by Tokyo Gas Group.Note 1:Volume of gas sales by Tokyo Gas Group including supply to other gas utilities.Note 2:Includes sales volume from LNG terminals, in addition to district heating and cooling center and spot heat supply. Alsoincludes intra-group supply.
Note 3:
Volume of sales of all electric power, including power purchased for business use from other companies and the marketas well as Group power stations.
Note 4:
m
District heatingand coolingcenters
thousandm3 87,713 85,647 82,570 74,482 73,328
Power plants thousandm3
1,047,873 1,198,427 1,152,267 1,289,852 1,341,099
Tokyo Gasbusiness offices,etc.
thousandm3 17,699 17,149 16,900 16,726 15,969
Other groupcompanies
thousandm3
2,015 2,228 2,328 2,192 2,015
(Tokyo Gas non-consolidated)
thousandm3
45,630 43,542 43,837 40,994 35,990
Heat (Note 2)
TJ 25 24 31 38 48
District heatingand coolingcenters
TJ105 104 176 203 198
Tokyo Gasbusiness offices,etc.
TJ86 88 89 85 88
Other groupcompanies
TJ205 165 167 158 166
(Tokyo Gas non-consolidated)
TJ102 102 99 94 96
Otherfuels
TJ 4.89 4.62 5.40 5.23 5.80
LNG terminals TJ 0.17 0.18 0.18 0.22 0.68
Tokyo Gasbusiness offices,etc.
TJ0.66 0.29 0.64 0.64 0.60
Other groupcompanies
TJ4.06 4.15 4.59 4.37 4.52
(Tokyo Gas non-consolidated)
TJ0.83 0.81 0.85 0.86 1.28
Fuel forvehicles
Gasoline kL 3,449 3,634 3,571 3,282 3,219
(Tokyo Gas non-consolidated)
kL1,465 1,494 1,461 1,425 1,444
Diesel oil kL 206 243 228 219 208
(Tokyo Gas non-consolidated)
kL35 36 37 35 41
City gas thousandm3
297 237 218 203 175
(Tokyo Gas non-consolidated)
thousandm3
257 201 185 172 142
LPG kL 273 274 295 280 220
(Tokyo Gas non-consolidated)
kL― ― ― ― ―
LNGcryogenicenergy
thousandtons
2,504 2,487 2,659 2,289 2,364
Cryogenic power thousand
3
generation tons816 696 796 460 724
Portion sent tosubsidiaries andaffiliates
thousandtons 769 818 821 853 852
BOG treatment,etc.
thousandtons
918 973 1,042 976 788
Water Usage
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
Tap waterandindustrialwater
thousandm3
5,273 5,647 6,023 5,751 5,421
LNG terminals thousandm3
1,271 1,460 1,542 1,662 1,457
District heatingand coolingcenters
thousandm3 1,628 1,711 1,597 1,439 1,459
Power plants thousandm3
1,437 1,504 1,890 1,703 1,569
Tokyo Gasbusinessoffices, etc.
thousandm3 554 595 607 572 537
Other groupcompanies
thousandm3
383 376 387 375 399
(Tokyo Gasnon-consolidated)
thousandm3 1,880 2,111 2,192 2,276 2,036
Seawater LNG terminals thousandm3
765,369 791,092 795,227 784,406 773,963
Excludes double counting by intra-group supply of heat and electricity.Note 1:Excludes double counting by intra-group supply.Note 2:
Emissions into the Atmosphere
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
Greenhousegas
CO2
✽1,3
(Note 1) thousandtons ofCO2
2,795 3,154 3,074 3,376 3,479
LNGterminals (Note 2)
thousandtons ofCO2
160 180 200 210 202
Districtheating andcoolingcenters (Note 3)
thousandtons ofCO2 231 225 223 213 211
Power plants
(Note 4)
thousandtons ofCO2
2,297 2,627 2,522 2,823 2,938
Tokyo Gasbusinessoffices, etc. (Note 5)
thousandtons ofCO2
71 72 75 73 71
Other groupcompanies (Note 6)
thousandtons ofCO2
75 76 81 77 75
(Tokyo Gasnon-consolidated)
(Note 7)
thousandtons ofCO2 246 268 290 298 288
CH4 (Note 8) thousandtons ofCO2
equivalent
3 3 4 6 14
NOx tons 290 264 272 272 302
LNGterminals (Note 9)
tons13 12 14 14 11
Districtheating andcoolingcenters
tons
61 62 59 53 52
Power plants tons 200 175 182 187 223
Tokyo Gasbusinessoffices, etc. (Note 9)
tons
16 16 17 18 15
(Tokyo Gasnon-consolidated)
tons30 29 32 32 28
Greenhouse Gas Emissions from Feedstock Procurement (Scope 3)
Category Unit FY2012 FY2013 FY2014 FY2015
LNG procured milliontons
12.71 12.80 13.97 13.87
Greenhouse gas (CO2
equivalent) (Note)Extraction million
tons ofCO2
0.56 0.57 0.62 0.58
Liquefaction milliontons ofCO2
5.80 5.84 6.38 5.08
Marinetransport
milliontons ofCO2
1.37 1.38 1.50 1.12
Excludes double counting by intra-group supply. Totaling 3,490 thousand tons (based on adjusted emission factors) forthe Tokyo Gas Group overall.
Note 1:
200 (based on adjusted emission factors)Note 2:210 (based on adjusted emission factors)Note 3:2,938 (based on adjusted emission factors)Note 4:71 (based on adjusted emission factors)Note 5:74 (based on adjusted emission factors)Note 6:286 (based on adjusted emission factors)Note 7:About 570 tons of CH emissionsNote 8: 4
Emissions from facilities that generate soot and smoke specified in the Air Pollution Control Act.Note 9:
Calculated based on greenhouse gas emission intensity throughout the lifecycle, from extraction of natural gas toprocessing and transportation, as analyzed by the LCA approach.
Note:
FY2012-14 emission intensityExtraction: 0.81 / Liquefaction: 8.36 / Transportation by sea: 1.97 g-CO /MJ, based on gross heating value Source: "Future Forecast for Life Cycle Greenhouse Gas Emissions of LNG and City Gas Type 13A" (Energy and Resources, Volume 28, No. 2, March 2007).FY2015 emission intensity Extraction: 0.77 / Liquefaction: 6.71 / Transportation by sea: 1.48 g-CO2/MJ, based on gross heating value Source: "Study of Life Cycle Greenhouse Gas Emissions of LNG and City Gas 13A" (35th Annual Meeting of the JapanSociety of Energy and Resources, June 2016).
CO2 Emissions and Emissions Reduction at Customers´ Sites
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
CO2 Total amount million tons ofCO2
26.94 27.09 27.67 29.36 28.96
Amount ofreduction relative toFY2011
million tons ofCO2
Base 0.87 1.52 3.29 3.43
Energy Usage and CO Emissions Associated with Cargo Transportation (for Tokyo Gas on aNon-Consolidated Basis) (Scope 3)
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
Transportation amount million tons-km
82.91 81.32 93.12 94.59 98.42
Energy usage (crude oilequivalent)
kL3,172 3,109 3,258 3,275 3,354
Energy usage intensity kl/milliontons-km
38.3 38.2 35.0 34.6 34.1
CO emissions tons-CO 8,368 8,181 8,576 8,615 8,810
Emissions into Water Systems
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
Wastewater thousandm3
1,187 1,154 1,106 1,116 1,091
LNG terminals (Note 1)
thousandm3
372 274 242 265 287
District heatingand coolingcenters
thousandm3 361 398 321 325 330
Power plants thousandm3
454 483 544 525 474
(Tokyo Gasnon-consolidated)
thousandm 381 284 249 273 296
COD tons 1.7 1.7 1.9 1.9 1.6
LNG terminals tons 1.3 1.4 1.2 1.2 1.2
Power plants tons 0.3 0.3 0.6 0.6 0.5
(Tokyo Gasnon-consolidated)
tons1.3 1.4 1.2 1.2 1.2
2
2
2 2
3
Conversion Factor, etc.
CO2 Emission Factor
Category Unit FY 2011
FY 2012
FY 2013
FY 2014
FY 2015
City gas (Tokyo Gas 13A) (Note 1)
kg-CO2/m3
2.21
Purchased electricity (average of all powersources) (Note 2)
kg-CO2/kWh
0.384etc.
0.464etc.
0.525etc.
0.530etc.
0.505etc.
Heat (Note 3)
Steam (excluding industrial use),hot water, cold water
kg-CO2/MJ
0.057
Industrial steam kg-CO2/MJ
0.060
Other fuels (Note 3)
Heavy oil A kg-CO2/L 2.71
Diesel kg-CO2/L 2.58
Kerosene kg-CO2/L 2.49
Gasoline kg-CO2/L 2.32
LPG kg-CO2/kg
3.00
Unit Calorific Value
Category Unit FY 2011
FY 2012
FY 2013
FY 2014
FY 2015
City gas (Tokyo Gas 13A) (Note 1)
MJ/m3N 45.00
Data is for wastewater discharges from wastewater treatment facilities and sewage discharges.Note:
Calculated based on the typical composition of city gas (type 13A) supplied by Tokyo Gas (15°C, gauge pressure of 2kPa).
Note 1:
Emission factors from electric power companies, released in accordance with the ministerial ordinance stipulated by theAct on Promotion of Global Warming Countermeasures.
Note 2:
Calculated using the unit calorific value released in accordance with the ministerial ordinance stipulated by the Act onPromotion of Global Warming Countermeasures, and multiplying this amount by the emission factor per unit calorificvalue and by 44/12.
Note 3:
Purchasedelectricity (Note 2) ✽4
Daytime electricity MJ/kWh 9.97
Nighttime electricity MJ/kWh 9.28
Other than general electricityutilities
MJ/kWh9.76
Heat (Note 2)
Steam (excluding industrial use),hot water, cold water
MJ/MJ1.36
Industrial steam MJ/MJ 1.02
Other fuels (Note 2)
Heavy oil A MJ/L 39.1
Diesel MJ/L 37.7
Kerosene MJ/L 36.7
Gasoline MJ/L 34.6
LPG MJ/kg 50.8
Crude oil equivalent coefficient (Note 2)
kL/GJ 0.0258
City gas calorific value of Tokyo Gas (0°C, 1 atmospheric pressure)Note 1:Act Concerning the Rational Use of Energy (the Energy Efficiency Act)Note 2:
For district heating and cooling centers that sell power using Combined Heat and Power (cogeneration), the amount ofenergy usage is divided between those for heat production and those for power generation using the allocation factorcalculated based on the Act on Promotion of Global Warming Countermeasures. Data for energy used to produce heat isreflected in "District heating and cooling centers," and data for energy used for power generation is reflected in "Powerplants." Data for "Tokyo Gas business offices, etc." does not include energy used for LNG terminals and district heating andcooling centers. "Other group companies" refers to data on group companies excluding district heating and cooling centers,and power plants.
✽1
Some variance in the data listed under different categories may exist since the data has been processed to properly assessthe changes in energy usage intensity for each business activity (such as by reflecting the amounts commissioned by othercompanies at LNG terminals).
✽2
CH (methane) emissions were converted to CO emissions by multiplying by the global warming potential of 25, asstipulated in the Act on Promotion of Global Warming Countermeasures.
✽3 4 2
For the crude oil equivalent of electricity usage under "District heating and cooling centers" and "Tokyo Gas businessoffices, etc.," the amounts purchased from power utility companies were all calculated using daytime electricity factors.
✽4
Industrial Waste ✽1
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
Industrial waste✽2 Generation tons 118,733 117,832 122,705 130,193 149,317
Amountrecycled
tons116,478 114,994 119,039 124,975 142,629
Finaldisposal
tons1,167 1,956 2,450 3,714 2,433
Recyclingrate
%98 98 97 96 96
Finaldisposalrate
%1 2 2 3 2
Productionplants (group)
Generation tons 1,213 1,254 1,476 1,330 1,291
Amountrecycled
tons958 1,089 1,062 925 851
Finaldisposal
tons1 0 2 16 18
Recyclingrate
%79 87 72 70 66
Finaldisposalrate
%0 0 0 1 1
Constructionwork ✽2 (group)
Generation tons 114,060 113,451 118,111 125,816 144,594
Amountrecycled
tons112,543 111,160 115,303 121,455 138,851
Finaldisposal
tons1,016 1,820 2,258 3,472 2,221
Recyclingrate
%99 98 98 97 96
Finaldisposalrate
%1 2 2 3 2
Businessoffices, etc. (group)
Generation tons 3,460 3,128 3,118 3,046 3,431
Amountrecycled
tons2,976 2,746 2,674 2,595 2,926
Finaldisposal
tons149 136 190 226 194
Recyclingrate
%86 88 86 85 85
Finaldisposalrate
%4 4 6 7 6
Tokyo Gas Generation tons 4,413 3,903 4,137 4,430 4,462
nonconsolidated
Amountrecycled
tons 4,074 3,531 3,647 3,719 3,629
Finaldisposal
tons102 117 194 360 431
Recyclingrate
%92 90 88 84 81
Finaldisposalrate
%2 3 5 8 10
Results by Major Sites (FY2015)
Major LNG terminals (Negishi, Sodegaura, Ohgishima)
Category Generation (tons)
Amountrecycled (tons)
Finaldisposal (tons)
Recyclingrate (%)
Finaldisposal rate
(%)
Sludge 117.3 2.2 0.2 1.9 0.2
Scrap metal 11.1 11.1 0.0 100.0 0.0
Waste oil 4.0 3.8 0.0 95.9 0.1
Waste plastics 8.6 8.1 0.0 93.8 0.5
Speciallycontrolled industrialwaste
4.0 2.1 0.0 53.3 0.0
Other 1.5 0.0 0.0 1.3 0.9
Total 146.5 27.3 0.3 18.7 0.2
Gastar Co., Ltd. (gas appliance manufacturer)
Category Generation (tons)
Amountrecycled (tons)
Finaldisposal (tons)
Recyclingrate (%)
Finaldisposal rate
(%)
Scrap metal 563.1 563.1 0.0 100.0 0.0
Sludge 28.3 28.3 0.0 100.0 0.0
Waste plastics 29.8 29.8 0.0 100.0 0.0
Waste oil 29.9 29.9 0.0 100.0 0.0
Total 651.2 651.2 0.0 100.0 0.0
Data for "Production plants" includes that from business offices that produce city gas and other products, district heating andcooling centers, and power plants. Data for "Construction work" is for construction taken on by group companies as originalcontractors. Data for "Business offices, etc." includes all data other than that from "Production plants" and "Constructionwork."
✽1
Including construction work for customers of our subsidiaries and affiliates.✽2
District Heating and Cooling Centers
Category Generation (tons)
Amountrecycled (tons)
Finaldisposal (tons)
Recyclingrate (%)
Finaldisposal rate
(%)
Sludge 8.0 5.7 0.0 72.0 0.1
Scrap metal 40.3 40.3 0.0 100.0 0.0
Waste oil 4.1 3.7 0.1 90.4 2.3
Waste plastics 10.3 10.3 0.0 99.7 0.3
Other 7.2 7.2 0.0 99.5 0.0
Total 69.9 67.2 0.1 96.1 0.2
Waste from Construction Work
Category Generation (tons)
Amountrecycled (tons)
Finaldisposal (tons)
Recyclingrate (%)
Finaldisposal rate
(%)
Debris 127,437 126,777 660 99.5 0.5
Sludge 9,399 5,717 588 60.8 6.3
Scrap metal 2,008 1,956 42 97.4 2.1
Wood chips 1,626 1,510 101 92.9 6.2
Waste plastics 1,544 1,102 279 71.4 18.1
Glass, concrete, ceramic waste 1,269 842 423 66.3 33.3
Paper waste 274 232 13 84.9 4.6
Other 1,037 715 115 69.0 11.1
Total 144,594 138,851 2,221 96.0 1.5
Business Offices, etc.
Category Generation (tons)
Amountrecycled (tons)
Finaldisposal (tons)
Recyclingrate (%)
Finaldisposal rate
(%)
Scrap metal 895 880 12 98.3 1.3
Waste plastics 852 772 72 90.6 8.4
Waste oil 266 263 1 98.8 0.4
Sludge 417 119 49 28.7 11.8
Glass, concrete, ceramic waste 203 174 29 85.9 14.0
Debris 288 284 4 98.5 1.5
Other 510 433 27 84.9 5.3
Total 3,431 2,926 194 85.3 5.6
General Waste
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
GeneralWaste
Generation tons 3,335 3,407 3,645 3,457 3,143
Amountrecycled
tons2,473 2,489 2,755 2,725 2,441
Recyclingrate
%74 73 76 79 78
Tokyo Gasnonconsolidated
Generation tons 1,147 1,213 1,154 1,132 1,016
Amountrecycled
tons943 1,020 977 967 870
Recyclingrate
%82 84 85 85 86
Paperwaste
Generation tons 2,134 2,199 2,329 2,299 2,056
Amountrecycled
tons1,974 2,060 2,220 2,194 1,934
Recyclingrate
%93 94 95 95 94
Tokyo Gasnonconsolidated
Generation tons 856 920 863 882 783
Amountrecycled
tons801 876 821 830 738
Recyclingrate
%94 95 95 94 94
ByProducts from Gas Pipe Construction Work
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
Gas pipe (Note 1)
PE pipe Amountrecovered
tons219 250 231 228 235
Amountrecycled
tons219 250 231 228 235
Recyclingrate
%100 100 100 100 100
Steelandcastironpipe
Amountrecoveredandrecycled
tons
3,864 3,711 3,995 4,670 5,003
Recyclingrate
%100 100 100 100 100
Excavatedsoil (Note 2)
Pipe extension work km 1,027 1,183 1,160 1,170 1,121
Estimated excavatedamount
milliontons
3.33 3.59 3.57 3.71 4.49
Actualreducedamount
Reduction(byshallowerlaying ofpipes innarrowtrenchesand nonopencutmethod)
milliontons
1.36 1.40 1.43 1.42 1.32
Reuse(generatedsoil)
milliontons 0.43 0.47 0.49 0.52 0.84
Recycle(improvedsoil,regenerationtreatment)
milliontons
1.04 1.10 1.10 1.15 1.33
Totalreductionamount
milliontons 2.83 2.98 3.02 3.09 3.49
Rate ofreductionamount(comparisonto estimatedexcavatedamount)
%
85 83 84 83 78
Residual soil (actualamount)
milliontons
0.50 0.61 0.55 0.62 1.00
Rate of residual soil(comparison toestimated excavatedamount)
%
15 17 16 17 22
Tokyo Gasnonconsolidated(Note 2)
Pipe extension work km 931 1,064 1,064 1,065 1,020
Estimated excavatedamount
milliontons
3.11 3.32 3.33 3.47 4.25
Actualreducedamount
Reduction(byshallowerlaying ofpipes innarrowtrenchesand nonopencutmethod)
milliontons
1.28 1.34 1.36 1.35 1.25
Reuse(generatedsoil)
milliontons 0.39 0.41 0.45 0.47 0.79
Recycle(improvedsoil,regenerationtreatment)
milliontons
1.02 1.08 1.07 1.12 1.31
Totalreductionamount
milliontons 2.69 2.83 2.89 2.94 3.35
Rate ofreductionamount(comparisonto estimatedexcavatedamount)
%
87 85 87 85 79
Residual soil (actualamount)
milliontons
0.41 0.49 0.45 0.52 0.90
Rate of residual soil(comparison toestimated excavatedamount)
%
13 15 13 15 21
Recovery from Our Customers
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015
Waste,etc.
Subject toHomeApplianceRecyclingLaw
Home airconditioningunits
Units recovered units 21,594 20,045 22,009 15,901 14,863
Units sent toprocessing plants
units21,611 20,041 21,892 16,061 14.862
Units disposed ofbyremerchandising,etc.
units
22,471 19,764 19,962 17,882 14,824
Weight disposedof byremerchandising,etc.
tons
959 829 836 748 615
Tokyo Gas nonconsolidatedNote 1:
Data for excavated soil and asphalt concrete. Includes related city gas companies.Note 2:
Remerchandisedweight
tons 827 732 740 670 559
Remerchandisingrate
%86 88 88 89 90
Fluorocarbons Recoveredweight
kg13,180 12,718 13,036 10,837 9,646
Clothes dryers Units recovered units 5,591 5,604 6,873 6,193 6,710
Units sent toprocessing plants
units5,579 5,607 6,820 6,259 6,707
Units disposed ofbyremerchandising,etc.
units
5,569 5,390 6,671 6,573 6,649
Weight disposedof byremerchandising,etc.
tons
198 193 247 249 258
Remerchandisedweight
tons164 158 209 211 228
Remerchandisingrate
%82 81 84 85 88
SRIMS recovery amount (Note)
Used gasappliances, etc.
tons4,136 4,423 4,345 3,933 3,861
Other tons 3,399 3,804 4,343 5,057 5,075
Total tons 7,535 8,227 8,687 8,991 8,936
SRIMS Recovery Results (FY2015)
Category Recovery (tons)
Amountrecycled (tons)
Finaldisposal (tons)
Recyclingrate (%)
Finaldisposal rate
(%)
Used gas appliances and scrapmetal
3,860.9 3860.9 0.0 100.0 0.0
Waste plastics 585.2 565.0 20.2 96.6 3.4
Polystyrene foam 12.5 12.5 0.0 100.0 0.0
Cardboard boxes 696.6 696.6 0.0 100.0 0.0
Debris 763.2 655.9 107.3 85.9 14.1
Concrete and tile scraps 248.0 179.7 68.3 72.5 27.5
Other 2,782.1 2,408.7 373.4 86.6 13.4
Total 8,935.9 8,366.8 569.1 93.6 6.4
Excludes waste from specified kinds of home appliances.Note:
Our environmental protection costs in fiscal 2015 totaled 5.78 billion yen, a decrease of 0.2 billion yen
from the previous fiscal year.
Investments totaled 0.87 billion yen, down 0.34 billion yen from the previous year due mainly to
decreased investment by the production division.
Expenses totaled 4.92 billion yen, an increase of 0.13 billion yen from the previous fiscal year.
The economic effect totaled 13.12 billion yen, an increase of 1.39 billion yen from the previous fiscal
year attributable mainly to increased cost savings resulting from a reduction in excavated soil and the
use of energy-saving equipment.
Environmental Accounting of Tokyo Gas Co., Ltd. on a Non-Consolidated Basis (FY2015 Results)
Period: April 2015 to March 2016 Boundary: Tokyo Gas Co., Ltd. Standard of reference: "Environmental Accounting Guidelines 2005" issued by Japan's Ministry of the Environment, and"Manual for the Introduction of Environmental Accounting in City Gas Business" prepared by the Japan Gas Association
(Unit: million yen)
Categories ofEnvironmental
Protection CostsInvestment Expenses Difference
Major items(examples)
FY 2014
FY 2015
FY 2014
FY 2015 Investment Expenses
Pollutionprevention
Capitalinvestment,maintenanceexpenses,depreciation costs,personnelexpenses, etc. forprevention of airpollution, waterpollution, noisepollution, etc.
281 166 305 308 -115 3
Globalenvironmentalprotection
Capitalinvestment,maintenanceexpenses,depreciation costs,personnelexpenses, etc. forenergyconservation,effective use ofenergy, protectionof the ozone layer,etc.
409 197 784 515 -212 -269
Environmental Protection Costs
Companybusiness
Resourcerecycling
Capitalinvestment,maintenanceexpenses,depreciation costs,personnelexpenses, etc. forreduction/recyclingof excavated soil,waste control, etc.
11 11 395 787 0 392
Environmentalmanagement
Costs for greenpurchasing,environmentaleducation,development andoperation of theEnvironmentalManagementSystem,environmentalorganizations, etc.
0 6 317 322 6 5
Other
Costs associatedwith greenificationand soilrehabilitation inaccordance withthe FactoryLocation Act andordinances
52 21 506 511 -31 5
Customersites
EnvironmentalR&D
Costs for researchand developmentof technologies tominimizeenvironmentalimpact and high-efficiencyappliances andsystems
422 422 1,170 1,158 0 -12
Recycling of used gasappliances
Costs of recoveryand recycling ofsold gasappliances,packaging, etc.
0 0 8 9 0 1
Socialaction
programs
Voluntary greenification,landscape conservation, natureconservation, beautification, support of local environmentalactivities, environmentaladvertising, disclosure ofenvironmental information
27 44 1,298 1,305 17 7
Total 1,203 866 4,783 4,916 -337 133
Notes:
Since decimal places have been rounded off to the nearest whole number, the calculated total and amount of increase ordecrease may not match.
"Expenses" includes depreciation costs of 593 million yen in fiscal 2014 and 545 million yen in fiscal 2015.Since the costs for environmental R&D are extracted from those for environmental protection, they may differ from thefigures stated in the financial report.Capital investment by Tokyo Gas Co., Ltd. (non-consolidated basis) was 182.8 billion yen, while the sales volume was1,677,345 million yen.
<Main differences from the previous fiscal year>
Pollution prevention The decrease in investment was due mainly to decreased investment by the production department.Global environmental protection The decrease in investment was due mainly to a decrease in capital investment by the productiondepartment. The decrease in expenses was due mainly to the decreased cost of repairs by the productiondepartment.Resource recycling The increase in expenses was due mainly to the increased cost of waste disposal and transport.
Level of Environmental Burden
Category FY 2014
FY 2015
Company
business
Pollution
prevention
NOx (plants) mg/m 0.5 0.4
NOx (district heating and cooling centers) g/GJ 6.6 6.6
COD (plants) mg/m 0.0 0.0
Global
environmental
protection
Energy usage intensity (plants) GJ/million m 203 201
Heat sales intensity (district heating and cooling centers)
GJ/GJ2.0 2.0
Energy usage (business offices) TJ 896 887
Resource
saving
Excavated soil (thousand tons) 551 902
Industrial waste (tons) 4,430 4,462
General waste (tons) 1,132 1,016
Customer
sites
Environmental
R&D
(Reference figures)
CO emissions reduction (million tons - CO )3.29 3.40
Recycling of
used gas
appliances
(Reference figures)
Recovery of used gas appliances and scrap metal by
SRIMS (tons)
3,933 3,861
Notes:
Level of environmental burden is based on environmental performance data.Figures are rounded to the nearest whole number.
(Unit: million yen)Economic effect FY2014 FY2015 Difference
Level of Environmental Burden
3
3
3
2 2
Economic Effect
Cost reduction from the operation of energy-saving equipment 428 528 100
Cost reduction from a reduction in the amount of excavated soil 10,854 12,161 1,307
Sale of valuables 448 374 -74
Other (cost reduction from water conservation) 9 61 52
Total 11,739 13,124 1,385
Note:
The total and difference figures may not be equal to actual calculation results because the numbers are rounded off to thenearest integer.
<Main differences from the previous fiscal year>
Economic effect The economic effect increased from the previous fiscal year due mainly to higher cost savingsresulting from reductions in excavated soil and use of energy-saving equipment.
Tokyo Gas prepares and publishes global warming action plans and reports in accordance with localauthority ordinances on measures against global warming.
Tokyo: Global Warming Action Plan (Large Establishments)
Tokyo Metropolitan Government FY2015 Hamamatsucho (Head Office) Building
Tokyo Metropolitan Government FY2015 Senju Techno Station
Tokyo: Global Warming Action Report (Small/MediumSized Establishments)
Saitama Pref.: FY2015 Global Warming Action Plan Report
Kanagawa Pref.: FY2015 Report on Results of Action against Global Warming in Business
Yokohama City: FY2015 Report on State of Action against Global Warming
CO2 is emitted when city gas is used. There are two ways of calculating CO2 emissions: calculating them
directly from the amount of city gas used (in m ), and calculating them from the calorific value (MJ).
CO emission factor for city gas in terms of usage of kgCO per m N of gas
CO2 emission factor
Service area (Pref.)Type of
gasCO2 emission factor per 1 m N (kgCO2/m N)
Tokyo, Kanagawa,
Chiba, Ibaraki,
Tochigi, Saitama13A
Gunma ✽4 13A
CO emission factor for city gas in terms of kgCO per MJ of gas or CO emission factor for city gas in terms of kgC per MJ of gas
Unit calorific values and CO2 emission factors
Service area (Pref.)Type of
gas
Calorific value
per 1 m N
MJ/m N
(kcal/m N)
CO2 emission factor
per 1 MJ of calorific value
(kgCO2/MJ)
C emission factor
per 1 MJ of calorific value
(kgC/MJ)
Tokyo, Kanagawa,
Chiba, Ibaraki,
Tochigi, Saitama
13A 45(10,750) 0.0509 0.0139
Gunma ✽ 13A 43.14(10,306) 0.0506 0.0138
Calculation of CO emission factors from proportional composition of city gas (PDF:297KB)
3
Calculation from usage (m )3
2 2 3
3 3
Emission factor for residential and other lowpressure gas users 2.21kgCO /m ✽12 3
Emission factor for factory, commercial building, and other mediumpressure gas users 2.19kgCO /m ✽22 3
Emission factor at Standard Temperature and Pressure 2.29kgCO /m N ✽32 3
Emission factor for residential and other lowpressure gas users 2.21kgCO /m ✽12 3
Factory, commercial building, and other mediumpressure gas users 2.09kgCO /m ✽22 3
Emission factor at Standard Temperature and Pressure 2.18kgCO /m N ✽32 3
At 15°C and gauge pressure of 2 kPa✽1
At 15°C and gauge pressure of 0.981 kPa✽2
0°C and 101.325kPa (1 atm)✽3
Same as the above service areas since October 14, 2016.✽4
Calculation from calorific value (MJ)
2 2
2
3
3
3
Same as the above service areas since October 14, 2016.✽
2
In Japan, the electricity supplied by electric utilities is
generated primarily by thermal power, nuclear power,
and hydroelectric power plants.
Nuclear power plants operate at full capacity except when undergoing routine inspection, while the annual
power output of hydroelectric power plants is determined by the amount of rainfall.
Therefore, in terms of total annual output, it is most likely to be thermal power generation that is cut when
electricity use is reduced by energysaving measures.
Different approaches are adopted for "calculation of actual
emissions" and "assessment of reduction due to measures."
Actual emissions are typically calculated using the average
factor for all power uses based on the assumption that all power
sources are used. The effects of measures pertaining to
electricity use, on the other hand, must be calculated using the
emission factors for the marginal power sources (thermal power
in the case of Japan) affected by those measures.
Greenhouse gas emission calculation, reporting, and publication arrangements similarly assume that
reductions due to such measures can be calculated using the emission factors of the power sources
affected by the measures. For example, the reduction in the case of an annual 300 kWh power saving
(equivalent to approximately 10% of a standard family's annual electricity use) can be calculated as follows
using the emission factor for thermal power sources:
300 kWh × 0.66 kgCO /kWh ✽ ⇒ CO reduction of 198 kg
The Greenhouse Gas (GHG) Protocol's global "Guidelines for Quantifying GHG Reductions from Grid
Connected Electricity Projects" (WBCSD/WRI) also require the use of marginal factors to calculate the
reduction of CO2 emissions resulting from power reductions.
For more details GHG Protocol Guidelines
The amount of thermal power generation varies according to electricityusage
Methods of calculating CO emission reductions resulting fromdecreases in electricity usage
2
2 2
Plan for Global Warming Countermeasures Attachment 1: Estimated Reduction in CO2 Emissions in 2030 due toCogeneration Use
✽
About Third Party Assurance
The environmental and social performance indicators (data on the environment and human resources)✽
provided in "The Tokyo Gas Group 2016" on this website have been thirdparty assured by KPMG AZSA
Sustainability Co., Ltd. (a member of the KPMG Japan group) to enhance the credibility of the data. We will
continue to raise our CSR standards by addressing the issues raised in the thirdparty assurance process
and reader feedback received online and through other channels.
Content that has been thirdparty assured is indicated by the phrase "thirdparty assured" next to the title on each page.✽
Independent Assurance Report on the Tokyo Gas Group CSR Report 2016
Independent Assurance Report on the Tokyo Gas Group CSR Report 2016 (PDF: 490KB)