Tokyogasgroup csr report

The Tokyo Gas Group Business Activities and Material Balance

Third-party Assured
We monitor and manage impacts on the environment at every stage of our LNG value chain to reduce the impact on the environment.
 
The Tokyo Gas Group Business Activities and Material Balance (FY2017)
Tokyo Gas Group Business Activities and Material Balance (FY2017)
 

Boundary: ▶ Tokyo Gas Co., Ltd. and 46 consolidated subsidiaries in Japan (PDF: 76KB) pdf 

*1 For city gas production by the Tokyo Gas Group.
*2 Energy usage by the Tokyo Gas Group excluding double-counting due to intra-group supply of heat and electricity.
*3 City gas: Volume of gas sales excluding supply to other gas utilities and sales for internal Group use.
     Wholesale supply: Volume of gas supplied to other gas utilities.
     Heat: Includes sales from LNG terminals as well as district heating and cooling centers and spot heat supply. Includes intra-group supply.
     Electric power: Volume of sales of all electric power, including power purchased for business use from other companies and the market 
     as well as Group power stations.
*4 Source: “Study of Life Cycle Greenhouse Gas Emissions of LNG and City Gas 13A” (Proceedings of the annual meeting of Japan Society
     of Energy and Resources 35, pp. 23–26, 2016)
     Production: 0.77; Liquefaction: 6.71; Transportation by sea: 1.48 g-CO2/MJ, based on gross heating value
*5 CO2, CH4, NOx: Excludes double-counting due to intra-group supply.
     Volume of wastewater: Specified wastewater and domestic sewage.
*6, 7 PE pipes, Steel and cast-iron pipes: Tokyo Gas on a non-consolidated basis.
*8 Gas sales volume multiplied by emission intensity.
 
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

(1) Usage of Energy and Water/Emissions into the Atmosphere and Water System

Use of Energy and Water/Emissions into the Atmosphere and Water Systems

Third-party Assured


Feedstock and Sales Volume
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
City gas feedstock
(Note 1)
LNG Thousand tons 11,057 11,513 11,411 11,583 11,407
LPG Thousand tons 418 441 438 434 491
Sales volume City gas 
(Note 2)
Million m3 14,527 15,358 15,263 15,571 15,380
Heat 
(Note 3)
TJ 3,353 3,287 3,251 3,451 3,496
Power 
(Note 4)
Billion kWh 9.71 10.61 10.96 12.65 14.66
 
City Gas Feedstock (LNG/LPG)
City Gas Feedstock (LNG/LPG)
City Gas Sales
City Gas Sales
 
Heat Sales Heat Sales
Power Sales Power Sales

Note 1: For city gas production by the Tokyo Gas Group.

Note 2: Volume of gas sales including supply to other gas utilities and excluding sales for internal Group use.

Note 3: Includes sales volume from LNG terminals, in addition to district heating and cooling centers and spot heat supply. Also includes intra-group supply.

Note 4: Volume of sales of all electric power, including power purchased for business use from other companies and the market as well as Group power stations.


Energy Usage*1, 2

Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
Energy usage (Note 1) TJ 60,457 66,399 68,561 79,230 82,651
  LNG terminals TJ 3,894 4,069 3,998 4,169 4,291
District heating and cooling centers TJ 4,361 4,167 4,167 4,316 4,037
Power plants TJ 49,733 55,639 57,871 68,250 71,967
Tokyo Gas business offices, etc. TJ 1,453 1,417 1,387 1,483 1,444
Other Group companies TJ 1,541 1,490 1,460 1,362 1,368
(Tokyo Gas Co., Ltd.) TJ 5,638 5,785 5,678 5,954 6,043
Electric power (Note 2) MWh 545,218 593,097 615,419 626,729 607,725
  LNG terminals MWh 304,788 334,229 345,227 363,053 368,259
District heating and cooling centers MWh 76,446 90,973 94,640 98,529 84,621
Power plants MWh 10,732 8,774 11,407 9,775 10,700
Tokyo Gas business offices, etc. MWh 54,499 52,350 52,372 51,526 49,786
Other Group companies MWh 118,673 115,677 112,890 103,847 105,089
(Tokyo Gas Co., Ltd.) MWh 364,971 391,536 402,357 419,502 422,776
City gas Thousand  m3 1,275,444 1,402,022 1,447,012 1,691,380 1,775,849
  LNG terminals Thousand m3 21,378 18,769 14,600 14,544 16,206
District heating and cooling centers Thousand m3 82,570 74,482 73,328 75,133 72,420
Power plants Thousand m3 1,152,267 1,289,852 1,341,099 1,582,434 1,668,543
Tokyo Gas business offices, etc. Thousand m3 16,900 16,726 15,969 18,209 17,697
Other Group companies Thousand m3 2,328 2,192 2,015 1,060 984
(Tokyo Gas Co., Ltd.) Thousand m3 43,837 40,994 35,990 38,347 39,676
Heat (Note 2) TJ 31 38 48 71 55
  District heating and cooling centers TJ 176 203 198 232 211
Tokyo Gas business offices, etc. TJ 89 85 88 93 95
Other Group companies TJ 167 158 166 195 195
(Tokyo Gas Co., Ltd.) TJ 99 94 96 102 104
Other fuels TJ 5.40 5.23 5.80 4.89 4.04
  LNG terminals TJ 0.18 0.22 0.68 0.50 0.53
Tokyo Gas business offices, etc. TJ 0.64 0.64 0.60 1.34 0.50
Other Group companies TJ 4.59 4.37 4.52 3.04 3.01
(Tokyo Gas business offices, etc.) TJ 0.85 0.86 1.28 1.84 1.03
Fuels for vehicles Gasoline kL 3,571 3,282 3,219 3,342 3,195
(Tokyo Gas Co., Ltd.) kL 1,461 1,425 1,444 1,420 1,335
Diesel oil kL 228 219 208 198 249
(Tokyo Gas Co., Ltd.) kL 37 35 41 47 59
City gas Thousand m3 218 203 175 135 133
(Tokyo Gas Co., Ltd.) Thousand m3 185 172 142 124 124
LPG kL 295 280 220 142 114
(Tokyo Gas Co., Ltd.) kL - - - - -
LNG cryogenic energy Thousand tons 2,659 2,289 2,364 2,678 2,890
  Cryogenic power generation Thousand tons 796 460 724 785 787
Portion sent to
subsidiaries and affiliates
Thousand tons 821 853 852 820 820
BOG treatment, etc. Thousand tons 1,042 976 788 1,073 1,283
 
Energy Usage (by Fuel Type) Energy Usage (by Fuel Type)
Energy Usage (by Business) Energy Usage (by Business)
Note 1: Excludes double counting by intra-group supply of heat and electricity.
Note 2: Excludes double counting by intra-group supply.


Water Usage
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
Tap water and industrial water Thousand m3 6,023 5,751 5,388 5,017 5,180
  LNG terminals Thousand m3 1,542 1,662 1,457 1,138 1,125
District heating and cooling centers Thousand m3 1,597 1,439 1,459 1,552 1,507
Power plant Thousand m3 1,890 1,703 1,569 1,492 1,765
Tokyo Gas business offices, etc. Thousand m3 607 572 537 544 506
Other Group companies Thousand m3 387 375 366 290 276
(Tokyo Gas Co., Ltd.) Thousand m3 2,192 2,276 2,036 1,726 1,674
Seawater LNG terminals Thousand m3 795,227 784,406 773,963 781,879 784,651
 
Water Usage (Tap Water and Industrial Water) Water Usage (Tap Water and Industrial Water)


Emissions into the Atmosphere
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
Greenhouse gases CO2*1, 2 (Note 1) Thousand tons of CO2 3,074 3,376 3,479 4,014 4,179
  LNG terminals (Note 2) Thousand tons of CO2 200 210 202 206 207
District heating and cooling centers (Note 3) Thousand tons of CO2 223 213 211 217 201
Power plants (Note 4) Thousand tons of CO2 2,522 2,823 2,938 3,466 3,654
Tokyo Gas business offices, etc. (Note 5) Thousand tons of CO2 75 73 71 74 72
Other Group companies (Note 6) Thousand tons of CO2 81 77 75 69 68
(Tokyo Gas Co., Ltd.) (Note 7) Thousand tons of CO2 290 298 288 296 294
CH4*3 (Note 8) Thousand tons of CO2 equivalent 4 6 14 5 11
NOx Tons 272 272 302 367 402
  LNG terminals
(Note 9)
Tons 14 14 11 13 13
District heating and cooling centers Tons 59 53 52 51 54
Power plants Tons 182 187 223 282 311
Tokyo Gas business offices, etc. (Note 9) Tons 17 18 15 21 24
(Tokyo Gas Co., Ltd.) Tons 32 32 28 35 38
 
Greenhouse Gas Emissions (CO2 Equivalent)
(SCOPE 1 + SCOPE 2)

Greenhouse Gas Emissions (CO2 Equivalent)(SCOPE 1 + SCOPE 2)

Note 1: Excludes double counting by intra-group supply. Totaling 4,178 (based on adjusted emission factors) for the Tokyo Gas Group overall.

Note 2: 205 (based on adjusted emission factors)

Note 3: 200 (based on adjusted emission factors)

Note 4: 3,655 (based on adjusted emission factors)

Note 5: 72 (based on adjusted emission factors)

Note 6: 68 (based on adjusted emission factors)

Note 7: 293 (based on adjusted emission factors)

Note 8: About 425 tons of CH4 emissions

Note 9: Emissions from facilities that generate soot and smoke specified in the Air Pollution Control Act.



Greenhouse Gas Emissions from Feedstock Procurement (SCOPE 3)
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
LNG procured Million tons 12.80 13.97 13.87 14.25 14.24
Greenhouse gas
(CO2 equivalent)
(Note)
Extraction Million tons of CO2 0.57 0.62 0.58 0.60 0.60
Liquefaction Million tons of CO2 5.84 6.38 5.08 5.22 5.22
Marine transport Million tons of CO2 1.38 1.50 1.12 1.15 1.15

Note: Calculated based on greenhouse gas emission intensity throughout the lifecycle, from extraction of natural gas to processing and transportation, as analyzed by the LCA approach.

•    FY2012–14 emission intensity
Extraction: 0.81; Liquefaction: 8.36; Transportation by sea: 1.97 g-CO2/MJ, based on gross heating value

Source: “Future Forecast for Life Cycle Greenhouse Gas Emissions of LNG and City Gas 13A” (Japan Society of Energy and Resources, presentation report 28 (2), pp. 51–56, 2007)

•    Emission intensity from FY2015

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” (Proceedings of the annual meeting of Japan Society of Energy and Resources 35, pp. 23–26, 2016) 


CO2 Emissions and Emissions Reduction at Customer Sites (SCOPE 3)
Category Unit FY2011 FY2012 FY2013 FY2014 FY2015 FY2016 FY2017
CO2 Total amount million tons of CO2 26.94 27.09 27.67 29.36 28.96 29.43 29.60
Amount of reduction relative to FY2011 million tons of CO2 Baseline 0.87 1.52 3.29 3.43 3.94 4.04

Energy Usage and CO2 Emissions Associated with Cargo Transportation (Tokyo Gas Co., Ltd.) (SCOPE 3)
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
Transportation amount million tons -km 93.12 94.59 98.42 85.70 82.72
Energy usage (crude oil equivalent) kL 3,258 3,275 3,354 3,165 3,055
Energy usage intensity kL/million tons-km 35.0 34.6 34.1 36.9 36.9
CO2 emissions tons-CO2 8,576 8,615 8,810 8,267 7,993

Emissions into Water Systems
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
Wastewater thousand m3 1,106 1,116 1,091 1,090 1,069
  LNG terminals (Note) thousand m3 242 265 287 291 242
District heating and cooling centers thousand m3 321 325 330 354 330
Power plants thousand m3 544 525 474 445 498
(Tokyo Gas Co., Ltd.) thousand m3 249 273 296 300 258
COD tons 1.9 1.9 1.6 1.4 1.4
  LNG terminals tons 1.2 1.2 1.2 1.0 0.9
Power plants tons 0.6 0.6 0.5 0.4 0.4
(Tokyo Gas Co., Ltd.) tons 1.2 1.2 1.2 1.0 0.9
 
Wastewater Wastewater
COD (Chemical Oxygen Demand) COD (Chemical Oxygen Demand)
Note: Data are for wastewater discharges from wastewater treatment facilities and sewage discharges.

Conversion Factor, etc.

CO2 Emission Factor
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
City gas (Tokyo Gas 13A)
(Note 1)
kg-CO2/m3 2.21
Purchased electricity (average of all power sources) (Note 2) kg-CO2/kWh 0.525 etc. 0.530
etc.
0.505 
etc.
0.500
etc.
0.486
etc.
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

Note 1: Calculated based on the typical composition of city gas (type 13A) supplied by the Tokyo Gas (15°C, gauge pressure of 2 kPa).

Note 2: Emission factors from electric power companies, released in accordance with the ministerial ordinance stipulated by the Act on Promotion of Global Warming Countermeasures.

Note 3: Calculated using the unit calorific value released in accordance with the ministerial ordinance stipulated by the Act on Promotion of Global Warming Countermeasures, and multiplying this amount by the emission factor per unit calorific value and by 44/12.


Unit Calorific Value
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
City gas (Tokyo Gas 13A)
(Note 1)
MJ/m3N 45.00
Purchased electricity
(Note 2)*4
Daytime electricity MJ/kWh 9.97
Nighttime electricity MJ/kWh 9.28
Other than general electricity utilities MJ/kWh 9.76
Heat
(Note 2)
Steam (excluding industrial use), hot water, cold water MJ/MJ 1.36
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
Note 1: City gas calorific value of the Tokyo Gas (0°C, 1 atmospheric pressure)
Note 2: Act on Rationalizing Energy Use (the Energy Efficiency Act)

*1 For district heating and cooling centers that sell power using Combined Heat and Power (cogeneration), the amount of energy usage is divided between those for heat production and those for power generation using the allocation factor calculated based on the Act on Promotion of Global Warming Countermeasures. Data for energy used to produce heat is reflected in “District heating and cooling centers,” and data for energy used for power generation is reflected in “Power plants.” Data for the “Tokyo Gas business offices, etc.” does not include energy used for LNG terminals and district heating and cooling centers. “Other Group companies” refers to data on Group companies excluding district heating and cooling centers, and power plants.

*2 Some variance in the data listed under different categories may exist since the data has been processed to properly assess the changes in energy usage intensity for each business activity (such as by reflecting the amounts commissioned by other companies at LNG terminals).

*3 CH4 (methane) emissions were converted to CO2 emissions by multiplying by the global warming potential of 25, as stipulated in the Act on Promotion of Global Warming Countermeasures.

*4 For the crude oil equivalent of electricity usage under “District heating and cooling centers” and the “Tokyo Gas business offices, etc.,” the amounts purchased from power utility companies were all calculated using daytime electricity factors.

DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

(2) Waste

Industrial WasteThird-party Assured
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
Industrial waste*1, 2 Generation tons 122,705 130,193 149,317 144,230 160,419
Amount recycled tons 119,039 124,975 142,629 140,373 156,064
Final disposal tons 2,450 3,714 2,433 1,312 1,823
Recycling rate 97 96 96 97 97
Final disposal rate 2 3 2 1 1
  Production plants*1 Generation tons 1,476 1,330 1,291 809 617
Amount recycled tons 1,062 925 851 476 354
Final disposal tons 2 16 18 2 4
Recycling rate 72 70 66 59 57
Final disposal rate 0 1 1 0 1
Construction work*1, 2 Generation tons 118,111 125,816 144,594 139,856 155,510
Amount recycled tons 115,303 121,455 138,851 136,807 151,997
Final disposal tons 2,258 3,472 2,221 1,123 1,469
Recycling rate 98 97 96 98 98
Final disposal rate 2 3 2 1 1
Business offices, etc.*1 Generation tons 3,118 3,046 3,431 3,565 4,292
Amount recycled tons 2,674 2,595 2,926 3,090 3,713
Final disposal tons 190 226 194 187 350
Recycling rate 86 85 85 87 86
Final disposal rate 6 7 6 5 8
Tokyo Gas Co., Ltd. Generation tons 4,137 4,430 4,462 4,449 5,950
Amount recycled tons 3,647 3,719 3,629 3,701 4,638
Final disposal tons 194 360 431 389 981
Recycling rate 88 84 81 83 78
Final disposal rate 5 8 10 9 16
 
Industrial Waste (All) Industrial Waste (All)
Industrial Waste (Production Plants) Industrial Waste (Production Plants)

Industrial Waste (Construction Work) Industrial Waste (Construction Work)

Industrial Waste (Business Offices, etc.)Industrial Waste (Business Offices, etc.)
 
Results by Major Sites (FY2017)
LNG terminals (Negishi, Sodegaura, Ohgishima, Hitachi)
Category Generation (tons) Amount recycled (tons) Final disposal (tons) Recycling rate (%) Final disposal rate (%)
Sludge 125.3 23.5 0.0 18.8 0.0
Scrap metal 10.6 10.6 0.0 99.9 0.1
Waste oil 6.3 6.0 0.0 94.9 0.1
Waste plastics 12.4 8.2 0.1 65.8 0.4
Specially controlled industrial waste 1.3 0.3 0.0 22.7 0.0
Other 0.7 0.4 0.0 56.7 0.3
Total 156.5 48.8 0.1 31.2 0.0

District Heating and Cooling Centers
Category Generation (tons) Amount recycled (tons) Final disposal (tons) Recycling rate (%) Final disposal rate (%)
Sludge 17.9 7.6 2.8 42.2 15.4
Scrap metal 26.3 26.3 0.0 100.0 0.0
Waste oil 13.4 12.1 1.1 90.0 7.9
Waste plastics 8.8 8.8 0.0 100.0 0.0
Other 2.8 2.8 0.0 100.0 0.0
Total 69.3 57.5 3.8 83.1 5.5

Waste from Construction Work*2
Category Generation
(tons)
Amount recycled
(tons)
Final 
disposal (tons)
Recycling rate (%) Final disposal rate (%)
Debris 82,346 81,175 637 98.6 0.8
Sludge 2,905 1,412 132 48.6 4.6
Scrap metal 1,932 1,924 4 99.6 0.2
Woodchips 432 397 32 91.7 7.5
Waste plastics 832 668 149 80.3 17.9
Glass, concrete, ceramic waste 59,927 59,605 320 99.5 0.5
Paper waster 195 183 12 93.7 6.1
Other 6,941 6,635 181 95.6 2.6
Total 155,510 151,997 1,469 97.7 0.9

Business Offices, etc.*1
Category Generation
(tons)
Amount recycled
(tons)
Final 
disposal (tons)
Recycling rate (%) Final disposal rate (%)
Scrap metal 1,090 1,077 11 98.8 1.0
Waste plastics 1,389 1,163 214 83.7 15.4
Waste oil 349 346 2 99.2 0.5
Sludge 352 101 59 28.8 16.8
Glass, concrete, ceramic waste 162 126 36 77.7 22.3
Debris 76 68 8 89.1 10.1
Other 874 832 21 95.2 2.4
Total 4,292 3,713 350 86.5 8.2

*1 Data for “Production plants” include that from business offices that produce city gas and other products, district heating and cooling centers, and power plants. Data for “Construction work” are for construction taken on by Group companies as original contractors. Data for “Business offices, etc.” include all data other than that from “Production plants” and “Construction work.”

*2 Including construction work for customers of our subsidiaries and affiliates.

 

General Waste

 
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
General Waste   Generation tons 3,645 3,457 3,143 2,931 2,818
Amount recycled tons 2,755 2,725 2,441 2,224 2,090
Recycling rate 76 79 78 76 74
Tokyo Gas Co., Ltd. Generation tons 1,154 1,132 1,016 1,045 1,010
Amount recycled tons 977 967 870 850 806
Recycling rate 85 85 86 81 80
  Paper waste   Generation tons 2,329 2,299 2,056 1,833 1,722
Amount recycled tons 2,220 2,194 1,934 1,720 1,570
Recycling rate 95 95 94 94 91
Tokyo Gas Co., Ltd. Generation tons 863 882 783 775 719
Amount recycled tons 821 830 738 721 680
Recycling rate 95 94 94 93 95
 
General Waste (All)General Waste (All)
General Waste (Paper) General Waste (Paper)

By-Products from Gas Pipeline Construction

 
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
Gas pipe
(Note 1)
PE pipe Amount recovered tons 231 228 235 260 283
Amount recycled tons 231 228 235 260 283
Recycling rate 100 100 100 100 100
Steel and cast-iron pipe Amount recovered and recycled tons 3,995 4,670 5,003 6,126 5,605
Recycling rate 100 100 100 100 100
Excavated soil
(Note 2)
Pipeline extension work km 1,160 1,170 1,121 1,026 1,038
Estimated excavated amount million tons 3.57 3.71 4.49 3.88 4.03
Actual reduced amount Reduction (by shallower laying of pipes in narrow trenches and non-open-cut method) million tons 1.43 1.42 1.32 1.35 1.28
Reuse (generated soil) million tons 0.49 0.52 0.84 0.62 0.61
Recycle (improved soil, regeneration treatment) million tons 1.1 1.15 1.33 1.27 1.27
Total reduction amount million tons 3.02 3.09 3.49 3.24 3.16
Rate of reduction amount (comparison to estimated excavated amount) 84 83 78 83 79
Residual soil (actual amount) million tons 0.55 0.62 1.0 0.64 0.86
Rate of residual soil (comparison to estimated excavated amount) 16 17 22 17 21
Tokyo Gas Co., Ltd. (Note 2) Pipeline extension work km 1,064 1,065 1,020 973 1,003
Estimated excavated amount million tons 3.33 3.47 4.25 3.75 3.94
Actual reduced amount Reduction (by shallower laying of pipes in narrow trenches and non-open-cut method) million tons 1.36 1.35 1.25 1.31 1.24
Reuse (generated soil) million tons 0.45 0.47 0.79 0.61 0.61
Recycle (improved soil, regeneration treatment) million tons 1.07 1.12 1.31 1.26 1.25
Total reduction amount million tons 2.89 2.94 3.35 3.18 3.10
Rate of reduction amount (comparison to estimated excavated amount) 87 85 79 85 78
Residual soil (actual amount) million tons 0.45 0.52 0.90 0.57 0.85
Rate of residual soil (comparison to estimated excavated amount) 13 15 21 15 22
 
PE Pipe PE Pipe
Steel and Cast-Iron Pipe Steel and Cast-Iron Pipe
Residual Soil and Reduction Amount Residual Soil and Reduction Amount
Note 1: Tokyo Gas Co., Ltd.
Note 2: Data for excavated soil and asphalt concrete.

Recovery of Used Gas Appliances from Customers

 
Category Unit FY2013 FY2014 FY2015 FY2016 FY2017
Waste, etc. Amount recovered
(Note)
Used gas appliance, etc. tons 4,345 3,933 3,861 3,715 3,445
Other tons 4,343 5,057 5,075 4,581 4,695
Total tons 8,687 8,991 8,936 8,296 8,140
Note: Excludes waste from specified kinds of home appliances.

 

Breakdown (FY2017)
Category Amount recovered (tons) Amount recycled (tons) Final disposal (tons) Recycling rate (%) Final disposal rate (%)
Used gas appliances and scrap metal 3,444.8 3,444.8 0.0 100.0 0.0
Waste plastics 559.0 521.9 37.1 93.4 6.6
  Polystyrene foam 15.1 15.1 0.0 100.0 0.0
Cardboard boxes 575.1 575.1 0.0 100.0 0.0
Debris 320.3 287.4 33.0 89.7 10.3
Concrete and tile scraps 253.5 119.1 134.4 47.0 53.0
Other 2,987.1 2,744.9 242.2 91.9 8.1
Total 8,139.7 7,693.2 446.5 94.5 5.1
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

(3) Environmental Accounting

Third-party Assured

Our environmental protection costs in fiscal 2017 totaled 5.7 billion yen, a decrease of 1.7 billion yen from the previous fiscal year.
Investments totaled 970 million yen, down 1.78 billion yen from the previous year due in part to our passing the peak investment phase for the Toyosu Smart Energy Center.
Expenses totaled 4.72 billion yen, an increase of 70 million yen from the previous fiscal year. The economic effect totaled 11.09 billion yen, a decrease of 1.39 billion yen from the previous fiscal year attributable mainly to decreased cost savings resulting from a reduction in excavated soil.


Environmental Accounting of Tokyo Gas on a Non-Consolidated Basis (FY2017 Results)
Period: April 2017 to March 2018
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

Environmental Protection Costs

(Unit: million yen)
  Categories of Environmental Protection Costs Investment Expenses Difference
Major items (examples) FY
2016
FY
2017
FY
2016
FY
2017
Investment Expenses
Company business Pollution prevention Capital investment, maintenance expenses, depreciation costs, personnel expenses, etc., for prevention of air pollution, water pollution, noise pollution, etc. 515 40 380 479 -475 99
Global environmental protection Capital investment, maintenance expenses, depreciation costs, personnel expenses, etc., for energy conservation, effective use of energy, protection of the ozone layer, etc. 1,653 381 674 608 -1,273 -66
Resource recycling Capital investment, maintenance expenses, depreciation costs, personnel expenses, etc., for reduction/recycling of excavated soil, waste control, etc. 8 5 454 369 -3 -86
Environmental management Costs for green purchasing, environmental education, development and operation of the Environmental Management System, environmental organizations, etc. 0 0 313 305 0 -8
Other Costs associated with greenification and soil rehabilitation in accordance with the Factory Location Act and ordinances 42 10 526 466 -32 -60
Customer sites Environmental R&D Costs for research and development of technologies to minimize environmental impact and high-efficiency appliances and systems 514 469 1,029 1,374 -46 345
Recycling of used gas appliances Costs of recovery and recycling of sold gas appliances, packaging, etc. 0 0 8 7 0 0
Social action programs Voluntary greenification, landscape conservation, nature conservation, beautification, support of local environmental activities, environmental advertising, disclosure of environmental information 17 69 1,258 1,108 52 -150
Total 2,750 973 4,642 4,716 -1,777 74

Note: Since decimal places have been rounded off to the nearest whole number, the calculated total and amount of increase or decrease may not match.
”Expenses” include depreciation costs of 721 million yen in fiscal 2016 and 652 million yen in fiscal 2017. Since the costs for environmental R&D are extracted from those for environmental protection, they may differ from the figures stated in the financial report. Capital investment by Tokyo Gas Co., Ltd. (non-consolidated basis) was 165.4 billion yen, while the sales volume was 1,598.9 billion yen.

 
Main differences from the previous fisical 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 in part to our passing the peak investment phase for the Toyosu Smart Energy Center.

Level of Environmental Burden

 
  Level of Environmental Burden
Category FY2016 FY2017
Company business Pollution prevention NOX (Plants) mg/m3 0.5 0.5
NOX (district heating and cooling centers) g/GJ 7.1 6.6
COD (Plants) mg/m3 0.0 0.0
Global environmental protection Energy usage intensity (plants) GJ/million m3 206 209
Heat sales intensity (district heating and cooling centers) GJ/GJ 2.0 2.0
Energy usage (business offices) TJ 938 902
Resource recycling Excavated soil (thousand tons) 573 846
Industrial waste (tons) 4,449 5,950
General waste (tons) 1,045 1,010
Customer sites Environmental R&D (Reference figures)
CO2 emissions reduction (million tons-CO2)
394 404
Recycling of used gas appliances (Reference figures)
Recovery of used gas appliances and scrap metal by SRIMS (tons)
3,715 3,445
Note: The level of environmental burden is based on environmental performance data. 


 

Economic Effect

(Unit: million yen)
Economic effect FY2016 FY2017 Difference
Cost reduction from the operation of energy-saving equipment 482 532 50
Cost reduction from a reduction in the amount of excavated soil 11,664 10,222 -1,442
Sale of valuables 277 309 32
Other (cost reduction from water conservation) 57 29 -28
Total 12,480 11,092 -1,388

Note: The total and difference figures may not be equal to actual calculation results because the numbers are rounded off to the nearest integer.


Main differences from the previous fisical year:
 •    Economic effect
The economic effect decreased from the previous fiscal year due mainly to lower cost savings resulting from reductions in excavated soil.
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Compliance with Local Government Ordinances on the Environment and Energy

Tokyo Gas prepares and publishes the following plans and reports in accordance with the ordinances of local authorities.
 
Tokyo Global Warming Action Plan (Large Establishments)
•    FY2018 Hamamatsucho (Head Office) Building
•    FY2018 Senju Techno Station
•    Global Warming Action Report (Small/Medium-Sized Establishments)
Environmental Energy Reporting Program
•    Energy Status Reports
•    Environmental Energy Plans
Saitama Pref. FY2018 Global Warming Action Plan Report
Kanagawa Pref. FY2018 Report on Results of Action against Global Warming in Business
Yokohama City FY2018 Report on State of Action against Global Warming
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

City Gas CO2 Emission Factors

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 m3), and calculating them from the calorific value (MJ).

Calculation from usage (m3)

CO2 emission factor for city gas in terms of usage of kg-CO2 per m3N of gas


CO2 emission factor
Service area (pref.) Type of gas CO2 emission factor per 1 m3N (kg-CO2/m3N)
Tokyo, Kanagawa, Chiba, Ibaraki, Tochigi, Saitama 13A • Emission factor for residential and other low-pressure gas users
2.21 kg-CO2/m3
*1
• Emission factor for factory, commercial building, and other medium-pressure gas users
2.19 kg-CO2/m3
*2
• Emission factor at standard temperature and pressure
2.29 kg-CO2/m3N
*3
Gunma*4 13A • Emission factor for residential and other low-pressure gas users
2.11 kg-CO2/m3*1
• Factory, commercial building, and other medium-pressure gas users
2.09 kg-CO2/m3*2
• Emission factor at standard temperature and pressure
2.18 kg-CO2/m3N*3​​​​​
Limited areas in Yotsukaido City, Chiba 12A • Emission factor for residential and other low-pressure gas users
1.90 g-CO2/m3*1
• Factory, commercial building, and other medium-pressure gas users
1.88 kg-CO2/m3*2
• Emission factor at standard temperature and pressure
1.96 kg-CO2/m3N*3
*1 At 15°C and gauge pressure of 2 kPa
*2 At 15°C and gauge pressure of 0.981 kPa
*3 0°C and 101.325 kPa (1 atm)
*4 Same as the above service areas since October 14, 2016.

Calculation from calorific value (MJ)

CO2 emission factor for city gas in terms of kg-CO2 per MJ of gas
Or CO2 emission factor for city gas in terms of kg-C per MJ of gas


Unit calorific values and CO2 emission factors
Service area (pref.) Type of gas Calorific value per 1 m3N MJ/m3N (kcal/m3N) CO2 emission factor per 1 MJ of calorific value (kg-CO2/MJ) C emission factor per 1 MJ of calorific value (kg-C/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
Limited areas in Yotsukaido City, Chiba 12A 38.52 (9,200) 0.0509 0.0139
*Same as the above service areas since October 14, 2016.

 
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Assessment of CO2 Emissions Reduction due to Reductions in Purchased Electricity

Amount of Thermal Power Generation Varies According to Electricity Usage
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 a routine inspection, while the annual power output of hydroelectric power plants is determined by the amount of rainfall. The electricity supply is adjusted by operations at thermal power plants. Therefore, in terms of total annual output, it is most likely to be thermal power generation that is cut when electricity use is reduced through energy-saving measures.
 

Lower electricity usage results in lower thermal power output
 
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.