ESG Data

Environmental Data

indicates data assured by independent practitioner,
Deloitte Tohmatsu Sustainability Co., Ltd.

Boundary: Scope of data collection

Unit FY2020 Remarks
Number of companies covered Companies 29 Note: Scope of aggregate total for subsidiaries (coverage): Mizushima Gas Co., Ltd., Toho Liquefied Gas Co., Ltd., Toeki Kyokyu Center Co., Ltd., Toei Co., Ltd., Toho Gas Engineering Co., Ltd., Toho Gas Techno Co., Ltd., Toho Gas Living Co., Ltd., Gas Living Mie Co., Ltd., Toho Gas Safety Life Co., Ltd., Toho Gas Customer Service Co. Ltd., Toeki Customer Service Co. Ltd., Toho Reinetsu Co., Ltd., Toho Gas Information System Co., Ltd., Toho Service Co., Ltd., Toho Real Estate Co., Ltd., Howa Building Service Co., Ltd., Toho LNG Shipping Co., Ltd., Waseda Gas Co., Ltd., Yokkaichi Air Conditioning Engineering Co., Ltd., Yamasa Group (7 companies).
Scope of coverage includes Minori Gas Co., Ltd. and Sugiyama, Ltd. for only the following items:
1. Raw Materials Usage and Sales Amount of Key Products: "Resources for LPG - LPG - Subsidiaries" and "LPG sales - Subsidiaries"
3. Emissions from Procurement and Customers Use: "Greenhouse gases (CO2 equivalent) from procurement - LPG - Subsidiaries" and "CO2 emissions from customer use - LPG - Subsidiaries"
(As of end of March 2021)
Scope of coverage
with respect to
total CO2
emissions amounts
(coverage rate)
Toho Gas % 100
Subsidiaries
(domestic)
% 100
Subsidiaries
(overseas)
% 0

1. Raw Materials Usage and Sales Amount of Key Products

  Unit FY2016 FY2017 FY2018 FY2019 FY2020
Natural gas
raw materials
*1
LNG Total Thousand
tonnes
3,130 3,177 3,050 2,977 2,834
Toho Gas Thousand
tonnes
3,078 3,120 3,005 2,932 2,791
Subsidiaries Thousand
tonnes
52 57 45 46 43
LPG Total Thousand
tonnes
107 105 97 110 109
Toho Gas Thousand
tonnes
106 104 96 109 108
Subsidiaries Thousand
tonnes
0.8 0.8 0.6 0.8 0.9
Resources
for LPG
LPG Subsidiaries*2 Thousand
tonnes
454 465 451 486 462
Natural gas
sales*1
Total Million m3 4,050 4,105 3,924 3,881 3,701
Toho Gas Million m3 3,986 4,036 3,868 3,824 3,647
Subsidiaries*3 Million m3 64 70 55 56 54
LPG sales Subsidiaries*2 Thousand
tonnes
454 465 451 486 462
Electricity
sales
Toho Gas Million kWh 575 990 1,602
Heat sales Toho Gas Thousand GJ 359 352 393 399 359
  1. The data was calculated as the sales of city gas until FY2019 but is changed to the sales of natural gas, which includes the sales of LNG, from FY2020. In accordance with this change, we restated numbers of FY2016-FY2019.
  2. Scope of coverage includes Minori Gas Co., Ltd. and Sugiyama, Ltd.
  3. *3 City gas calorific value at Subsidiaries: 46 MJ/m3

Notes: ・Numbers in table may not sum due to rounding.

2. Environmental Load Due to Business Activities

(1)Energy Consumption

  Unit FY2016 FY2017 FY2018 FY2019 FY2020
Purchased electricity Total*1 Thousand kWh 144,239 144,998 144,022 142,181 122,224
Toho Gas Total*1 Thousand kWh 124,491 128,888 124,796 120,372 107,481
  City gas
plants, etc.
Thousand kWh 90,082 94,090 89,622 84,798 73,779
District heating
and cooling
Thousand kWh 17,320 20,084 20,125 21,359 19,753
Offices, etc. Thousand kWh 17,219 16,107 15,792 14,456 14,372
Subsidiaries Thousand kWh 20,139 19,819 20,185 22,764 15,621
City gas Total Thousand m3N 17,035 17,096 17,321 16,721 15,655
Toho Gas Total Thousand m3N 16,204 16,492 16,732 16,098 15,199
  City gas
plants, etc.
Thousand m3N 1,812 1,906 1,982 2,045 1,839
District heating
and cooling
Thousand m3N 8,837 9,176 10,082 10,421 9,258
Offices, etc. Thousand m3N 5,555 5,410 4,669 3,632 4,102
Subsidiaries Thousand m3N 831 604 589 623 457
Vehicular
fuel
Total GJ 104,105 110,145 107,296 127,231 122,945
Toho Gas GJ 31,080 30,259 27,838 27,183 21,443
Subsidiaries GJ 73,025 79,886 79,459 100,048 101,501
Other
energy
Total*1 GJ 262,080 448,044 461,152 391,335 578,475
Toho Gas GJ 251,793 437,730 442,696 357,128 545,136
Subsidiaries GJ 32,987 40,608 50,507 66,418 63,287
Amount of energy
consumption – total
Total*1 GJ 1,676,128 1,893,152 1,901,877 1,818,503 1,879,030  
Toho Gas GJ 1,460,221 1,674,147 1,672,740 1,542,042 1,637,455  
Subsidiaries GJ 215,907 219,005 229,137 276,461 241,575  

(2)Emissions into Atmosphere

  Unit FY2016 FY2017 FY2018 FY2019 FY2020
CO2 emissions Total*1 Tonnes-CO2 131,031 143,503 145,527 138,890 127,872
Toho Gas Total*1 Tonnes-CO2 113,982 127,530 127,106 117,631 111,400
  City gas
plants, etc.
Tonnes-CO2 58,163 70,108 68,830 59,940 61,176
District heating
and cooling
Tonnes-CO2 31,918 34,306 35,792 39,158 32,772
Offices, etc. Tonnes-CO2 23,955 24,011 23,034 18,722 17,674
Subsidiaries Tonnes-CO2 18,505 19,668 20,644 23,436 18,456
Methane(CH4
emissions*2
Toho Gas Total Tonnes-CO2e 1,244 546 468 4,766 408  
  City gas
plants, etc.
(manufacturing
facilities)
Tonnes-CO2e 144 184 315 233
Offices, etc.
(pipeline
construction, etc.)
Tonnes-CO2e 402 284 4,451 175  
Fluorocarbons
(HCFCs and HFCs)
emissions*3
Toho Gas Tonnes-CO2e 319 231 162 221 283
NOx emissions Toho Gas tonnes 21 23 32 41 40
SOx emissions Total tonnes 0 0 0 0
Toho Gas tonnes 0 0 0 0
Subsidiaries tonnes 0 0 0 0
VOC Toho Gas Amount handled tonnes 0.3 0.0 0.2 0.2
Amount discharged tonnes 0.3 0.0 0.2 0.2
Amount moved tonnes 0 0 0 0

(3)Water Withdrawal (Water Consumption)

  Unit FY2016 FY2017 FY2018 FY2019 FY2020  
Water withdrawal
(water consumption)
Total Thousand m3 1,328 341,677 347,384 301,363 264,028  
Toho Gas Total Thousand m3 1,181 341,532 347,242 301,145 263,843  
  Tapwater
(Municipal
potable water)
Thousand m3 429 450 354 363
Industrial water Thousand m3 698 667 770 700
Well water Thousand m3 1 0 1 3
Seawater*4 Thousand m3 340,404 346,125 300,020 262,777
Surface water
from rivers,
ponds,
and lakes
Thousand m3 0 0 0 0 0  
Quarry water Thousand m3 0 0 0 0 0  
Rainwater Thousand m3 0 0 0 0 0  
External
wastewater
Thousand m3 0 0 0 0 0  
Subsidiaries Total Thousand m3 147 145 142 218 184  
  Tapwater
(Municipal
potable water)
Thousand m3 137 133 132 117
Industrial water Thousand m3 8 9 14 2
Well water Thousand m3 0 0 71 65
Seawater*4 Thousand m3 0 0 0 0 0
Surface water
from rivers,
ponds,
and lakes
Thousand m3 0 0 0 0 0  
Quarry water Thousand m3 0 0 0 0 0  
Rainwater Thousand m3 0 0 0 0 0  
External
wastewater
Thousand m3 0 0 0 0 0  

(4)Discharge, Etc., to Water Systems

  Unit FY2016 FY2017 FY2018 FY2019 FY2020  
Water
discharge
Total Thousand m3 341,510 347,194 301,176 263,869  
Toho Gas Total Thousand m3 341,365 347,052 300,958 263,685  
  Sewer*5 Thousand m3 204 279 224 173
River Thousand m3 105 98 91 88
Ocean*4 Thousand m3 341,056 346,675 300,643 263,423
Subsurface
and well water
Thousand m3 0 0 0 0  
External water
treatment amounts
Thousand m3 0 0 0 0  
Subsidiaries Total Thousand m3 145 142 218 184  
  Sewer*5 Thousand m3 125 124 198 159
River Thousand m3 0 0 0 24
Ocean*4 Thousand m3 20 18 20 2
Subsurface
and well water
Thousand m3 0 0 0 0  
External water
treatment amounts
Thousand m3 0 0 0 0  
Beneficial usage
(amount of
evaporation)
Total Thousand m3 167 190 187 158  
Toho Gas Beneficial usage
(amount of
evaporation)
Thousand m3 167 190 187 158  
Subsidiaries Beneficial usage
(amount of
evaporation)
Thousand m3 0 0 0 0  
COD
(chemical oxigen
demand)
Toho Gas tonnes 0.2 0.2 0.2 0.2 0.2

(5)Waste

  Unit FY2016 FY2017 FY2018 FY2019 FY2020
Industrial
waste
Waste generated Total tonnes 43,399 43,278 36,991 37,015 43,272
(Included in totals:
amount of
hazardous
waste materials
generated*6)
(tonnes) (15) (17) (32) (9)  
Toho Gas tonnes 1,120 1,735 1,353 1,264 1,271
Subsidiaries tonnes 42,279 41,543 35,638 35,751 42,001
Waste
reduced
Total tonnes 1,988 2,141 1,694 1,605 2,782
Toho Gas tonnes 129 266 136 141 189
Subsidiaries tonnes 1,859 1,875 1,558 1,464 2,593
Waste
recycled
Total tonnes 40,053 40,001 34,458 34,588 39,532
Toho Gas tonnes 962 1,419 1,168 1,083 1,028
Subsidiaries tonnes 39,091 38,582 33,290 33,505 38,504
Weight
reduction and
recycling rate
Total 97 97 98 98 98
Toho Gas 97 97 96 97 96
Subsidiaries 97 97 98 98 98
Final disposal
waste
Total tonnes 1,357 1,136 839 822 958
Toho Gas tonnes 29 50 49 40 54
Subsidiaries tonnes 1,329 1,086 790 782 904
General
waste
Waste generated Toho Gas tonnes 570 554 521 572 550
Waste
recycled
tonnes 478 454 427 462 442
Recycling
rate
tonnes 84 82 82 81 80
External
disposal waste
tonnes 92 100 94 110 108
  1. Because portions corresponding to double counting from intra-group exchanges are excluded, figures may not add up to totals.
  2. Calculated the amount of emssions from manufacture and supply of city gas.
  3. Calculated the gases regulated by the Act on Rational Use and Appropriate Management of Fluorocarbons.
  4. Since FY2017, the amounts of water consumption and discharge include seawater.
  5. The amount of water discharged to sewers is calculated with deductions of sewer reduction and exemption amounts, which evaporated at facilities.
  6. Specially controled industrial waste regulated by the Cabinet Order for the Enforcement of the Waste Management and Public Cleansing Act.

Notes: ・CO2 emissions at city gas plants, etc., include the portion for the electricity business.
・Because the scope of coverage has been revised to a consolidated basis, the figures up through FY2019 include Chita Tansan Co., Ltd., but Chita Tansan is not included from FY2020 and after.
・Numbers in table may not sum due to rounding.

3. Emissions from Procurement and Customers Use

  Unit FY2016 FY2017 FY2018 FY2019 FY2020
Greenhouse gases
(CO2 equivalent)
from procurement
Total Ten thousand tonnes-CO2 174 177 170 168 160
Natural gas*1 Toho Gas Ten thousand tonnes-CO2 156 158 152 149 142
Subsidiaries Ten thousand tonnes-CO2 3 3 2 2 2
LPG Subsidiaries*2 Ten thousand tonnes-CO2 16 16 15 17 16
CO2 emissions
from customer use
Total Ten thousand tonnes-CO2 1,023 1,039 996 996 950
Natural gas*1 Toho Gas Ten thousand tonnes-CO2 873 884 847 838 799
Subsidiaries Ten thousand tonnes-CO2 14 15 12 12 12
LPG Subsidiaries*2 Ten thousand tonnes-CO2 136 140 135 146 139
  1. The data was calculated as the sales of city gas until FY2019 but is changed to the sales of natural gas, which includes the sales of LNG, from FY2020. In accordance with this change, we restated numbers of FY2016-FY2019.
  2. Scope of coverage includes Minori Gas Co., Ltd. and Sugiyama, Ltd.

Notes: ・Numbers in table may not sum due to rounding.

For Reference: Amount of Reduced CO2 Emissions at Customer Locations (Totals for Toho Gas and Subsidiaries)

  Unit FY2016 FY2017 FY2018 FY2019 FY2020
Amount of reduced CO2 emissions at customer locations Ten thousand tonnes-CO2 6 6 7 15 7  

Note: Estimates of the CO2 emission reduction through diffusion of highly efficient equipment and systems and fuel conversion, etc., are estimated amounts for the respective fiscal years calculated based on the model set by Toho Gas.

Calculation Standards for Main Environmental Data

<Business Activities of the Toho Gas Group>

  Item Calculation method
Atmosphere and water quality CO2emissions

CO2 emissions factors are as shown in the table below.


Formula: CO2 emissions[tonnes-CO2] = (Purchased electricity, fuel consumption, purchased heat x CO2 emission factor)[tonnes-CO2] - (J-Credit)[tonnes-CO2]
Emissions We calculated emission from manufacturing facilities at city gas plants, emission associated with pipline constructions, and leakage emission due to breakage, etc.

1 Emission from manufacturing facilities at city gas plants

Formula: Methane emission [tonnes-CO2e] = Gas vented volume per respective facility (representative value) [m3/vent] x Number of venting x Methane concentration [%] x 1/100 [1%] x 16 [g] / 22.4 [L] x 1,000 [L/m3] x 1/1,000,000 [tonnes/g] x Global warming potential [tonnes-CO2e/tonne]

2 Emission associated with pipeline constructions

Formula: Methane emission [tonnes-CO2e] = Number of annual construction projects [projects/year] x Mean pipeline volume [m3/project] x 50* [%] x Methane concentration [%] X 1/100 [1%] x 16 [g] / 22.4 [L] x 1,000 [L/m3] x 1/1,000,000 [tonnes/g] x Global warming potential [tonnes-CO2e/tonne]
  • It is assumed that the gas of 50% of the pipeline volume is concomitantly released to the air during gas replacement related to construction.

3 Leakage emission due to beakage, etc.

Formula: Methane emission [tonnes-CO2e] = Number of leakage incidents [incidents/year] x Leakage amount per unit time [m3/min] x Leakage time per incident [min/incident] x Methane concentration [%] X 1/100 [1%] x 16 [g] / 22.4 [L] x 1,000 [L/m3] x 1/1,000,000 [tonnes/g] x Global warming potential [tonnes-CO2e/tonne]

The global warming potential (GWP) is referenced from the Act on Promotion of Global Warming Countermeasures.

Fluorocarbons emissions We calculated leaked gases from equipments regulated by the Act on Rational Use and Appropriate Management of Fluorocarbons.
Formula: Leaked fluorocarbons [tonnes-CO2e] = (Fluorocarbon filled [tonnes] - Recovered fluorocarbon [tonnes]) x Global warming potential [tonnes-CO2e/tonne]
  • The global warming potential (GWP) is referenced from the Act on Promotion of Global Warming Countermeasures.
NOxemissions The scope of coverage is production equipments in facilities regulated by the Air Pollution Control Act (excluding emergency facilities).
Formula: Emissions [tonnes] = Gas emissions at target facilities [m3] x NOx concentration [ppm] x 1/1,000,000 [1/ppm] x 46 [g] / 22.4 [L] x 1/1,000,000 [tonnes/g] x 1,000 [L/m3]
SOxemissions The scope of coverage is gasoline and diesel oil consumed by vehicles and plant equipment.
[Formula: Emissions [tonnes] = Fuel consumption [kL] x Weight density [tonnes/kL] x Sulfur content rate [ppm] x 64 [g] / 32 [g] x 1/1,000,000 [1/ppm]
VOC The scope of coverage is fully painted LNG tanks and gas holders of a size based on the Pollutant Release and Transfer Register system defined by the Act on Confirmation, Etc. of Release Amounts of Specific Chemical Substances in the Environment and Promotion of Improvements to the Management Thereof.
Formula: Emissions [tonnes] = Paint consumption [tonnes] x VOC content rate [%]
COD load The scope of coverage is water quality facilities subject to laws, regulations, and agreements regulating production facilities.
Formula: COD load [tonnes]= Water discharged from target facilities [m3] x COD concentration [mg/L] x 1,000 [L/m3] x 1/1,000,000,000 [tonnes/mg]
Water withdrawal(water consumption)
  • Total amount of tapwater, industrial water, and well water withdrawn
  • Seawater withdrawn: Total amount of withdrawal by gasification seawater pumps in city gas plants.
Formula: Seawater withdrawn [thousand m3] = Pump rated capacity [m3/h] x Operation time [h] x 1/1,000 [thousand m3/m3]
Water discharge Water discharge is calculated by subtracting the amount of sewer reduction and exemption from withdrawn water.
Formula: Water discharge = Water withdrawal - Sewer reduction and exemption
Beneficial usage(amount of evaporation) As the beneficial usage, the scalable loss of water (the amount of sewer reduction and exemption) from regional Energy Centers is used.
Basis: Notification of sewer reduction and exemption amount
Waste Waste generated
  • Amount generated based on manifests or amount measured by waste processor
Waste reduced
  • Reduction of water and so on as a result of incineration, dehydration, and other processes at intermediate processing facilities
    Reported values from industrial waste processors are used as reduction rates for sludge and rubble (asphalt, concrete, and the like from gas pipeline construction) of Toho Gas, whereas figures from the Japan Environmental Management Association for Industry "Recycle Data Book 2020" are used as reduction rates of other materials.
Formula: Waste reduced = Waste generated x Reduction rate
Waste recycled
  • Waste recycled for reuse as raw materials through sorting and so on at intermediate processing facilities
    Reported values from industrial waste processors are used as recycling rates for sludge and rubble (asphalt, concrete, and the like from gas pipeline construction) of Toho Gas, whereas figures from the Japan Environmental Management Association for Industry "Recycle Data Book 2020" are used as recycling rates of other materials.
Formula: Waste recycled = Waste generated x Recycling rate
Weight reduction and recycling rate
  • The ratio of the reduced or the recycled at intermediate processing facilities to the generated
Formula: Weight reduction and recycling rate = (Waste reduced + Waste recycled) / Waste generated
Final disposal waste Formula: Final disposal waste = Waste generated - (Waste reduced + Waste recycled)

<Emissions from Procurement and Customers Use>

  Item Calculation method
Atmosphere Greenhouse gas emissions Procurement Formula: Greenhouse gas emissions = Raw materials usage of LNG and LPG x Greenhouse gas emission factor*

Source:
LNG:
Japan Gas Association website
LPG:
Calculated based on “Future Forecast for Life Cycle Greenhouse Gas Emissions of LNG and City Gas 13A” from the Journal of the 26th Annual Meeting of the Japan Society of Energy and Resources (Vol. 28-2, published in 2007) (gross calorific value basis)

CO2emissions Customer use

CO2CO2 emissions factors are as shown in the table below

Formula: CO2emissions = City gas sales & LNG sales & LPG sales x CO2 emissions factors

CO2 Emission Factors

Unit FY2016 FY2017 FY2018 FY2019 FY2020 Remarks
Purchased electricity Tonnes-CO2/thousand kWh 0.486 0.485 0.472 0.452 0.426 Source:
  • Figures by electric power company released pursuant to ministerial ordinance under the Act on Promotion of Global Warming Countermeasures.
  • In this table, "Chubu Electric Power Miraiz Co., Inc." is listed as an example.
  • From FY2018, "adjusted emission factors" are used.
City gas Tonnes-CO2/thousand m3N 2.29 2.29 2.29 2.29 2.29
  • Calorific value (0℃, 1 atmosphere) calculated by the Toho Gas's city gas (13A) representative composition
Other fuels LPG (gaseous) Tonnes-CO2/thousand m3 6.12 6.12 6.12 6.12 6.12 Source:
  • Values calculated by multiplying emissions factors pursuant to ministerial ordinance under the Act on Promotion of Global Warming Countermeasures by the reciprocal of LPG's weight density
LPG
(liquid)
Tonnes-CO2/thousandℓ 1.71 1.71 1.71 1.71 1.71
LPG Tonnes-CO2Tonnes 3.00 3.00 3.00 3.00 3.00 Source:
  • Emissions factors pursuant to ministerial ordinance under the Act on Promotion of Global Warming Countermeasures
LNG Tonnes-CO2Tonnes 2.70 2.70 2.70 2.70 2.70
Natural
gas
Tonnes-CO2/thousand m3N 2.22 2.22 2.22 2.22 2.22
Diesel oil Tonnes-CO2/thousandℓ 2.58 2.58 2.58 2.58 2.58
Gasoline Tonnes-CO2/thousandℓ 2.32 2.32 2.32 2.32 2.32
Purchased
heat
Steam
(excluding
industrial
steam),
hot water,
and cold water
Tonnes-CO2/GJ 0.057 0.057 0.057 0.057 0.057
J-Credit(Toho Gas) Tonnes-CO2 0 0 △2,215 0 0
  • In FY2018, CO2 emissions were offset through district heating and cooling

For Reference: Appropriate Evaluations of Reductions of CO2 Due to Reduced Use of Electricity
The amounts of CO2 that can be reduced by reducing the amount of electricity consumption must be evaluated depeding on the power sources (marginal power sources) affected by reduction approaches.

For more information, please refer to the Japan Gas Association website(in Japanese).
https://www.gas.or.jp/kankyo/taisaku/denki/

Unit Calorific Values

Unit FY2016 FY2017 FY2018 FY2019 FY2020 Remarks
City gas GJ/Thousandm3N 45.0 45.0 45.0 45.0 45.0 Toho Gas's city gas calorific value (0℃, 1 atmosphere)
Total calorific value: 45 GJ/thousand m3N
Other fuels LPG GJ/tonne 50.8 50.8 50.8 50.8 50.8 Source:
Unit calorific value pursuant to ministerial ordinance under the Act on Promotion of Global Warming Countermeasures
LNG GJ/tonne 54.6 54.6 54.6 54.6 54.6
Natural gas GJ/Thousandm3N 43.5 43.5 43.5 43.5 43.5
Diesel oil GJ/thousandℓ 37.7 37.7 37.7 37.7 37.7
Gasoline GJ/thousandℓ 34.6 34.6 34.6 34.6 34.6

4. Electricity Business

  Unit FY2016 FY2017 FY2018 FY2019 FY2020
Capacity
of owned
facilities
(aggregate value)
Total MW 16.5 19.2 24.7  
Gas(CGS) MW 16.5 16.5 16.5  
Gas(combined cycle) MW 0 0 0  
Nuclear power MW 0 0 0  
Coal MW 0 0 0  
Oil MW 0 0 0  
Renewable
energy
Total MW 0 2.7 8.2  
Biomass MW 0 0 0  
Hydropower MW 0 0 0  
Geothermal MW 0 0 0  
Solar power MW 0 2.7 8.2  
Wind power MW 0 0 0  
Other
renewable
energy
MW 0 0 0  
Generated
amount
(single fiscal
year value)
Total MWh 21,839 12,384 43,048  
Gas(CGS) MWh 21,839 10,569 33,775  
Gas(combined cycle) MWh 0 0 0  
Nuclear power MWh 0 0 0  
Coal MWh 0 0 0  
Oil MWh 0 0 0  
Renewable
energy
Total MWh 0 1,816 9,273  
Biomass MWh 0 0 0  
Hydropower MWh 0 0 0  
Geothermal MWh 0 0 0  
Solar power MWh 0 1,816 9,273  
Wind power MWh 0 0 0  
Other
renewable
energy
MWh 0 0 0  
Water withdrawal
amount in
hydropower
generation
Total thousand m3 0 0 0  

Numbers in table may not sum due to rounding.

5. Details of Greenhouse Gas Emissions(SCOPE 1・2 and SCOPE 1 - 2 - 3 Totals)

  Unit FY2017 FY2018 FY2019 FY2020
Greenhouse
gas emissions
– SCOPE 1 and 2 totals
Total*1 Tonnes-CO2e 144,348 146,223 143,951 128,633
Toho Gas Total*1 Tonnes-CO2e 128,373 127,800 122,689 112,158
  City gas
plants, etc.
Tonnes-CO2e 70,318 69,078 60,326 61,479
District heating
and cooling
Tonnes-CO2e 34,379 35,865 39,210 32,772
Offices, etc. Tonnes-CO2e 24,571 23,408 23,342 18,130
Subsidiaries Tonnes-CO2e 19,670 20,646 23,439 18,458
Greenhouse
gas emissions
– SCOPE 1 - 2 - 3 Totals
Total Tonnes-CO2e 12,369,310 11,854,362 11,855,945 11,291,342
SCOPE 1 CO2
emissions
Total Tonnes-CO2 66,999 65,854 62,353 70,269
Toho Gas Total Tonnes-CO2 59,796 58,688 52,713 61,103
  City gas
plants, etc.
Tonnes-CO2 24,445 23,838 19,527 29,103
District heating
and cooling
Tonnes-CO2 21,006 22,403 23,134 21,201
Offices, etc. Tonnes-CO2 14,345 12,447 10,052 10,798
Subsidiaries Tonnes-CO2 7,203 7,166 9,640 9,166
Methane
(CH4)emissions*2
Toho Gas Total Tonnes-CO2e 546 468 4,766 408
  City gas
plants, etc.
Tonnes-CO2e 144 184 315 233
District heating
and cooling
Tonnes-CO2e 0 0 0 0
Offices, etc. Tonnes-CO2e 402 284 4,451 175
Fluorocarbon
(CFCs, HCFCs, and HFCs)
emissions*3
Toho Gas Total Tonnes-CO2e 231 162 221 283
  City gas
plants, etc.
Tonnes-CO2e 0 0 0 2
District heating
and cooling
Tonnes-CO2e 73 73 52 0
Offices, etc. Tonnes-CO2e 159 89 169 281
Perfluorocarbon
(PFCs)
emissions
Total Tonnes-CO2e 0 0 0 0
Toho Gas Tonnes-CO2e 0 0 0 0
Subsidiaries Tonnes-CO2e 0 0 0 0
N2O emissions Total Tonnes-CO2e 67 65 74 70
Toho Gas Tonnes-CO2e 65 63 71 68
Subsidiaries Tonnes-CO2e 2 2 3 2
SF6 emissions Total Tonnes-CO2e 0 0 0 0
Toho Gas Tonnes-CO2e 0 0 0 0
Subsidiaries Tonnes-CO2e 0 0 0 0
Other
greenhouse gas
emissions
Total Tonnes-CO2e 0 0 0 0
Toho Gas Tonnes-CO2e 0 0 0 0
Subsidiaries Tonnes-CO2e 0 0 0 0
SCOPE 2 CO2
emissions
Total*1 Tonnes-CO2 76,504 79,673 76,537 57,603
Toho Gas Total*1 Tonnes-CO2 67,734 68,418 64,918 50,297
  City gas
plants, etc.
Tonnes-CO2 45,663 44,992 40,413 32,073
District heating
and cooling
Tonnes-CO2 13,300 13,389 16,024 11,570
Offices, etc. Tonnes-CO2 9,666 10,587 8,670 6,876
Subsidiaries Tonnes-CO2 12,465 13,478 13,796 9,290
SCOPE 3*4 Greenhouse
gas emissions
Total Tonnes-CO2e 12,224,962 11,708,138 11,711,994 11,162,709
  1. Because portions corresponding to double counting from intra-group exchanges are excluded, figures may not add up to totals.
  2. Calculations cover the amounts of emissions in the manufacture and supply of city gas.
  3. Calculations cover the gases targeted by the Act on Rational Use and Proper Management of Fluorocarbons.
  4. In FY2019, calculations covered amounts accompanying sales of city gas, but from FY2020, this has been changed so that calculations cover amounts accompanying sales of natural gas, including LNG sales amounts.
    In keeping with this, the change has been retroactively applied to the calculations for the data for FY2019 and earlier has been, and the values have been revised.

• CO2 emissions at city gas plants, etc., include the portion for the electricity business.
•Numbers in table may not sum due to rounding.
• For the global warning potential (GWP) used in calculating amounts of SCOPE 1 emissions (CO2 equivalents), the IPCC Fourth Assessment Report (AR4-100) is employed.
Major GWP values are as shown in the table below.

Targeted substance GWP
CO2 1
CH4 25
N2O 298
SF6 22,800

6. Details of Greenhouse Gas Emissions (SCOPE 3) (Totals for Toho Gas and Affiliates)

  Unit FY2017 FY2018 FY2019 FY2020
Category 1*1 Purchased goods Tonnes-CO2e 277,099 265,839 281,283 266,910
Category 2*1 Capital goods Tonnes-CO2e 62,402 59,674 58,637 55,805
Category 3*1 Fuel procurement Tonnes-CO2e 1,168,946 1,117,481 1,100,501 1,047,721
Category 4*1 Transportation (upstream) Tonnes-CO2e 309,843 296,537 295,689 281,187
Category 5 Waste Tonnes-CO2e 3,403 2,264 2,143 2,426
Category 6 Business travel Tonnes-CO2e 766 754 806 809
Category 7 Commuting Tonnes-CO2e 1,819 1,790 1,913 1,922
Category 8 Leased assets (upstream) Tonnes-CO2e 0 0 0 0
Category 9 Transportation (downstream) Tonnes-CO2e 10,978 10,665 11,462 10,896
Category 10 Product processing Tonnes-CO2e 0 0 0 0
Category 11*1 Product use Tonnes-CO2e 10,389,706 9,953,134 9,959,561 9,495,034
Category 12 Product disposal Tonnes-CO2e 0 0 0 0
Category 13 Leased assets (downstream) Tonnes-CO2e 0 0 0 0
Category 14 Franchises Tonnes-CO2e 0 0 0 0
Category 15 Investments Tonnes-CO2e 0 0 0 0
Other (upstream) Tonnes-CO2e 0 0 0 0
Other (downstream) Tonnes-CO2e 0 0 0 0
Total Tonnes-CO2e 12,224,962 11,708,138 11,711,994 11,162,709
  1. The data was calculated as the sales of city gas until FY2019 but is changed to the sales of natural gas, which includes the sales of LNG, from FY2020. In accordance with this change, we restated numbers of FY2016-FY2019.

Note: No figures are disclosed for the following categories, which are unrelated to our business activities.

<Sources of CO2 emissions coefficients used>

7. Responses to Water Risks

(1) Evaluation of Water Stress

The Toho Gas Group uses water resources for various purposes, such as gasification of LNG, and is aware of the importance of the effective utilization of water.
Through evaluations using Aqueduct, which is issued by the World Resources Institute (WRI), we have confirmed that the areas where the Group's places of business are located all have low water stress.

(2) Compliance with Regulation Criteria

We comply appropriately with regulations and agreements on water, and have experienced no accidents having major environmental impact, or any legal violations.
For seawater used as a heat source for gasification of LNG at city gas plants, we design manufacturing facilities to ensure the temperature difference between water intake and water discharge falls within a certain range with the aim of reducing our impact on ecosystems.

  Unit FY2016 FY2017 FY2018 FY2019 FY2020
Number of incidents
of non-compliance with water quality/
quantity permits, standards and regulations
Incidents 0 0 0 0 0

(3) Disclosure of Water Consumption and Discharge Amounts

We assess the amount of water used generally in the form of municipal potable water in offices, the amount of industrial water, and the amount of well water, and work to conserve water used.
For discharged water, we assess the amount of water discharged at discrete discharge sites and manage the quality of water discharged in accordance with laws and regulations concerning discharge as well as ordinances of local governments.
We make no use of collected rainwater or water collected from quarries. Seawater is used as a heat source for gasification of LNG, but water extracted from seawater (fresh water) is not used.
Data on water withdrawal volumes and water discharge volumes for the past five years appear in ESG Data - Environmental (E) data - 1. Environmental Load - (4) Water Withdrawal (Water Usage Amounts) and (5) Discharge, Etc., to Water Systems.

8.Percentage of Sites Covered by ISO 14001※1 Certification(Non-consolidated)

  Unit FY2016 FY2017 FY2018 FY2019 FY2020
Percentage of Sites Covered by ISO 14001 certification*2
(on a CO2 emissions basis)
51 55 54 51 55
  1. An international standard for continuous reduction of environmental load and improvement of environmental management
  2. Obtained at Chita-Midorihama Works, Chita LNG Terminal, Chita Calorific Value Adjustment Center, and Yokkaichi Works

9.Penalties and Fines Related to Environmental Legislation

In FY2020, there were no administrative dispositions due to violation of laws or regulations related to the environment.

  Unit FY2016 FY2017 FY2018 FY2019 FY2020
Fines related to environmental legislation Yen 0 0 0 0 0

10.Environmental Accounting (Financial Quantification)

FY2020 environmental accounting (scope of accounting: Toho Gas non-consolidated; period covered: April 2020 to March 2021)

Total environmental preservation costs Investment
amount
(million yen)
Expenses
(million yen)
Material effects
(environmental load levels)
  Main details FY
2019
FY
2020
FY
2019
FY
2020
  FY
2019
FY
2020
Toho Gas operations Pollution
prevention
Noise prevention 15 5 34 32 NOx [Plants] (kg/million Nm3-gas production volume) 2.7 3.7
Prevention of water-quality contamination NOx [District heating and cooling](kg/thousand GJ-heat sales volume) 67.3 57.8
COD [Plants](g/million Nm3-gas production volume) 28.1 31.4
Preservation
of the global
environment
(including efforts
addressing
climate change)
Prevention of global warming 150 1,660 514 546 CO2 [Plants](tonnes-CO2/million Nm3-gas production volume) 9.6 8.9
Energy conservation CO2 [District heating and cooling](tonnes-CO2/thousand GJ-heat sales volume) 73.4 77.1
Protection of the ozone layer CO2 [Offices](tonnes-CO2/thousand m2-total floor area) 73.2 74.5
Resource
recycling
Recycling, waste management 0 0 102 98 Volume of excavated soil disposed of externally (tonnes/km-gas pipeline construction length) 332 329
Asphalt and concrete blocks disposed of externally (tonnes/km-gas pipeline construction length) 0 0
Used polyethylene pipe disposed of externally (tonnes) 0 0
General waste disposed of externally (tonnes) 110 108
Industrial waste disposed of externally (tonnes) 40 54
Environmental
management
Study and research relating to forming an environmental-countermeasure organization and to the environment 0 0 161 205      
Other Greening of plants, soil environmental countermeasures 3 0 73 56      
Customer locations Environmental
R&D
Research and development on technologies to reduce environmental load, environmentally friendly products, etc. 94 194 492 437 Reduction of CO2 emissions through improvement in gas-equipment energy usage efficiency and the spread of natural gas (ten thousand tonnes-CO2) 15 7
Product
recycling
Product, container,
and packaging recycling
0 0 12 10 Used gas-equipment recovery volume (tonnes) 851 1,026
Styrene-foam recovery volume (tonnes) 35 43
Social-contribution
activities
Self-initiated greening, environmental advertising 21 2 74 66  
Total 281 1,861 1,462 1,450
Total capital investment amount 28,503 30,281
Environmental capital investment rate (%) 0.987 6.145
Economic effects(million yen) FY2019 FY2020
Amount of expense reduction from operation of energy-saving facilities, etc. 564 545
Amount of expense reduction from reduced excavated soil from gas pipeline construction 974 916
Proceeds from sale of valuable materials 81 70
Total 1,619 1,531

Calculation methods