Environmental Data

Environmental Data (FY2022)

Environmental Data

Independent Assurance

Annual Environmental Targets

Environmental Targets for FY2024
  Management Targets FY2024
Medium-Term Business Plan
(2024-2026)
Decarbonized Society
Scope1 + 2
Reduction of CO2 emissions per sales
-13％
(Compared to FY2022)
Scope1 + 2
Reduction of total CO2 emissions
-1％
(Compared to FY2022)
At building operation stage :Reduction for design-build
projects estimated CO2 emissions
-6％
(Compared to FY2022)
Rate of ZEB for design-build projects (Dimension ratio)
50％
Recycling Oriented Society
 Number of green procurement items adapted at
building construction design stage		 12 items or more per project
Reduction of final disposal rate of construction waste 3.0％ or less
Nature Co-Existing Society
 Promotion of projects that contribute to nature positive 50 projects or more
Environmental Targets for FY2023 and result for FY2022
  Annual Targets FY2022 FY2023 Target Values (Medium-Term Business Plan 2021-2023)
Targets
Values		 Result
Decarbonized Society
At construction stage *1:
Reduction of CO2 emissions per sales		 -38% -47.5% -41%
At construction stage*1:
Reduction of total CO2 emissions		 -51% -60.5% -46%
At building operation stage*1:
Reduction for design-build projects estimated CO2 emissions (including dissemination and promotion of ZEB)		 -42% -49.8% -43%
Recycling Oriented Society
 Adoption of green (environmentally conscious) procurement items at building design stage 11 items or more per project 12.8 items per project 12 items or more per project
Reduction of final disposal rate of construction waste 3.3% or less 2.8% 3.2% or less
Nature Co-Existing Society
 Promotion of projects contributing to improvement in biodiversity 40 projects or more 50 projects or more 40 projects or more
  • *1Compared to FY1990
  • Key performance indicator

TAISEI Group Material Flow (FY2022)

INPUT
Total fossil fuel use 78.3 103kL
Diesel 58.3
Kerosene 4.1
Heavy oil 14.0
Gasoline 1.9
Total electricity use 167 106kWh
Sites
(construction sites)		 109
Factories 35
Offices 23
Total quantity of the main construction materials — —
Ready mixed concrete 1,060 103m3
Cement 66 103t
Aggregates (gravel, crushed stone, etc.) 155 103t
Steel 405 103t
Water (consumption) 2,390 103m3
OUTPUT
Total CO2 emissions(Scope1+2) 291 103t-CO2
Sites
(construction sites)		 211
Factories 64
Offices 16
Scope 1 217 103t-CO2
Scope 2 75
Construction by-products volume 2,420 103t
Quantity recycled 2,335
Quantity of direct final disposal 85
Water (discharged) 3,134 103m3
Supply chain CO2 emissions (Scope3)
Scope 3 5,284 103t-CO2
Category 1 2,105
Category 11 2,856
Other Category 323
Total CO2 emissions (Scope1+2)
TAISEI CORPORATION 189 103t-CO2
Taisei Rotec Corporation 94
TAISEI U-LEC CO., LTD. 5
Five other companies 3
Construction By-product volume
TAISEI CORPORATION 2,012 103t
Taisei Rotec Corporation 332
TAISEI U-LEC CO., LTD. 60
Five other companies 17

TAISEI CORPORATION Material Flow

INPUT

Third-party assured values are indicated with the mark

Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Total energy use 109MJ 4.14 4.39 3.60 3.77 3.24
Construction site (building) 109MJ 1.61 1.99 1.04 1.45 1.32
Construction site
(civil engineering)		 109MJ 2.31 2.18 2.35 2.10 1.70
Offices 109MJ 0.22 0.22 0.22 0.22 0.22
Total fossil fuel use 103kL 79.0 76.7 61.4 62.7 50.9
Diesel 103kL 77.8 75.2 60.0 62.2 45.1
Kerosene 103kL 0.5 0.6 0.9 0.5 0.9
Heavy oil 103kL 0.8 1.0 0.5 0.1 5.0
Total electricity use 106kWh 111 145 122 136 125
Construction site (building) 106kWh 43 57 21 34 49
Construction site
(civil engineering)		 106kWh 52 73 87 85 59
Offices 106kWh 15 15 15 16 16
City gas (offices) 103m3 140 213 259 165 118
GTL 103kL — — — — 0.3
Quantity of the main construction materials*1
Ready mixed concrete*2 103m3 3,375
(103t)		 4,066
(103t)		 3,855
(103t)		 1,523 1,060
Cement 103t 695 263 172 120 66
Aggregates (gravel, crushed stone, etc.) 103t 2,038 2,514 387 315 155
Steel 103t 414 506 534 539 405
Water (consumption)*3 103m3 1,436 1,414 1,412 2,266 2,279
Construction site 103m3 — 1,348 1,363 2,215 2,220
Office 103m3 — 66 49 51 59
Proportion by worksites water intake destination*4
Tap water / water for industrial use % — 82 67 22 57
River water / groundwater / etc. % — 18 33 78 43
Seawater % — 0 0 0 0
  • *1Up through FY 2020, the contract quantities were tabulated. Beginning in FY2021, sales quantities for the four main construction materials (ready-mixed concrete, cement, aggregates, and steel) were tabulated. In FY2022, sales quantities for Taisei Corporation's independent construction projects and turnover quantities for joint venture constructions according to Taisei’s equity interest were tabulated, calculated, and disclosed.
  • *2From FY 2018 through FY 2020, quantities have been shown as “103t.”
  • *3Consumption ＝ Intake quantity. The discrepancy between the consumption quantity and the discharge quantity is mainly due to the fact that naturally gushed out spring water, ground water, etc., at the worksites are not included in the consumption quantity, but are included in discharge quantity as they are subject to management.
  • *4Proportion calculated from intake and discharge quantities at sampled worksites. *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
OUTPUT

Third-party assured values are indicated with the mark

Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Total CO2 emissions(Scope1+2) 103t-CO2 261 267 216 224 189
Construction site (building) 103t-CO2 102 124 66 91 78
Construction site
(civil engineering)		 103t-CO2 148 133 140 123 101
Offices 103t-CO2 11 10 10 10 10
At construction stage
Reduction of CO2 emissions per sales (intensity)		 t-CO2/JPY 100 million 19.5 18.8 19.1 19.1 14.4
Total CO2 emissions*1 103t-CO2 261 267 216 224 189
Scope 1*1 103t-CO2 204 198 159 162 133
Scope 2*2 103t-CO2 57 69 57 61 56
NOX t 1,345 1,302 1,039 1,085 813
SOX t 205 200 158 162 151
Quantity of Chlorofluorocarbon and halon recovered*4 t 15 21 — — —
Construction waste 103t 2,020 2,411 1,787 1,976 2,012
Quantity recycled 103t 1,924 2,283 1,715 1,914 1,939
Quantity of direct final disposal 103t 96 128 71 62 73
Water (discharged) 103m3 4,483 4,288 6,625 9,677 3,014
Construction site 103m3 — 4,228 6,578 9,627 2,955
Office 103m3 — 60 47 50 59
Proportion by worksite discharge destination*5
Sewer, etc. % — 34 19 11 66
River / lake / agricultural drainage ditch % — 65 77 89 33
Ocean % — 1 4 0 1
  • *1Since in FY2021, in accordance with the Japan Federation of Construction Contractors guidelines, emissions at Taisei worksites from fuel are listed under Scope 3 in FY2020 were included in Scope 1.
  • *2Total CO2 emissions in FY2022 include the effects of reduction of 113t- CO2 from using renewable energy which non-fossil certificates.
  • *3Up to FY2019, the quantities of fluorocarbons and halons emitted by Taisei that have been recovered have been tabulated and disclosed (halon recovery quantities since FY 2018), in accordance with the Fluorocarbon Recovery and Destruction Act. In FY2020, leak quantities were tabulated in accordance with the Act for Rationalized Use and Proper Management of Fluorocarbons. Leak quantities were minute and were therefore not disclosed.
  • *4The discrepancy between the consumption quantity and the discharge quantity is mainly due to the fact that naturally gushed out spring water, ground water, etc., at the worksites are not included in the consumption quantity, but are included in discharge quantity as they are subject to management.
  • *5Proportion calculated from intake and discharge quantities at sampled worksite.
  • *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
Supply Chain CO2 Emissions (Scope3)

Third-party assured values are indicated with the mark

Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Scope 3 Total 103t-CO2 — — 4,991 3,878 4,616
1. Purchased goods and services*1 103t-CO2 — — 1,347 1,283 1,889
2. Capital goods 103t-CO2 — — 4 0 13
3. Fuel-and-energy-related activities 103t-CO2 — — 32 33 28
4. Upstream transportation and distribution 103t-CO2 — — 9 8 5
5. Waste generated in operations 103t-CO2 — — 179 209 143
6. Business travel 103t-CO2 — — 1 1 1
7. Employee commuting 103t-CO2 — — 5 5 5
8. Upstream leased assets 103t-CO2 — — 1 0 0
9. Downstream transportation and distribution 103t-CO2 — — — N/A N/A
10. Processing of sold products 103t-CO2 — — — N/A N/A
11. Use of sold products 103t-CO2 — — 3,371 2,284 2,495
12. End of life treatment of sold products 103t-CO2 — — 40 51 35
13. Downstream leased assets 103t-CO2 — — 5 5 3
14. Franchises 103t-CO2 — — — N/A N/A
15. Investments 103t-CO2 — — — N/A N/A
  • *1For FY2020 and FY2021, the CO2 emissions for the four main construction materials (ready-mixed concrete, cement, aggregates, and steel) were calculated. From FY2022, those for all items were calculated. The CO2 emissions in FY2022 for the four main construction materials were 933 (103t- CO2).
  • *Beginning in FY2020, values based on the GHG Protocol, etc. are disclosed.
  • *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).

Material Flow for Group Companies

INPUT

Third-party assured values are indicated with the mark

Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Total energy use 109MJ 1.62 1.68 1.70 1.70 1.70
Sites
(Construction site) 		109MJ 0.39 0.32 0.37 0.42 0.47
Factories 109MJ 1.10 1.23 1.20 1.15 1.12
Offices 109MJ 0.12 0.12 0.13 0.12 0.12
Total fossil fuel use 103kL 26 26 27 27.4 26.7
Diesel 103kL 12 10 11 12.2 13.2
Kerosene 103kL 2 3 3 2.7 2.5
Heavy oil 103kL 11 11 11 10.8 9.0
Gasoline 103kL 2 2 2 1.7 1.9
Total electricity use 106kWh 40 43 43 43 42
Sites
(Construction site)		 106kWh 1 1 1 1 1
Factories 106kWh 33 35 35 35 35
Offices 106kWh 7 7 7 7 7
City gas 103m3 4,628 5,692 5,056 4,169 4,589
GTL 103kL — — 0 0.2 0.1
LPG t 378 485 575 598 1,231
Water (consumption) 103m3 115 138 109 102 111
  • *Note: Data are from TAISEI Group Company is excluding TAISEI COPORATION (domestic).
OUTPUT
Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Total CO2 emissions(Scope1+2) 103t-CO2 100 101 102 101 102
Construction site 103t-CO2 27 22 25 29 32
Factories 103t-CO2 66 72 70 66 64
Offices 103t-CO2 7 7 7 6 6
Total CO2 emissions*1 103t-CO2 100 101 102 101 102
Scope 1*1 103t-CO2 80 81 83 83 84
Scope 2*2 103t-CO2 20 20 19 18 19
NOX t 257 227 224 280 295
SOX t 107 103 105 107 97
Quantity of Chlorofluorocarbon and halon recovered t 3 2 2 6 6
Total industrial waste generated 103t 266 485 416 476 408
Quantity recycled 103t 256 475 406 465 397
Final disposal quantity 103t 10 10 10 11 12
Water (discharged) 103m3 109 74 76 108 120
  • *1Since FY 2021, in accordance with the Japan Federation of Construction Contractors guidelines, emissions at Taisei worksite from fuel are listed under Scope 3, which in FY 2020 was included in Scope 1.
  • *2The quantities of fluorocarbons and halons emitted by the Group Companies that have been recovered have been tabulated and disclosed (the quantity of halons recovered until FY2018).
  • *Note: Data are from TAISEI Group companies is excluding TAISEI COPORATION (domestic).
Supply Chain CO2 Emissions (Scope3)
Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Scope 3 Total 103t-CO2 — — — 753 668
1. Purchased goods and services*1 103t-CO2 — — — 246 216
2. Capital goods 103t-CO2 — — — 19 12
3. Fuel-and-energy-related activities 103t-CO2 — — — 17 12
4. Upstream transportation and distribution 103t-CO2 — — — 9 5
5. Waste generated in operations 103t-CO2 — — — 13 18
6. Business travel 103t-CO2 — — — 1 1
7. Employee commuting 103t-CO2 — — — 1 1
8. Upstream leased assets 103t-CO2 — — — 0 0
9. Downstream transportation and distribution 103t-CO2 — — — 5 5
10. Processing of sold products 103t-CO2 — — — N/A N/A
11. Use of sold products 103t-CO2 — — — 405 361
12. End of life treatment of sold products 103t-CO2 — — — 9 7
13. Downstream leased assets 103t-CO2 — — — 28 28
14. Franchises 103t-CO2 — — — N/A N/A
15. Investments 103t-CO2 — — — N/A N/A
  • *Beginning in FY2021, values based on the GHG Protocol, etc. are disclosed.
  • *Note: Data are from TAISEI Group companies is excluding TAISEI COPORATION (domestic).

Projected CO2 emissions and reduction rate in the building operation phase

Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Projected CO2 emissions 103t-CO2 10 15 42 19 13
Calculated values according to 1990 standard 103t-CO2 17 25 72 34 26
(reduction rate) % 40.2 39.5 41.4 44.6 49.8
Emissions by floor space kg-CO2
/Year·m2		 30 23 32 17 11
  • * Note: Data are from TAISEI Corporation (non-consolidated) (domestic).

Total Construction By-product (Waste / valuable resources)

Total Construction By-product

Third-party assured values are indicated with the mark

Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Total Construction By-product 103t 2,020 2,411 1,787 1,976 2,012
Excluding sludge and specially controlled industrial wastes 973 1,268 1,066 1,119 1,314
Final disposal quantity 96 128 71 62 73
Excluding sludge and specially controlled industrial wastes 88 74 51 38 42
Quantity recycled 1,924 2,283 1,715 1,914 1,939
Excluding sludge and specially controlled industrial wastes 886 1,194 1,016 1,082 1,272
  • * Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
Emissions (103t) and recycle rate by type (FY2022)

Third-party assured values are indicated with the mark

Construction By- product Civil engineering Building construction Total Recycling rate (%)
New Construction Demolition Subtotal
Concrete remnants 133 268 508 776 908 100
Asphalt- concrete Remnants 53 64 10 74 127 100
Construction site sludge 390 222 32 254 644 —
Mixed waste 6 32 6 38 44 77.6
Wood scrap 21 10 4 14 35 94.9
Metal scrap 2 13 12 26 27 99.6
Waste plastics 2 5 1 6 8 68.8
Miscellaneous 83 99 36 135 218 74.5
Total 689 714 608 1,322 2,012 —
Recycling Rate

Third-party assured values are indicated with the mark

Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Concrete remnants % 100 100 100 100 100
Asphalt- concrete Remnants 100 99.5 100 100 100
Wood scrap 95.0 95.0 95.0 95.0 94.9
  • *The above three items are specific construction material waste based on the Construction Material Recycling Act.
  • *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).

Management of Hazardous Wastes

Hazardous waste quantity
Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Specially Controlled Industrial Wastes 103t 10 10 3 3 3
Waste asbestos etc. 1 2 1 3 3
Industrial wastes containing asbestos 4 14 5 15 17
Mercury-using products 0 0 0 0 0
  • *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
PCB wastes
Category Units FY2018 FY2019 FY2020 FY2021 FY2022
Quantity of PCB wastes generated and discarded kg — 0 0 31 27
  • *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
Volatile organic compounds (VOC discharge quantity)
Category Units FY2018 FY2019 FY2020 FY2021 FY2022
VOC emissions* t — N/A N/A N/A N/A
  • *As of November 2022, there were no items that fall under the heading of volatile organic compound discharging facilities and discharge criteria subject to regulation as established by the Volatile Organic Compound (VOC) Discharge Control System (Ministry of the Environment).
  • *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).

Environmental data / Indicator Calculation Method / criteria

Target organizations
  • - Domestic enterprises of Taisei Group companies (Taisei Corporation, Taisei Rotec Corporation, Taisei-Yuraku Real Estate Co., TAISEI U-LEC CO., LTD, Seiwa Renewal Works, Taisei Setsubi Co., Ltd., J-FAST Co., Ltd., Taisei Housing Corporation)
  • - The target organizations cover more than 90% of the sales of the entire Taisei Group.
Category by type of worksite Construction site (civil engineering / building), office (not including development projects and other projects) or factory
CO2 emissions Scope categories Scope 1: CO2 emissions from burning of fossil fuels (including transport of construction by-products from worksites)
Scope 2: Indirect CO2 emissions from the use of power, steam or hot and cold water
Scope 3: CO2 emissions from other companies involved in business activities
Taisei Corporation Material Flow
INPUT Calculation method / criteria
Fossil fuel use 103kL Aggregation criteria
  • Aggregated in conformance with the Act on Rationalizing Energy Use and Shifting to Non-fossil Energy, Act on Promotion of Global Warming Countermeasures, the GHG Protocol, the Japan Federation of Construction Contractors guidelines, etc., and based on in-house regulations relating to environmental data management, the Taisei Group environmental data aggregation manual, and the Taisei Corporation environmental data aggregation manual.
Calculation of use
  • -Offices: Annual purchase quantity and usage are aggregated for each month
  • -Construction site (Civil Engineering and Building worksites): Annual consumption was aggregated for 167 sampled worksites and the consumption per unit of construction sales (basic unit) for the period was calculated. The annual consumption for the sampled worksites was aggregated (for 2 months until FY2021) and combined with the annual consumption of the other worksites, derived by multiplying the basic unit by the construction sales of Taisei and calculated. For civil engineering, this calculation is performed for each construction type.
  • *Energy-related: Major fossil fuels (heavy oil, light oil, gasoline (office), kerosene),electricity, city gas, GTL, steam, and hot and cold water consumption and their energy-equivalent values
  • *The total of energy usage is the value of fossil fuel usage + power usage + city gas (office) usage + steam and hot and cold water usage converted into joules.
Electricity use 106kWh
City gas (offices) 103m3
Water (consumption) 103m3
Quantity of the main construction materials — Calculation method of the main construction materials usage:
  • -The purchase quantity of main construction materials (ready-mixed concrete, cement, aggregates and steel) purchased for construction by Taisei Corporation is calculated. For independent construction work by Taisei Corporation, the directly purchased quantity; and for construction work as the representative of a joint venture construction, the purchased quantity multiplied by Taisei's share sales, is used. For joint venture constructions, in which Taisei is not representative, material usage is calculated based on Taisei’s construction sales for the year.
OUTPUT Calculation method / criteria
CO2 emissions Scope 1 and 2 103t-CO2 Aggregation criteria
  • Aggregated in conformance with the Act on Rationalizing Energy Use and Shifting to Non-fossil Energy, Act on Promotion of Global Warming Countermeasures, the GHG Protocol, the Japan Federation of Construction Contractors guidelines, etc., and based on in-house regulations relating to environmental data management and the Taisei Group environmental data aggregation manual.
CO2 emission factor
  • Light oil, heavy oil, etc.: Calculated using the emission factor in the Act on Rationalizing Energy Use and Shifting to Non-fossil Energy and Act on Promotion of Global Warming Countermeasures.
    GTL: Calculated using the 2.36 kg-CO2 / l computed by Shell Global Solutions.
    Electricity: Calculated using 0.436 t-CO2 /MWh, the 2021 post-adjustment emission factor from the receiving end in the figures announced by the Japan Business Federation. For offices, calculated using the post-adjustment emissions coefficient for the FY2021 results for each electric power company.
    City gas: Calculated using the standard calorific value of city gas suppliers and the emission factor in the Act on Promotion of Global Warming Countermeasures.
Construction stage: CO2 emission per construction sales
  • Calculated by dividing the CO2 emission of Taisei sites (Civil Engineering and Building Construction)) (not including the effects of reduction by conversion to real renewable energy through the purchase of non-fossil certificates) by the construction sales of Taisei.
  • *Calculation of CO2 emission of the Civil Engineering and Building Construction (worksites): Annual consumption of fossil fuels, electricity, and GTL was aggregated (for 2 months until FY2021) at the sampled worksites and combined with the annual consumption of the other worksites, derived by multiplying the basic unit by the construction sales of Taisei, and calculated by multiplying it by the CO2 emission factor.
NOx t Emissions from light oil, heavy oil, and kerosene are calculated using the emissions coefficient in the Architectural Institute of Japan “Building LCA Guidelines: Assessment Tool for Global Warming, Resource Consumption and Waste Measures (revised version).”
SOx t
Construction by-product 103t Construction by-product from independent construction work, joint venture construction in which Taisei is the representative, and construction by-product generated at owned factories, etc. (wastes/valuable resources).
Supply chain CO2 emission Calculation method / criteria
CO2 emissions Scope 3 103t-CO2 Aggregation criteria
  • Aggregated in conformance with the basic guidelines for calculation of greenhouse gas emissions throughout the supply chain, the GHG Protocol, etc., and based on in-house regulations relating to environmental data management and the Taisei Group environmental data aggregation manual.
CO2 emission factor
  • Calculated using the emission factor in the basic guidelines for calculation of greenhouse gas emissions throughout the supply chain (LCI database IDEAv2 (for calculation of supply chain greenhouse gas emissions)).
Category 1: Purchased products / services
  • CO2 emissions are calculated by multiplying the purchase quantities of each of the major construction materials (ready-mixed concrete, cement, aggregate, and steel) by the emission factor. Then, using the “Appendix 1.4.7 CO2 emissions per unit price of construction based on the 2005 Construction Sector Input-Output Table for Analysis ((iii) For Overseas spillover and consumption expenditures)” of the Architectural Institute of Japan “Building LCA Guidelines” “LCA Database Ver. 1.02,” emissions of all items are calculated from the CO2 emissions of the major construction materials.
Category 11: Use of sold products
  • Calculated by multiplying the total floor area of the completed building by the emission factor (culcurate for each use past 3 years performance) and the service life (Comprehensive Assessment System for Building Environmental Efficiency (CASBEE) assessment manual).
Projected CO2 emissions at the building use stage and reduction rate Calculation method / criteria
Calculated value based on 1990 level 103t-CO2 Of the buildings constructed by Taisei Corporation, emissions for the 1.2 million m2 from 50 projects with a total floor area of 300 m2 or greater were calculated using the Energy Saving Plan for each project at the design stage.
  • Energy Saving Plan: Compilation of the steps to be taken to reduce energy usage by thermal insulation and high-efficiency air conditioning equipment, etc. in accordance with the Act on the Rational Use of Energy, etc. Must be submitted at the design stage for buildings with a total floor area of 300 m2 or greater.
Projected CO2 emissions 103t-CO2
Projected CO2 reduction rate %
Emissions by floor area kg-CO2/year·m2
Emissions and recycle rate for Construction by-product by type Calculation method / criteria
Construction by-product 103t Construction by-product from independent construction work and joint venture construction in which Taisei is the representative, and construction by-products generated at owned factories, etc. (wastes / valuable resources).
Recycle rate %
　　
Group Companies
INPUT Calculation method / criteria
Fossil fuel use 103kL Aggregation criteria
  • Aggregated in conformance with the Act on Rationalizing Energy Use and Shifting to Non-fossil Energy, Act on Promotion of Global Warming Countermeasures, GHG Protocol, and the Japan Federation of Construction Contractors guidelines, etc., and based on in-house regulations relating to environmental data management, the Taisei Group environmental data aggregation manual, and the manuals of each Group company.
Calculation of use
  • Offices and Factories: Annual purchase quantity and usage are aggregated for each month
  • Construction site (Civil Engineering and Building worksites): Aggregated based on the Taisei Group environmental data aggregation manual and the manuals of each Group company
  • *Energy-related: Major fossil fuels (heavy oil, light oil, kerosene, gasoline), electricity, city gas, GTL, LPG, and LNG consumption and their energy-equivalent values
  • *The total of energy usage is the value of fossil fuel usage + electricity usage + city gas usage + LPG usage + LNG usage converted into joules.
Electricity use 106kWh
City gas 103m3
LPG t
OUTPUT Calculation method / criteria
CO2 emissions 103t-CO2 Aggregation criteria
  • Aggregated in conformance with the Act on Rationalizing Energy Use and Shifting to Non-fossil Energy, Act on Promotion of Global Warming Countermeasures, GHG Protocol, and the Japan Federation of Construction Contractors guidelines, etc., and based on in-house regulations relating to environmental data management and the Taisei Group environmental data aggregation manual.
CO2 emission factor
  • Light oil, heavy oil, etc.: Calculated using the emissions coefficients in the Act on Rationalizing Energy Use and Shifting to Non-fossil Energy and Act on Promotion of Global Warming Countermeasures.
    GTL：Calculated using the 2.36 kg-CO2/l computed by Shell Global Solutions.
    Power: Calculated using 0.436 t-CO2/MWh, the 2021 post-adjustment emission factor from the receiving end in the figures announced by the Japan Business Federation. For certain worksites, offices, and factories, calculated using the post-adjustment emission factor for the FY 2021 results for each electric power company.
    City gas: Calculated using the standard calorific value of city gas suppliers and the emission factor in the Act on Promotion of Global Warming Countermeasures.
Construction wastes 103t Construction wastes from independent construction work, joint venture construction in which Taisei is the representative, and construction wastes generated at owned factories.
Supply chain CO2 emissions Calculation method / criteria
CO2 emissions Scope 3 103t-CO2 Aggregation criteria
  • Aggregated in conformance with the basic guidelines for calculation of greenhouse gas emissions throughout the supply chain, the GHG Protocol, etc., and based on in-house regulations relating to environmental data management and the Taisei Group environmental data aggregation manual.
CO2 emission factor
  • Calculated using the emission factor in the basic guidelines for calculation of greenhouse gas emissions throughout the supply chain (LCI database IDEAv2 (for calculation of supply chain greenhouse gas emissions)).

Sustainability

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