Environmental Data (FY2023)
TAISEI CORPORATION Annual Environmental Targets
Environmental Targets for FY2024
|
Annual 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 CO 2 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 / 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 |
- Key Performance Indicator
Environmental Targets and Results for FY2023
|
Annual Targets |
FY2023 |
Targets |
Results |
Decarbonized Society
|
At construction stage*1:
Reduction of CO2 emissions per sales◎ |
-41% |
-45.2% |
At construction stage*1:
Reduction of total CO2 emissions◎ |
-46% |
-57.1% |
At building operation stage*1:
Reduction for design-build projects estimated CO2 emissions (including dissemination and promotion of ZEB)◎ |
-43% |
-46.6% |
Recycling Oriented Society
|
Adoption of green (environmentally conscious) procurement items at building design stage |
12 items or more per PJ |
13.7 items / PJ |
Reduction of final disposal rate of construction waste |
3.2% or less |
2.9% |
Nature Co-Existing Society
|
Promotion of projects contributing to improvement in biodiversity |
40PJ or more |
44PJ |
◎KPIs for Medium-Term Business Plan (2021-2023)
TAISEI Group Material Flow (FY2023)
INPUT |
Total fossil fuel use |
78.2 |
103kL |
Diesel |
60.1 |
Kerosene |
2.8 |
Heavy oil |
13.6 |
Gasoline |
1.7 |
Total electricity use |
159 |
106kWh |
Sites (construction sites) |
105 |
Factories |
32 |
Offices |
23 |
Total quantity of the main construction materials |
— |
— |
Ready mixed concrete |
1,012 |
103m3 |
Cement |
52 |
103t |
Aggregates (gravel, crushed stone, etc.) |
123 |
103t |
Steel |
421 |
103t |
Water (consumption) |
2,103 |
103m3 |
OUTPUT |
Total CO2 emissions (Scope1+2) |
283 |
103t-CO2 |
Sites (construction sites) |
213 |
Factories |
56 |
Offices |
14 |
Scope 1 |
218 |
103t-CO2 |
Scope 2 |
66 |
Construction by-products volume |
2,806 |
103t |
Quantity recycled |
2,699 |
Quantity of direct final disposal |
107 |
Water (discharged) |
4,021 |
103m3 |
Supply chain CO2 emissions (Scope3) |
Scope 3 |
5,642 |
103t-CO2 |
Category 1 |
1,655 |
Category 11 |
3,632 |
Other Categories |
355 |
Total CO2 emissions (Scope1+2) |
Taisei Corporation |
202 |
103t-CO2 |
Taisei Rotec Corporation |
75 |
TAISEI U-LEC CO., LTD. |
4 |
Five other companies |
3 |
Construction By-product volume |
Taisei Corporation |
2,434 |
103t |
Taisei Rotec Corporation |
305 |
TAISEI U-LEC CO., LTD. |
46 |
Five other companies |
21 |
TAISEI CORPORATION Material Flow
INPUT
Third-party assured values are indicated with the mark
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Total energy use |
109MJ |
4.39 |
3.60 |
3.77 |
3.24 |
3.26 |
Construction site (building) |
109MJ |
1.99 |
1.04 |
1.45 |
1.32 |
1.04 |
Construction site (civil engineering) |
109MJ |
2.18 |
2.35 |
2.10 |
1.70 |
2.03 |
Offices |
109MJ |
0.22 |
0.22 |
0.22 |
0.22 |
0.19 |
Total fossil fuel use |
103kL |
76.7 |
61.4 |
62.7 |
50.9 |
57.2 |
Diesel |
103kL |
75.2 |
60.0 |
62.2 |
45.1 |
51.7 |
Kerosene |
103kL |
0.6 |
0.9 |
0.5 |
0.9 |
0.7 |
Heavy oil |
103kL |
1.0 |
0.5 |
0.1 |
5.0 |
4.8 |
Total electricity use*1 |
106kWh |
145 |
122 |
136 |
125 |
120 |
Construction site (building) |
106kWh |
57 |
21 |
34 |
49 |
37 |
Construction site (civil engineering) |
106kWh |
73 |
87 |
85 |
59 |
67 |
Offices |
106kWh |
15 |
15 |
16 |
16 |
17 |
City gas (offices) |
103m3 |
213 |
259 |
165 |
118 |
46 |
GTL |
103kL |
— |
— |
— |
0.3 |
0.0 |
Quantity of the main construction materials*2 |
Ready mixed concrete*3 |
103m3 |
4,066 (103t) |
3,855 (103t) |
1,523 |
1,060 |
1,012 |
Cement |
103t |
263 |
172 |
120 |
66 |
52 |
Aggregates (gravel, crushed stone, etc.) |
103t |
2,514 |
387 |
315 |
155 |
123 |
Steel |
103t |
506 |
534 |
539 |
405 |
421 |
Water (consumption)*4 |
103m3 |
1,414 |
1,412 |
2,266 |
2,279 |
2,012 |
Construction site |
103m3 |
1,348 |
1,363 |
2,215 |
2,220 |
1,950 |
Offices |
103m3 |
66 |
49 |
51 |
59 |
62 |
Proportion by worksites water intake destination*5 |
Tap water / water for industrial use |
% |
82 |
67 |
22 |
57 |
91 |
River water / groundwater / etc. |
% |
18 |
33 |
78 |
43 |
9 |
Seawater |
% |
0 |
0 |
0 |
0 |
0 |
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
- *1Portion of renewable energy (power purchase、self-generating、purchasing non-fossil certificates) of total electricity use is 6GWh (5%)
- *2Until FY 2020, the contract quantities were tabulated. From FY2021, sales quantities for the four main construction materials (ready-mixed concrete, cement, aggregates, and steel) were tabulated. From 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.
- *3From FY 2018 through FY 2020, quantities have been shown as “103t”.
- *4Consumption = 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.
- *5Proportion calculated from intake quantities at sampled worksites.
OUTPUT
Third-party assured values are indicated with the mark
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Total CO2 emissions (Scope1+2) |
103t-CO2 |
267 |
216 |
224 |
189 |
202 |
Construction site (building) |
103t-CO2 |
124 |
66 |
91 |
78 |
64 |
Construction site (civil engineering) |
103t-CO2 |
133 |
140 |
123 |
101 |
129 |
Offices |
103t-CO2 |
10 |
10 |
10 |
10 |
9 |
At construction stage: CO2 emissions per sales |
t-CO2 / JPY 100 million |
18.8 |
19.1 |
19.1 |
14.4 |
15.0 |
Total CO2 emissions |
103t-CO2 |
267 |
216 |
224 |
189 |
202 |
Scope1*1 |
103t-CO2 |
198 |
159 |
162 |
133 |
151 |
Scope2 |
103t-CO2 |
69 |
57 |
61 |
56 |
51 |
NOX |
t |
1,302 |
1,039 |
1,085 |
813 |
934 |
SOX |
t |
200 |
158 |
162 |
151 |
168 |
Quantity of Fluorocarbon and Halon recovered*2 |
t |
21 |
— |
— |
— |
— |
Construction by-products |
103t |
2,411 |
1,787 |
1,976 |
2,012 |
2,434 |
Quantity recycled |
103t |
2,283 |
1,715 |
1,914 |
1,939 |
2,338 |
Quantity of direct final disposal |
103t |
128 |
71 |
62 |
73 |
96 |
Water (discharged)*3 |
103m3 |
4,288 |
6,625 |
9,677 |
3,014 |
3,948 |
Construction site |
103m3 |
4,228 |
6,578 |
9,627 |
2,955 |
3,886 |
Offices |
103m3 |
60 |
47 |
50 |
59 |
62 |
Proportion by worksite discharge destination*4 |
Sewer, etc. |
% |
34 |
19 |
11 |
66 |
95 |
River / lake / agricultural drainage ditch |
% |
65 |
77 |
89 |
33 |
5 |
Ocean |
% |
1 |
4 |
0 |
1 |
0 |
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
- *1Since in FY2021, in accordance with the Japan Federation of Construction Contractors guidelines, emissions at Taisei worksites from fuel are listed under Scope 3 until FY2020 were included in Scope 1.
- *2Until FY2019, the recovery quantities of fluorocarbons and halons have been tabulated, and disclosed (the recovery quantity of halons have been included until FY2018) in accordance with the Fluorocarbons Recovery and Destruction Act.
In FY2020, leak quantities were tabulated in accordance with the Act for Rationalized Use and Proper Management of Fluorocarbons. Negligible leak quantities are not disclosed.
- *3The 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 worksite.
Supply Chain CO2 Emissions (Scope3)
Third-party assured values are indicated with the mark
Category |
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Total CO2 emissions (Scope3) |
103t-CO2 |
— |
4,991 |
3,878 |
4,616 |
5,001 |
1. Purchased goods and services*1 |
103t-CO2 |
— |
1,347 |
1,283 |
1,889 |
1,455 |
2. Capital goods |
103t-CO2 |
— |
4 |
0 |
13 |
5 |
3. Fuel-and energy-related activities not included in Scope 1 or Scope2 |
103t-CO2 |
— |
32 |
33 |
28 |
25 |
4. Upstream transportation and distribution |
103t-CO2 |
— |
9 |
8 |
5 |
5 |
5. Waste generated in operations |
103t-CO2 |
— |
179 |
209 |
143 |
206 |
6. Business travel |
103t-CO2 |
— |
1 |
1 |
1 |
1 |
7. Employee commuting |
103t-CO2 |
— |
5 |
5 |
5 |
5 |
8. Upstream leased assets |
103t-CO2 |
— |
1 |
0 |
0 |
0 |
9. Downstream transportation and distribution |
103t-CO2 |
— |
— |
— |
— |
— |
10. Processing of sold products |
103t-CO2 |
— |
— |
— |
— |
— |
11. Use of sold products*2 |
103t-CO2 |
— |
3,371 |
2,284 |
2,495 |
3,262 |
12. End of life treatment of sold products |
103t-CO2 |
— |
40 |
51 |
35 |
34 |
13. Downstream leased assets |
103t-CO2 |
— |
5 |
5 |
3 |
2 |
14. Franchises |
103t-CO2 |
— |
— |
— |
— |
— |
15. Investments |
103t-CO2 |
— |
— |
— |
— |
— |
- *From FY2020 emissions, values based on the GHG Protocol, etc. are disclosed.
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
- *1Category 1
(1)For 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. Calculated using the emission factors 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)), until FY2022. From 2023, calculated using IDEAv3.3 and the emission factors of the figures that announced by Japan Cement Association LCI and Japan Society of Civil Engineers by environmentally friendly building materials. The calculation takes reduction effect of adopting the environmentally friendly building materials into consideration.
(2)FY2023 emissions using the calculation until FY2022 is 1,859×103t-CO2, and the discrepancy between the calculations is in reduction of 404×103t-CO2.
(3)FY2022 emissions using the same calculation as the one in FY2023 is 1,506×103t-CO2 (Third-party assurance has not acquired). This FY2022 emissions is used as the base year emissions in TAISEI Green Target 2050.
- *2Category 11
(1)Emission factor by building-purposes that calculated by emissions by floor area of projected CO2 emissions at the operational stage of 1990 standard is used until FY2022.
From FY2023, the BELS-certified projects are included in order that ZEB results be reflected in the category. Furthermore, to allow reduction effect through in-house effort to be reflected in the category, emission factor by building-purposes that calculated by emissions by floor area of projected CO2 emissions at the operational stage of 2022 standard was calculated using nationwide statistics of the standard primary energy consumption in the Act on the Rational Use of Energy as the standard primary energy.
(2)FY2023 emissions using the calculation until FY2022 is 1,913×103t-CO2, and the discrepancy between the calculations is in increase of 1,349×103t-CO2.
(3)FY2022 emissions using the same calculation as the one in FY2023 is 4,628×103t-CO2(Third-party assurance has not acquired). This FY2022 emissions is used as the base year emissions in TAISEI Green Target 2050.
Material Flow for Group Companies
INPUT
Third-party assured values are indicated with the mark
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Total energy use |
109MJ |
1.68 |
1.70 |
1.70 |
1.70 |
1.35 |
Sites (Construction site) |
109MJ |
0.32 |
0.37 |
0.42 |
0.47 |
0.29 |
Factories |
109MJ |
1.23 |
1.20 |
1.15 |
1.12 |
0.96 |
Offices |
109MJ |
0.12 |
0.13 |
0.12 |
0.12 |
0.09 |
Total fossil fuel use |
103kL |
26 |
27 |
27.4 |
26.7 |
20.9 |
Diesel |
103kL |
10 |
11 |
12.2 |
13.2 |
8.5 |
Kerosene |
103kL |
3 |
3 |
2.7 |
2.5 |
2.1 |
Heavy oil |
103kL |
11 |
11 |
10.8 |
9.0 |
8.8 |
Gasoline |
103kL |
2 |
2 |
1.7 |
1.9 |
1.7 |
Total electricity use |
106kWh |
43 |
43 |
43 |
42 |
39 |
Sites (Construction site) |
106kWh |
1 |
1 |
1 |
1 |
1 |
Factories |
106kWh |
35 |
35 |
35 |
35 |
32 |
Offices |
106kWh |
7 |
7 |
7 |
7 |
6 |
City gas |
103m3 |
5,692 |
5,056 |
4,169 |
4,589 |
4,035 |
GTL |
103kL |
— |
0 |
0.2 |
0.1 |
0.0 |
LPG |
t |
485 |
575 |
598 |
1,231 |
1,115 |
Water (consumption) |
103m3 |
138 |
109 |
102 |
111 |
91 |
- *Note: Data are from TAISEI Group Company is excluding TAISEI COPORATION (domestic).
OUTPUT
Third-party assured values are indicated with the mark
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Total CO2 emissions (Scope1+2) |
103t-CO2 |
101 |
102 |
101 |
102 |
81 |
Construction site |
103t-CO2 |
22 |
25 |
29 |
32 |
20 |
Factories |
103t-CO2 |
72 |
70 |
66 |
64 |
56 |
Offices |
103t-CO2 |
7 |
7 |
6 |
6 |
5 |
Total CO2 emissions |
103t-CO2 |
101 |
102 |
101 |
102 |
81 |
Scope1*1 |
103t-CO2 |
81 |
83 |
83 |
84 |
67 |
Scope2 |
103t-CO2 |
20 |
19 |
18 |
19 |
14 |
NOX |
t |
227 |
224 |
280 |
295 |
210 |
SOX |
t |
103 |
105 |
107 |
97 |
83 |
Quantity of Fluorocarbons and Halon leaked*2 |
t |
2 |
2 |
6 |
6 |
— |
Total industrial waste generated |
103t |
485 |
416 |
476 |
408 |
372 |
Quantity recycled |
103t |
475 |
406 |
465 |
397 |
361 |
Final disposal quantity |
103t |
10 |
10 |
11 |
12 |
11 |
Water (discharged) |
103m3 |
74 |
76 |
108 |
120 |
73 |
- *Note: Data are from TAISEI Group companies is excluding TAISEI COPORATION (domestic).
- *1From FY2021, in accordance with the Japan Federation of Construction Contractors guidelines, emissions at Taisei worksite from fuel are listed under Scope 3, which until FY2020 was included in Scope 1.
- *2The recovery quantities of fluorocarbons and halons have been tabulated, and disclosed (the recovery quantity of halons have been included until FY2018).
The recovery quantities of fluorocarbons and halons that have been emitted by the Group Companies have been tabulated, and disclosed (the recovery quantity of halons have been included until FY2018) in accordance with the Fluorocarbons Recovery and Destruction Act.
Leak quantities were tabulated in accordance with the Act for Rationalized Use and Proper Management of Fluorocarbons. Negligible leak quantities are not disclosed.
Supply Chain CO2 Emissions (Scope3)
Category |
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Supply Chain CO2 Emissions (Scope3) Total |
103t-CO2 |
— |
— |
753 |
668 |
641 |
1. Purchased goods and services |
103t-CO2 |
— |
— |
246 |
216 |
200 |
2. Capital goods |
103t-CO2 |
— |
— |
19 |
12 |
16 |
3. Fuel-and energy-related activities not included in Scope 1 or Scope2 |
103t-CO2 |
— |
— |
17 |
12 |
15 |
4. Upstream transportation and distribution |
103t-CO2 |
— |
— |
9 |
5 |
2 |
5. Waste generated in operations |
103t-CO2 |
— |
— |
13 |
18 |
10 |
6. Business travel |
103t-CO2 |
— |
— |
1 |
1 |
1 |
7. Employee commuting |
103t-CO2 |
— |
— |
1 |
1 |
1 |
8. Upstream leased assets |
103t-CO2 |
— |
— |
0 |
0 |
0 |
9. Downstream transportation and distribution |
103t-CO2 |
— |
— |
5 |
5 |
3 |
10. Processing of sold products |
103t-CO2 |
— |
— |
— |
— |
— |
11. Use of sold products |
103t-CO2 |
— |
— |
405 |
361 |
369 |
12. End of life treatment of sold products |
103t-CO2 |
— |
— |
9 |
7 |
5 |
13. Downstream leased assets |
103t-CO2 |
— |
— |
28 |
28 |
18 |
14. Franchises |
103t-CO2 |
— |
— |
— |
— |
— |
15. Investments |
103t-CO2 |
— |
— |
— |
— |
— |
- *From FY2021 emissions, values based on the GHG Protocol, etc. are disclosed.
- *Note: Data are from TAISEI Group Company is excluding TAISEI COPORATION (domestic).
Projected CO2 Emissions in the Building Operation Phase
Calculation according to 1990 standard
Third-party assured values are indicated with the mark
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Projected CO2 emissions |
103t-CO2 / year |
15 |
42 |
19 |
13 |
23 |
Calculated values according to 1990 standard |
103t-CO2 / year |
25 |
72 |
34 |
26 |
44 |
Discrepancy between projected CO2 and 1990 standard (rate) |
% |
39.5 |
41.4 |
44.6 |
49.8 |
46.6 |
Emissions by floor space |
kg-CO2 / year・m2 |
23 |
32 |
17 |
11 |
25 |
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
Calculation according to 2022 standard
Third-party assured values are indicated with the mark
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Projected CO2 emissions |
103t-CO2 / year |
— |
— |
— |
— |
35 |
Calculated values according to 2022 standard |
103t-CO2 / year |
— |
— |
— |
— |
49 |
Discrepancy between projected CO2 and 2022 standard (ratio) |
% |
— |
— |
— |
— |
28.7 |
Emissions by floor space |
kg-CO2 / year・m2 |
— |
— |
— |
— |
37 |
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
- *From FY2023, calculated values according to 1990 standard and 2022 standard are disclosed, respectively.
- *Key difference between the calculation according to 2022 standard and 1990 standard:
- -Changed that calculation of the standard primary energy from using the results of the Company to using nationwide statistics of the standard primary energy consumption in the Act on the Rational Use of Energy.
Total Construction By-product (Waste / valuable resources)
Total Construction By-products
Third-party assured values are indicated with the mark
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Total construction by-products |
103t |
2,411 |
1,787 |
1,976 |
2,012 |
2,434 |
Excluding sludge and specially controlled industrial wastes |
1,268 |
1,066 |
1,119 |
1,314 |
1,293 |
Final disposal quantity |
128 |
71 |
62 |
73 |
96 |
Excluding sludge and specially controlled industrial wastes |
74 |
51 |
38 |
42 |
62 |
Quantity recycled |
2,283 |
1,715 |
1,914 |
1,939 |
2,338 |
Excluding sludge and specially controlled industrial wastes |
1,194 |
1,016 |
1,082 |
1,272 |
1,231 |
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
Emissions (103t) and Recycle Rate by type (FY2023)
Third-party assured values are indicated with the mark
|
Civil engineering |
Building construction |
Total |
Recycling rate (%) |
New Construction |
Demolition |
Subtotal |
Concrete remnants |
223 |
216 |
392 |
609 |
832 |
100 |
Asphalt-concrete remnants |
45 |
48 |
7 |
55 |
100 |
100 |
Construction site sludge |
772 |
258 |
27 |
285 |
1,056 |
— |
Mixed waste |
41 |
27 |
5 |
32 |
73 |
78.1 |
Wood scrap |
13 |
8 |
4 |
11 |
24 |
94.8 |
Metal scrap |
2 |
15 |
19 |
34 |
36 |
99.2 |
Waste plastics |
1 |
5 |
1 |
6 |
7 |
66.7 |
Miscellaneous |
174 |
95 |
36 |
131 |
305 |
75.3 |
Total |
1,272 |
671 |
491 |
1,162 |
2,434 |
— |
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
Recycling Rate
Third-party assured values are indicated with the mark
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Concrete remnants |
% |
100 |
100 |
100 |
100 |
100 |
Asphalt- concrete remnants |
99.5 |
100 |
100 |
100 |
100 |
Wood scrap |
95.0 |
95.0 |
95.0 |
94.9 |
94.8 |
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
- *The above three items are specific construction material waste based on the Construction Material Recycling Act.
Management of Hazardous Wastes
Hazardous Waste Quantity
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Specially Controlled Industrial Wastes |
103t |
10 |
3 |
3 |
3 |
5 |
Waste asbestos, etc. |
2 |
1 |
3 |
3 |
4 |
Industrial wastes containing asbestos |
14 |
5 |
15 |
17 |
24 |
Mercury-using products |
0 |
0 |
0 |
0 |
0 |
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
PCB Wastes
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
Quantity of PCB wastes generated and discarded |
kg |
0 |
0 |
31 |
27 |
0 |
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
Volatile Organic Compounds (VOC discharge quantity)
|
Unit |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
FY2023 |
VOC emissions* |
— |
N/A |
N/A |
N/A |
N/A |
N/A |
- *Note: Data are from TAISEI Corporation (non-consolidated) (domestic).
- *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).
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 |
Scope1: CO2 emissions from burning of fossil fuels (including transport of surplus soil and construction by-products from worksites) Scope2: Indirect CO2 emissions from the use of power, steam or hot and cold water Scope3: CO2 emissions from other companies involved in business activities |
Taisei Corporation
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 338 sampled worksites and the consumption per unit of construction sales (basic unit) for the period was calculated. The worksites(excluded sampled 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, diesel alternative fuel(GTL,B5,etc.) 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 Scope1 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 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 0.437 t‐CO2/kWh, the post‐adjustment emissions factor of the figures (FY2022 CO2 emissions results (confirmed value)) announced by the Electric Power Council for a Low Carbon Society (ELCS). For offices, calculated using the post‐adjustment emission factor for the FY 2022 results for each electric power company.
Construction stage: CO2 emission per construction sales
- Calculated by dividing the CO2 emission of Taisei sites (Civil Engineering and Building Construction) 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 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-products |
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 emissions |
Calculation method / criteria |
CO2 emissions Scope3 |
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 factors 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)), IDEAv3.3, and the emission factors of the figures that announced by Japan Cement Association LCI and Japan Society of Civil Engineers.
- 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 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 (calculation for each use from past 3 year’s performance: calculated by emissions by floor area of projected CO2 emissions at the operational stage) and the service life (Comprehensive Assessment System for Building Environmental Efficiency (CASBEE) assessment manual).
|
Projected CO2 emissions at the building operation stage |
Calculation method / criteria |
Projected CO2 emissions |
103t-CO2 / year |
- -Of the buildings constructed by Taisei Corporation, emissions for the 1.2 million m2 from 53 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.
- -Of above, the projects with acquired certification of the Building-Housing Energy-efficiency Labeling System (BELS) were calculated using the value at the acquisition.
- -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.
- *Standard primary energy based on 1990 standard was calculated using the results of the Company.
- *Standard primary energy based on 2022 standard was calculated using nationwide statistics of the standard primary energy consumption in the Act on the Rational Use of Energy.
|
Calculated value based on 1990 and 2022 standard |
103t-CO2 / year |
Ratio of projected CO2 emissions to calculated value based on 1990 and 2022 stadard |
% |
Emissions by floor area |
kg-CO2 / year・m2 |
Emissions and recycle rate for construction By-products 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 (Gas to Liquids), 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 0.437 t‐CO2 / kWh, the post‐adjustment emissions factor of the figures (FY2022 CO2 emissions results(confirmed value)) announced by the Electric Power Council for a Low Carbon Society(ELCS). For offices, calculated using the post‐adjustment emission factor for the FY 2022 results for each electric power company.
|
Construction by-products |
103t |
Construction by‐product 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 Scope3 |
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 emissions 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)).
|