Environmental Data (FY2022)
TAISEI CORPORATION Annual Environmental Targets
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 (intensity) |
-38% |
-47.5% |
-41% |
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 per project or more |
12.8 items per project |
12 items per project or more |
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 |
- 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)).
|