Protecting the precious environment
Environmental accounting

We introduced environmental accounting in fiscal 2004 to get a grasp of environmental conservation activities in quantitative terms and promote such activities in an efficient manner.

Basic matters

Scope of calculations

Haseko Corporation's activities

  1. Completed works at 124 worksites (new building works: 105, demolition works: 19)
  2. Offices (Tokyo region: Shiba Head Office Building/Yokohama Branch/Haseko Technical Center, Kansai region: Osaka Hiranomachi Building, Nagoya Branch/Kyoto Branch)

Target period

April 1, 2020 to March 31, 2021
(Note: As for the 124 worksites of completed works, the target period covers the entire project period. This applies to the items marked with “*” on the tables shown below.)

Aggregation method

The following cost items were aggregated by using "Environmental Accounting Guidelines 2005 (Ministry of the Environment)" and "Environmental Accounting Guidelines in the Construction Industry 2002 (Japan Federation of Construction Contractors)" as reference.

  1. Business area costs
    1. Pollution prevention costs: Costs for measures to prevent air pollution, water contamination, noise, vibration, etc. were aggregated.
    2. Global environmental conservation costs: Costs for measures to prevent global warming, save energy, prevent the destruction of the ozone layer, etc. were aggregated.
    3. Resource circulation costs: Costs for waste separation/recycling and appropriate processing, etc. were aggregated.
  2. Upstream/downstream costs
    Labor costs incurred in proposing environment-conscious designs were aggregated.
  3. Administration costs
    Costs for environmental conservation management activities, including CSR activities, and ISO14001 implementation and maintenance costs were aggregated.
  4. R&D costs
    Costs for research and technological development related to environmental conservation were aggregated.
  5. Social activity costs
    Costs for making donations, providing assistance, etc. to environmental groups and local communities were aggregated.
  6. Environmental remediation costs
    Costs for repairing the surrounding environment and other relevant expenses were aggregated.

Environmental conservation costs

Classification Description of main activities Amount of costs (million yen)
FY2016 FY2017 FY2018 FY2019 FY2020
Business area costs*   4,191 4,006 5,216 5,958 4,689
(1) Pollution prevention costs Costs for measures to prevent pollution at worksites 392.8 559.2 519.9 598.6 765.2
(2) Global environmental conservation costs Costs for stop-idling campaigns and costs for appropriate processing of CFC 13.4 21.2 13.5 10.2 7.6
(3) Resource circulation costs Costs for separation, recycling and appropriate processing of construction waste 3,784.8 3,425.2 4,683 5,349.8 3,916.6
Upstream/downstream costs Labor costs for environment-conscious designs 10.9 8.8 12.3 11.6 9.3
Administration costs ISO14001 registration/examination/implementation costs
Labor costs for ISO14001 activities
Costs for monitoring and measuring environmental impact
Environmental education costs
413.9 260.8 377.1 288.5 248.2
R&D costs Costs for research and technological development related to environment-related technologies 88.3 94.9 108 204.8 187
Social activity costs Donations to environmental groups and local communities 0.4 0.6 0.4 2.5 6.0
Environmental remediation costs* Costs for repairing surrounding environment and manifest purchasing expenses (fund portion) 144.5 76.6 110 74.4 55.6
Total environmental conservation costs 4,849 4,447 5,824 6,539 5,195

Environmental conservation effects Item

Item Unit FY2016 FY2017 FY2018 FY2019 FY2020
Business area effects Construction activities Volume of construction waste discharged* thousand tons 520.2 538.3 565.5 666.9 616.8
Volume of construction waste recycled* thousand tons 498.7 532.7 538.8 660.6 608.1
Final disposal volume of construction waste* thousand tons 21.5 5.6 26.7 6.3 8.7
CO2emissions (new building construction) thousand tons-CO2 28.9 34.7 36.6 30.4 38.9
Office activities Electricity usage thousand kWh 6,222 6,347 6,386 7,053 7,743
Copy paper usage ten thousand sheets 1,813 1,841 1,778 1,791 1,134
CO2emissions t-CO2 2,113 2,159 2,165 2,382 2,642
General waste discharged tons 80.1 57.0 44.3 43.7 38.4
Upstream/downstream Green procurement Steel for electric furnace (reinforcing steel) thousand tons 194 203 228 198 187
Blast furnace cement and freshly-mixed concrete thousand m3 255 176 225 210 208
Recycled tiles thousand m2 310 302 356 329 226
Recycled plasterboards thousand m2 4,055 4,566 4,765 4,793 4,537
Particle boards (double flooring) thousand m2 96 189 255 247 267
Styrene materials (wall-backing packing) m3 326 395 419 366 377
Water-saving toilet bowl thousand units 18 16 20 15 15
Rooftop and wall greening thousand m2 9 11 11 9 1
Permeable paving thousand m2 21 16 26 23 30
SUS piping (water supply piping in communal areas) t 98 84 53 29 21
LED lighting equipment thousand units 194
Long vinyl sheets thousand m2 297 280 383 369 293
Extruded polystyrene foam thousand m3 4 4 4 4 4
CFC-free urethane form thousand m2 389 720 890
Green purchase rate of stationery % 93.1 93.8 93.9 93.5 90.4

* Upstream/downstream effects of green procurement have been calculated for CFC-free urethane foam since fiscal 2018, and LED lighting equipment in fiscal 2020.

Results of Calculation

  1. The environmental conservation costs in fiscal 2020 totaled 5,195 million yen, a decrease of 1,344 million yen or 20.6% from fiscal 2019.
  2. 90.3% of the environmental conservation costs was accounted for by the “business area costs,” 83.5% of which was the “resource circulation costs.” The resource circulation costs decreased by 1,433.2 million yen or 26.8% from fiscal 2019.
  3. The volume of construction waste discharged decreased by 50,300 tons or 7.5% from fiscal 2019.
  4. CO2 emissions from construction activities (new building construction) was 38,900 tons-CO2. This figure accounts for the CO2 emissions from all the construction projects underway in the period of April 1, 2020 to March 31, 2021, in accordance with the GHG Protocol, and the basis for this figure is different from that for previous data in terms of target scope and period.
  5. Copy paper usage in office activities was 11,340,000 sheets, a decrease of 6,570,000 sheets or 36.7% from fiscal 2019.
  6. CO2 emissions from office activities was 2,642 tons-CO2, an increase of 260 tons-CO2 or 10.9% from fiscal 2019.