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Environmental Efficiency / Environmental Accounting


We conduct environmental efficiency assessments to quantitatively measure the efficiency of environmental conservation activities at our production and research sites. We also disclose information on environmental accounting in reference to the Environmental Accounting Guidelines 2005, issued by the Ministry of the Environment of Japan.


Assessment of Environmental Efficiency

We use an integrated indicator that can measure the reduction in environmental impact achieved through environmental conservation activities. To calculate this indicator, we classify environmental impacts generated from our activities into five categories: chemical substances, global warming, waste, water quality, and air quality. We then select a representative environmental factor for each of the categories and divide their amount of environmental impact by revenue in the relevant FY year. The result of this indicator is disclosed each year.
The environmental efficiency indicator for FY 2019 improved by 57.3 points compared to FY 2005. This is primarily because despite an increase in BOD and PRTR emissions from the previous year, the amount of waste landfilled decreased from the previous year due to waste reduction activities, including thorough separation of waste.
We will continue to strive to reduce environmental impact and thereby improve the environmental efficiency indictor.

Changes in the environmental efficiency indicator (Indicator with a score of 100 representing the level in FY2005)


Environmental Costs and Effects

Environmental investments made at our production and research sites during FY2019 were related to global warming prevention measures and other environmental measures.

Environmental Costs (Including Depreciation Costs)

(Thousands of Yen)
Category Environmental costs Amount of investment in environmental equipment
FY2018 FY2019 FY2018 FY2019
1: Pollution prevention cost (air, water, soil, groundwater, hazardous chemicals, noise, vibration, and odor) 118,662 161,626 668,927 16,062
2: Global environment conservation cost (cost for preventing global warming, cost for environmental conservation activities) 424,006 862,909 2,679,921 2,100,004
3: Resource circulation cost (waste reduction, proper treatment of waste, efficient use of resources) 91,983 107,254 7,570 207
4: Administration cost (time and cost spent for committee and ISO activities, and environmental management) 7,290 5,536
5: Research and development cost 130,436 115,961
6: Social activity cost (cost for environmental improvement activities, including beautification and tree-planting, with the exception of those conducted at or in the vicinity of the business sites) 1,835 3,668
Total 774,212 1,256,953 3,356,418 2,116,272

Environmental conservation effects

Environmental performance indicators Change in the amount of environmental impact Environmental impact
FY2018 FY2019 FY2018 FY2019
Effects corresponding to key business area costs SOx emissions (tons) 0 0 0 0
NOx emissions (tons) 0.57 -0.28 8.38 8.10
Water use (10,000 m3) 2.37 -5.12 33.29 28.17
BOD load (tons) -0.95 0.04 1.27 1.31
CO2 emissions (10,000 tons-CO2) -0.15 -0.15 2.52 2.37
Energy use (10,000 GJ) -0.11  8.26 52.54 60.80
Total waste discharge (tons) -361.04 -23.69 622.85 599.16
Final landfill disposal (tons) -8.69 -2.60 9.35 6.75

Economic Effects Associated with Environmental Conservation Activities

(Thousands of Yen)
Details Economic effects
FY2018 FY2019
1: Reduction in costs through energy-saving activities 11,703 3,954
2: Reduction in waste costs through recycling activities 0 0
3: Profit from sale of recycled materials 1,205 4,874
Annual total 12,908 8,828