Sustainability

Environment

Environmental Data Chemical substance Usage / Emissions

To help protect the environment, the OKI Group is active in seeking low environmental-impact chemical alternatives and in reducing chemical consumption.

Achievements in Fiscal 2023

Management of chemical substances used in production activities

As an example of water use at production sites in Japan, the water used in production processes is treated with chemicals to neutralize and render it harmless before being discharged. The chemical substances released into the atmosphere are mostly volatile organic compounds (VOCs) found in solvents used for cleaning parts in assembly plants. The OKI Group manages these substances by limiting the management to VOCs and substances specified by the PRTR Law, while also striving to substitute them with less environmentally impactful chemicals and reduce their usage.

Amount used and emitted of chemical substances

Amounts of Major PRTR* Chemical Substances Used (FY2023 unit: tons)
Name of chemical substance Amount handled Amount emitted Amount of movement
Atmosphere Public waters Soil in the workplace Subtotal Transfer to sewage system Taking out of office Subtotal Total
Antimony and its compounds 12.8 0.0 0.0 0.0 0.0 0.0 11.9 0.8 12.8
Ethylbenzene 2.5 1.8 0.0 0.0 1.8 0.0 0.0 0.8 0.8
Xylene 3.1 2.2 0.0 0.0 2.2 0.0 0.0 0.9 0.9
Cyclohexylamine 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Water-soluble copper salts (excluding complex salts) 284.0 0.0 0.1 0.0 0.1 0.0 0.0 8.5 8.5
1,2,4-Trimethylbenzene 0.6 0.4 0.0 0.0 0.4 0.0 0.0 0.2 0.2
Toluene 4.9 4.1 0.0 0.0 4.1 0.0 0.0 0.8 0.8
Lead and its compounds 0.8 0.0 0.0 0.0 0.0 0.0 0.1 0.2 0.3
Nickel compounds 11.1 0.0 0.0 0.0 0.0 0.0 1.1 1.2 2.4
Water-soluble salts of peroxodisulfuric acid 23.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Formaldehyde 14.3 0.4 0.0 0.0 0.4 0.0 0.0 1.6 1.6
Manganese and its compounds 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Methylenebis(4,1-phenylene)=diisocyanate 0.1 0.1 0.0 0.0 0.1 0.0 0.0 0.0 0.0
Total 359.1 8.9 0.1 0.0 9.0 0.0 13.2 15.0 28.2
  • * Chemical substance discharge grasp management promotion law

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