Resource Recycling Initiatives

Basic Approach

Throughout our product life cycle, KOITO is actively working to effectively use raw materials, energy, and other resources, and to reduce water consumption and waste.
The KOITO Group will continue to actively promote "Eco-friendly Manufacturing for People and the Earth," and strives to materialize a recycle-oriented society.

Effective Use of Water Resources

Recognizing the importance of water resources in production activities and the risks that future economic growth, population growth, and climate change would have effect on water resources, KOITO has identified "conservation of water resources" as one of our materiality. KOITO is working on the effective use of water resources and protecting water quality.
We have set our target for water consumption per unit of production*, to reduce 7% from the amount in FY 2019 (3.51 tons per million yen) by FY 2026, and we are promoting activities aimed at further reductions.
We have worked to enhance the awareness of employees toward water conservation and improving the efficiency of water consumption in the production processes. As a result, the water usage per unit in FY 2023 was 9.3% lower and the amount of water consumption was 15% lower than FY 2019.
KOITO is also conducting water quality monitoring on the wastewater discharged from production sites to prevent water pollution in rivers or other bodies of water into which production sites wastewater is discharged.

  Water usage per unit: The amount of water consumption (tons) per production output (million yen)

Amount of Water Consumption and Water Usage Per Unit

data unit FY 2018 FY 2019 FY 2020 FY 2021 FY 2022 FY 2023
Water consumption t 878,485 837,013 780,102 672,239 654,026 711,431
Original unit of water usage t/million yen 4.12 3.76 3.58 3.26 3.41 3.41
Discharge volume t 207,601 221,482 200,447 163,573 142,963 161798
Discharge volume t/million yen 0.97 1.00 0.92 0.79 0.75 0.77

Efforts in Reducing Wastes and Recycling

KOITO is working on efficient recycling of materials (including waste, valuable materials, and recycled materials) discharged from all plants. After achieving zero-waste* in all plants in 2002, KOITO has been promoting waste reduction by setting the waste generated per unit as an index for recycling, mainly of plastics, and for efficient use of resources in production.

Zero-waste: A situation in which no waste is directly disposed of as landfill within the waste discharged by the plant.

Efforts to Reduce the Amount of Waste from Production Sites and the Waste Generated per Unit

KOITO generated 5,293 tons of waste from plants in FY 2022, among which 2,297 tons were processed as waste*1.
KOITO is promoting activities with the aim of further reducing waste per unit*2 by 7% from the unit in FY 2019 (0.128 tons per billion yen), a base year, as a target by FY 2026.
The waste generated per unit (the amount of waste per production output) was 0.120 tons per billion yen in FY2022, which was 34% lower than FY 2019 due to the continuous efforts to reduce the loss of defective resins.

*Waste: Emissions for which disposal costs are incurred and disposal is outsourced to a disposal contractor.

Amount of Emissions and Wast (per unit) from Production Sites

data unit FY 2018 FY 2019 FY 2020 FY 2021 FY 2022 FY 2023
Volume of discharges t 6,934 6,946 6,651 5,544 5,293 5,477
Amount of waste Total waste volume t 2,949 3,055 2,909 2,407 2,297 2,321
industrial waste subject to special control t 129 119 137


125 105
Other t 2,820 2,936 2,772 2,267 2,172 2,215
Waste basic unit t/billion yen 1.38 1.37 1.33 1.17 1.20 1.11

Promotion of recycling

KOITO is working to improve the recycling rate (reduction of heat-utilizing waste, etc.). In FY 2023, the amount recycled was 5,164 tons, maintaining a recycling rate of over 90%.