Current Status of Environmental Impact and Environmental Targets and Outcomes

Current Status of Environmental Impact

The following tables outline the environmental impact (material balance) of the manufacturing activities at KIOXIA Group.
Although the environmental burden shows an increasing trend, as we are increasing production capacity in response to the growing demand for communications infrastructure, we continue to work on reducing this burden by means of various initiatives.
For details of the environmental impact of Yokkaichi Plant and its environmental activities, see the “Yokkaichi Plant Environmental Report.”



  FY2018 FY2019 FY2020
Chemicals1 (tons) 47,661 47,147 56,418
    - VOC2 (tons) 15,031 14,208 16,985
    - PRTR3 (tons) 6,220 5,946 7,214
City water4
(thousand m3)
78 30 59
Industrial water4
(thousand m3)
19,463 19,766 22,764


  FY2018 FY2019 FY2020
Greenhouse gas (thousand tons) 2,065 2,186 2,365
Chemicals1 (tons) 653 518 639
    - VOC2 (tons) 623 479 599
    - PRTR3 (tons) 2 3 3
Waste (tons) 80,203 81,211 93,914
    - Recycled volume (tons) 56,309 61,268 67,925
Wastewater (thousand m3) 14,777 14,733 17,300
NOx (tons) 28.0 27.0 28.7
SOx (tons)

1 Chemicals targeted for reduction

2 VOC (volatile organic compounds): Causative agents such as IPA and butyl acetate that generate photochemical smog.

3 PRTR (pollutant release and transfer register): A system to ascertain, compile and disclose data on hazardous chemical substances (such as water-soluble zinc compounds, 2-aminoethanol, silver and its water-soluble compounds, etc.) discharged into the environment from any source or transported from work sites in waste.

4 All fresh water

Targets and Outcomes

KIOXIA Group promotes business activities that contribute to the sustainability of society by setting its own environmental targets and objectives. The following table summarizes the environmental targets of KIOXIA for FY2020 and their achievement status.


We again achieved all environmental targets in FY2020 thanks to our energy-saving activities promoted across the organization and our efforts to reduce the amounts of used and discarded chemical substances at our flash memory manufacturing plants. We are also actively engaging in social contribution activities with employee participation and biodiversity conservation activities, primarily at our manufacturing plants.


We adopted the “rate of change of environmental impacts per unit of GB (gigabyte) from FY2013 basis” as our target, excluding the reduction of CO2 emissions from energy sources. Accompanying our plans for production line expansion, the environmental impact of KIOXIA’s activities is expected to increase in FY2021 compared with the previous year, and our cross-functional environmental initiatives will continue.

Environmental targets and objectives FY2020 Target FY2020 Result FY2020 Achievement Status
Development of products, the manufacturing of which has a reduced environmental impact Reducing the environmental impact of production processes through miniaturization of devices 3 or more measures per year 3 measures
Mitigation of global warming Reduction of CO2 emissions from energy sources ≥ 17,686 t-CO2 20,103t-CO2
PFC emissions
(Rate of change from FY2013)
≤ 68.9% 63.9%
Promoting efficient use of resources Total amount of waste generated minus amount of valuable waste
(Rate of change from FY2013)
≤ 32.6% 31.9%
Total waste generated
(Rate of change from FY2013)
≤ 23.0% 22.4%
Water intake
(Rate of change from FY2013)
≤ 25.5% 24.8%
Reduction of environmental risk Emissions of chemical substances to air and water
(total amount, rate of change from FY2013)
≤ 23.2% 21.7%
Biodiversity conservation Biodiversity conservation Periodic monitoring of indicator species Periodic monitoring of indicator species
Promotion of environmental communication Social communication Charity eco bazaars, collection of recyclable waste, donations, etc. Held charity bazaars, collected recyclable garbage, made donations, etc.
Community communication Local communication Communicated with local people (e.g., meetings with local residents' associations)
Raising environmental awareness Raising environmental awareness Measures for raising awareness Held awareness-raising programs (e.g., monthly environmental events)

(✔: Achieved, ×: Not achieved)

Effective Use of Resources

Although the amount of waste generated is tending to increase as the scale of our factories expands, we are improving our manufacturing processes and taking other steps to promote reductions in the volume of chemicals and gas used.

We are also proactively engaged in recycling waste materials generated and expanding recovery of valuable resources.

Collection and Reusing of Fluorite

By processing waste materials generated during the product manufacturing process, we collect resources and extract value from them, thereby reducing the amount of waste sent to landfill. We have reduced the amount of sludge containing hydrofluoric acid by about 30% by treating the hydrofluoric acid wastewater generated in the manufacturing process at an artificial fluorspar manufacturing facility and recovering it in the form of calcium fluoride (artificial fluorite). The artificial fluorite recovered is used as an alternative to fluorite, an imported natural resource, and is a fluorinated material used by fluorinated product manufacturers. These efforts contribute to reducing the import volume of fluorite, which is a rare resource.

Waste Recycling (Calcium Fluoride)
Waste Recycling (Calcium Fluoride)