Water Resources
Water is a valuable resource that is directly linked to people's lives and livelihoods. Since the Hachioji Plant, which manufactures semiconductor manufacturing equipment, uses a large amount of water (pure water), we are working to conserve water resources by reducing water consumption and promoting water recycling.
Eco-Factory
Fiscal 2022 Targets and Results
| Objectives | Plans | Result (FY2022) |
| Reduction in water consumption (Water consumption production volume intensity reduction) |
5% reduction compared to FY2019 by FY2024 Year set 2020 Period FY2020 to FY2024 Benchmark 2.74 m³/million yen Reduction 2.60 m³/million yen |
1.48 ㎥/million yen (46% reduction compared to FY2019) |
Reduction of Water Consumption and Water Recycling
All of the water we use is provided using city water (surface water) and groundwater. In fiscal 2022, we used 164,150 ㎥ of water. At the Hachioji Plant in particular, wastewater volumes are increasing as the production volume of semiconductor manufacturing equipment that use a large amount of water (pure water) increases. As a result, a portion of the wastewater is collected and filtered to promote water recycling as raw water to serve as pure water.
Water Usage
|
|
FY2018 |
FY2019 |
FY2020 |
FY2021 |
FY2022 |
|
Amount of water usage (m³) |
157,375 |
171,706 |
169,873 |
163,662 |
164,150 |
|
Water usage production volume intensity |
2.05 |
2.74 |
2.29 |
1.61 |
1.48 |
Locations covered Hachioji Plant and Tsuchiura Plant
Wastewater Recycling Rate* from Pure Water Production Facilities
|
FY2019 |
FY2020 |
FY2021 |
FY2022 |
|
16.3% |
17.2% |
17.2% |
17.6% |
Locations covered Hachioji Plant
* Wastewater recycling rate: Amount recycled/amount used (= raw water input + amount recycled)
Water Risk Assessment
The areas around the Hachioji Plant and Tsuchiura Plant are in the Low-Medium class of water stress according to the Aqueduct assessment tools of the World Resources Institute (WRI). We will continue to regularly assess the presence or absenceof water risks in conjunction with the use of municipal hazard maps and take appropriate measures when manufacturing sites or raw material suppliers with high water risks are identified.
Water Quality Standards
Since all of our wastewater is general sewage, none of it is discharged into ocean waters or rivers. We thoroughly conduct wastewater management at each factory to preserve the water environment.
Water Quality Standards
| FY2019 | FY2020 | FY2021 | FY2022 | |
| BOD（t） | Below 3.55 | Below 2.75 | Below 1.87 | Below 2.76 |
| Nitrogen content (t) | Below 1.53 | Below 1.31 | Below 1.34 | Below 1.44 |
| Iodine consumption (t) | Below 0.71 | Below 0.71 | Below 0.82 | Below 0.81 |
| Suspended solids (t) | Below 5.87 | Below 5.49 | Below 3.21 | Below 3.78 |
| n-Hexane extract (t) | Below 0.13 | Below 0.02 | Below 0.02 | Below 0.05 |
| Phosphorus content (t) | Below 0.09 | Below 0.06 | Below 0.06 | Below 0.07 |
Locations covered Hachioji Plant
Environment・Society・Governance
