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Water Resources

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
emissions

2.74 m³/million yen

Reduction
target

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
(㎥/million yen)

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




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TOP Sustainability Environment
Water Resources