Data on Environmental Impacts of Business Activities

CY2023 Key Performance

CY2023 Key Performance
CY2023 Key Performance

Changes in Environmental Impact Data Over Time

Although the environmental impact has been increased due to plant expansion, water and chemical substance usage and waste decreased along with decreased production volume and improved production efficiency in 2023.
GHGs increased in 2023 due to an increase in purchased electricity and higher CO2 emission factor.

  •  GHG Emissions (Scopel,Scope2)

    Unit:Tons-co2

    GHG Emissions

  •  Water Usage (Purchased volume)

    Unit:TCM

    Water Usage

  •  PRTR Chemical Substances Usage

    Unit:Tons

    PRTR Chemical Substances Usage

  •  Industrial Waste

    Unit:Tons

    Indust rial Waste

※The CO2 conversion coefficients for electricity consumption are calculated using emission factor provided by electric suppliers.

Greenhouse Gas (GHG) Emissions in 2023

USJC has calculated our GHG emissions in accordance with ISO14064-1:2018 and our carbon footprint (CFP) in accordance with ISO14067:2018. We will use this information to proactively engage in decarbonization with our customers.

  • Calculation period
    January 1, 2023 -December 31, 2023
  • Total GHG emissions
    357,691 t-CO2e
  • CFP
    1,294.2 ㎏-CO2e per sheet

※CFP:GHG Emissions per wafer USJC manufactured.

Breakdown

Category of Emission GHG Emissions (t-CO2e) Percentage (%)
Scope 1 Direct GHG Emissions 32,351 9
Scope 2 Indirect GHG Emissions from Supplied Energy 163,451 45.7
Scope 3 Indirect GHG Emissions other than Scope1 or Scone2 161,889 45.3
Total Amount of Emissions 357,691 100.0
Breakdown of Scope3 GHG Emissions (t-CO2e) Percentage (%)
Category 1 Purchased Products and Services 57,179 35.3
Category 2 Capital Goods 76,920 47.5
Category 3 Fuel and Energy Activities not included in Scope1 or Scope2 25,438 15.7
Category 4 Transportation, Distribution ( Upstream) 344 0.2
Category 5 Waste Generated in Operation 280 0.2
Category 6 Business Travel 144 0.1
Category 7 Employee Commuting 1,528 0.9
Category 8 Transportation, Distribution (Downstream) 55 0

Since 2022, the global warming potential (GWP) of the IPCC 6th Assessment Report has been applied.
In addition, a part of Scope 3 was calculated using "National Research and Development Agency, National Institute of Advanced Industrial Science and Technology, Safety Science Research Division IDEA Ver.3.2."

Greenhouse Gas (GHG) Emissions in 2022

Water Footprint in 2023

USJC has calculated our water footprint (WFP) in accordance with ISO 14046:2014. We will use this information as our customers, and we work toward sound use and conservation of water resources proactively by visualizing the amount of water used in our supply chain.

  • Comprehensiveness
    Non-Comprehensive Water Footprint
  • Calculation Period
    January 1, 2023 - December 31, 2023

※WFP:Water Usage per wafer USJC manufactured

Breakdown

Usage Phase Green Water
(㎡/wafer)
Blue Water
(㎡/wafer)
Gray Water
(㎡/wafer)
Total
(㎡/wafer)
Supplier Phase 0.0 8.3 50.0 58.3
Manufacturing Phase 0.0 15.0 13.4 28.4
Total Volume Usage 0.0 23.3 63.4 86.7
Water Footprint in 2022
Water Footprint in 2022
  • Supplier Phase 58.9%
  •  Blue Water
  •  Gray Water
  • Manufacturing Phase 41.1%
  •  Blue Water
  •  Gray Water

Citing the Calculation Methodology of The Water Footprint Assessment Manual (2011)

Green Water
Rainwater withdrawal
Blue Water
Water withdrawal other than rainwater
Gray Water
Amount of wastewater discharged when the pollution concentration of wastewater is diluted until it becomes equal to the environmental standard of the discharge water body(Indicators used: BOD, COD, total nitrogen, total phosphorus, SS)

In addition, part of the WFP at the raw material procurement stage was calculated using "National Research and Development Agency, National Institute of Advanced Industrial Science and Technology, Safety Science Research Division IDEA Ver.3.2."

Reduce Discharges of VOCs

USJC strives to reduce our environmental impact by preventing the release of harmful substances into the atmosphere as we properly remove organic exhaust-gases containing VOCs using activated carbon adsorption facilities.
Installation of a VOC activated carbon adsorption facility in March 2023 has improved VOC removal capacity and significantly reduced VOC emissions in 2023 compared to the previous year.

  •  VOC emissions

    Unit:Tons

    VOC emissions

  • SDGs12 Responsible Consumption and Production

Reduce PFCs Emissions

We have been making effort to reduce GHG emissions other than CO2 (PFC, HFC, NF3, SF6). On production lines, catalytic decomposition systems have been installed on all equipment producing GHG, and we aggressively promote GHG emission reduction.
We strive to improve the accuracy of calculations gradually in order to identify emissions more properly by changing the calculation method to the 2019 revision of the IPCC Guidelines since 2021.

  •  PFCs Emissions

    Unit:Tons-co2

    PFCs Emissions

  • SDGs12 Responsible Consumption and Production

    SDGs 13 Climate Action