Sustainability
Environmental Performance
The table below shows aggregate inputs to and outputs from manufacturing operations of the entire NGK Group at all domestic and overseas sites. Inputs represent data for raw materials and energy etc. and outputs for manufactured products and services as well as substances that are discharged into the atmosphere and into water.
FY2020 NGK Group Material Balance (Input and Output)
| Category | Item | Unit | FY2018 | FY2019 | FY2020 | |||
|---|---|---|---|---|---|---|---|---|
| Consolidated | Non-consolidated | Consolidated | Non-consolidated | Consolidated | Non-consolidated | |||
| INPUT | Electric power | TWh | 0.93 | 0.25 | 0.95 | 0.25 | 0.88 | 0.22 |
| Gas (natural gas conversion) | Million Nm3 | 142 | 20 | 137 | 19 | 116 | 17 | |
| Oil (light oil conversion) | Million L | 2.11 | 0.28 | 1.74 | 0.30 | 1.65 | 0.31 | |
| Raw materials | 103 metric tons | 180 | 30 | 150 | 30 | 140 | 30 | |
| Recycled materials | 103 metric tons | 0 | 0 | 0 | 0 | 0 | 0 | |
| PRTR-listed substances | Metric tons | 694 | 219 | 589 | 236 | 506 | 188 | |
| Total water usage | Million m3 | 4.53 | 1.60 | 4.33 | 1.55 | 3.78 | 1.45 | |
| OUTPUT | Energy-origin CO2 | 106 metric tons of CO2 | 0.87 | 0.16 | 0.87 | 0.16 | 0.76 | 0.13 |
| Other greenhouse gases | 103 metric tons of CO2 | 1 | 0 | 1 | 0 | 0 | 0 | |
| CO2 (non-energy origin) | 103 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
| CH4 | 103 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
| N2O | 103 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
| HFC | 103 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
| PFC | 103 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
| SF6 | 103 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
| VOC | Metric tons | 120 | 0 | 68 | 0 | 83 | 0 | |
| PRTR-listed substances (emissions into atmosphere) | Metric tons | 128 | 3 | 76 | 3 | 89 | 3 | |
| Discarded materials | 103 metric tons | 60 | 10 | 50 | 10 | 50 | 10 | |
| Recycled | 103 metric tons | 40 | 10 | 40 | 10 | 30 | 10 | |
| Disposed of externally | 103 metric tons | 20 | 0 | 10 | 0 | 10 | 0 | |
| Total water discharge | Million m3 | 2.81 | 1.37 | 3.14 | 1.40 | 2.53 | 1.09 | |
| PRTR-listed substances (discharge into bodies of water) | Metric tons | 0 | 0 | 1 | 1 | 0 | 0 | |
| Scope 1 (energy-origin CO2) | 106 metric tons of CO2 | 0.32 | 0.04 | 0.31 | 0.04 | 0.26 | 0.04 | |
| Scope 2 (energy-origin CO2) | 106 metric tons of CO2 | 0.55 | 0.12 | 0.56 | 0.11 | 0.49 | 0.10 | |
- Notes:
-
- Environmental performance values in this data book have been rounded off for convenience; therefore the sum of individual values may not match the totals.
- “Discarded materials” indicates the total amount of industrial waste and valuables.
- Figures in the non-consolidated column indicate data from non-consolidated NGK production bases (Headquarters, Nagoya Site, Chita Site, Komaki Site, Ishikawa Plant).
- For the consolidated values of OUTPUT/energy-origin CO2 and Scope 2 (energy-origin CO2), as with the non-consolidated values, the calculation standard has been changed from the previous fixed value for the emission coefficient of electricity (a factor for converting electricity consumption into CO2) to annually updated values of each electric power supplier.
Water Consumption and Recycling Rate
Water Withdrawal by Source, Water Discharge by Destination, Recycled Amount, Recycling Rate
| Item | Unit | FY2018 | FY2019 | FY2020 | ||||
|---|---|---|---|---|---|---|---|---|
| Consolidated | Non-consolidated | Consolidated | Non-consolidated | Consolidated | Non-consolidated | |||
| Water withdrawal |
Municipal government water utility (or other water utility) | Million m3 | 3.91 | 1.14 | 3.71 | 1.08 | 3.13 | 0.949 |
| Groundwater | Million m3 | 0.62 | 0.47 | 0.62 | 0.47 | 0.64 | 0.497 | |
| Surface water (lakes, rivers, etc.) | Million m3 | 0.002 | 0.0 | 0.001 | 0.0 | 0.002 | 0.0 | |
| Total | Million m3 | 4.532 | 1.610 | 4.331 | 1.550 | 3.777 | 1.445 | |
| Water discharge |
Sewerage | Million m3 | 0.71 | 0.19 | 0.66 | 0.20 | 0.60 | 1.65 |
| Rivers, lakes, etc. | Million m3 | 2.10 | 1.18 | 2.48 | 1.20 | 1.935 | 0.92 | |
| Waste | Million m3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Ground permeation | Million m3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Total | Million m3 | 2.81 | 1.37 | 3.14 | 1.40 | 2.534 | 1.092 | |
| Recycled amount | Million m3 | 0.09 | 0.0 | 0.09 | 0.0 | 0.066 | 0.0 | |
| Recycling rate | % | 2.0 | 0.0 | 2.0 | 0.0 | 1.7 | 0.0 | |
INPUT
1.Energy
- Electric power:
- Consumption amount of electric power
- Gas:
- Consumption volume of each type of fuel gas converted into natural gas volume =Σ(Consumption volume of each fuel gas × Unit heating value of each fuel gas/Unit heating value of natural gas)
<Unit heating value of fuel gas>
Natural gas: 43.5 MJ/Nm3 City gas: 45.0 MJ/Nm3
LPG: 50.8 MJ/kg LNG: 54.6 MJ/kg
- Oil:
- Consumption volume of each type of fuel converted into light oil volume =Σ(Consumption volume of each fuel × Unit heating value of each fuel/Unit heating volume of light oil)
<Unit heating value of fuel>
Light oil: 37.7 MJ/L Fuel oil A: 39.1 MJ/L Kerosene: 36.7 MJ/L Gasoline: 34.6 MJ/L
2.Water
Total consumption volume of city water, industrial water, well water, and rainwater
3. PRTR-listed substances
Total amount handled of Japan’s PRTR Type 1 listed substances
4. Raw materials
Total weight of raw materials used in product manufacturing
OUTPUT
5. Energy-origin CO2 emission volume
Energy-origin CO2 emission volume = Σ(Consumption of each energy × CO2 conversion factor of each energy)
<CO2 conversion factor of energy>
(Unit of electric power factor: kgCO2/kWh Unit of fuel factor: kgCO2/fuel unit)
- Electric power
-
Japan: Emission coefficient for each electric utility adjusted in Japan based on the Act on Promotion of Global Warming Countermeasures;
United States: Green-e values; Belgium, France, Poland: AIB values;
Australia: Australian National Greenhouse Accounts values;
other countries: IEA values
- Fuel
-
Natural gas (Nm3): 2.22; City gas (NGK on a non-consolidated basis) (Nm3): 2.244;
City gas (except NGK on a non-consolidated basis) (Nm3): 2.23; LPG (kg): 3.00; LNG (kg): 2.70; Light oil (L): 2.58;
Fuel oil A (L): 2.71; Kerosene (L): 2.49; Gasoline (L): 2.32; Industrial steam (MJ): 0.06
6. Emission volume of other greenhouse gases
Emission volume of other greenhouse gases = Active mass × Emission factor × Global warming potential
<Global warming potential>
CO2: 1; CH4: 25; N2O: 298; HFC: Differs by type; PFC: Differs by type; SF6: 22800; NF3: 17200
7.Water discharge
Total amount of discharged water excluding rainwater
8.PRTR-listed substances
Discharge into bodies of water: Total amount of Class 1 substances listed under Japan’s PRTR Act discharged into public bodies of water
Emissions into the atmosphere: Total amount of Class 1 substances listed under Japan’s PRTR Act emitted into the atmosphere
9.Total amount of discarded materials generated
Total amount of discarded materials generated = Externally disposed amount*1 + Externally recycled amount
Recycled amount: Externally recycled amount = Paid disposal*2 + Valuable amount (selling off)
- Externally disposed amount: Direct disposal by landfill, or simple incineration
- Paid disposal: Outsourcing disposal and paying for recycling
10.Scope 1 to 3
- Scope1:
- Direct emissions of greenhouse gases by the reporting company (generated from the burning of fuel or industrial processes)
- Scope2:
- Indirect emissions of greenhouse gases by the reporting company resulting from the use of electricity, steam, or heat purchased from other companies
- Scope3:
- All other indirect emissions of greenhouse gases (not included in Scope 1 or 2) that occur in the reporting company’s value chain