Sustainability
Environmental Performance
Environmental Performance Overview
The following shows the inputs (raw materials and energy) and outputs (products, services, and substance emissions to the water and air) which are related to the business activities of all NGK Group locations in Japan and overseas.
NGK Group Material Balance (inputs and outputs)
Category | Substance | Unit | FY2019 | FY2020 | FY2021 | |||
---|---|---|---|---|---|---|---|---|
Consolidated | Non-consolidated | Consolidated | Non-consolidated | Consolidated | Non-consolidated | |||
INPUT | Electric power | TWh | 0.95 | 0.25 | 0.88 | 0.22 | 0.98 | 0.23 |
Gas (natural gas conversion) | Million Nm3 | 137 | 19 | 116 | 17 | 137 | 16 | |
Oil (light oil conversion) | Million L | 1.74 | 0.30 | 1.65 | 0.31 | 1.64 | 0.29 | |
Raw materials | 104 metric tons | 15 | 3 | 14 | 3 | 16 | 2 | |
Recycled materials | 104 metric tons | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
PRTR | Metric tons | 589 | 236 | 506 | 188 | 447 | 186 | |
Water withdrawal | Million m3 | 4.33 | 1.55 | 3.78 | 1.45 | 4.37 | 1.41 | |
OUTPUT | Energy-origin CO2 | 104 metric tons of CO2 | 87 | 16 | 76 | 13 | 63 | 12 |
Energy-origin CO2 (including effects of CN LNG)*1 | 104 metric tons of CO2 | - | - | - | - | 62 | 10 | |
Other greenhouse gases | 104 metric tons of CO2 | 1 | 0 | 0 | 0 | 0 | 0 | |
CO2 (non-energy origin CO2) | 104 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
CH4 | 104 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
N2O | 104 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
HFC | 104 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
PFC | 104 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
SF6 | 104 metric tons of CO2 | 0 | 0 | 0 | 0 | 0 | 0 | |
VOC | Metric tons | 68 | 0 | 83 | 0 | 77 | 1 | |
PRTR-listed substances (emissions into atmosphere) | Metric tons | 76 | 3 | 89 | 3 | 84 | 2 | |
Discarded materials | 104 metric tons | 5 | 1 | 5 | 1 | 5 | 1 | |
Recycled | 104 metric tons | 4 | 1 | 4 | 1 | 4 | 1 | |
Disposed of externally | 104 metric tons | 1 | 0 | 1 | 0 | 1 | 0 | |
Water discharge | Million m3 | 3.14 | 1.40 | 2.53 | 1.09 | 2.74 | 1.03 | |
PRTR-listed substances (discharge into bodies of water) | Metric tons | 1 | 1 | 0 | 0 | 1 | 1 | |
Scope 1 (energy-origin CO2) | 104 metric tons of CO2 | 31 | 4 | 26 | 4 | 31 | 4 | |
Scope 1 (including effects of CN LNG)*1 | 104 metric tons of CO2 | - | - | - | - | 29 | 2 | |
Scope 2 (energy-origin CO2) | 104 metric tons of CO2 | 56 | 11 | 49 | 10 | 33 | 9 |
Value subject to third-party assurance by Deloitte Tohmatsu Sustainability Co., Ltd.
Note: The figures indicating environmental performance in this table have been rounded off for convenience, so the total may not equal the sum of the individual figures.
Note: Discarded materials indicates the sum total of industrial waste and valuable resources.
Note: The figures in the non-consolidated column are the data for NGK production locations (Head Office/Nagoya Site, Chita Site, Komaki Site, Ishikawa Plant).
Note: As with the non-consolidated values, the emission factor for electricity in the consolidated values of Outputs/Energy-origin CO2 (including effects of CN LNG) and Scope 2 (energy-origin CO2), has been changed from a fixed value to the actual value from the power company for each fiscal year, beginning in FY2020.
*1 CN LNG (Carbon Neutral Liquid Natural Gas) is LNG that is offset with CO2 credits, and thus considered to have no CO2 emissions. However, we show it as a separate category because it does not qualify for credits under current energy conservation laws.
Water Withdrawal, Water Discharge, and Recycling Rate
Water Withdrawal by Source, Water Discharge by Destination, Volume Recycled, and Recycling Rate
Item name | Unit | FY2019 | FY2020 | FY2021 | ||||
---|---|---|---|---|---|---|---|---|
Consolidated | Non-consolidated | Consolidated | Non-consolidated | Consolidated | Non-consolidated | |||
Water withdrawal | Tap water/industrial water | Million m3 | 3.710 | 1.080 | 3.135 | 0.949 | 3.720 | 0.982 |
Groundwater | Million m3 | 0.620 | 0.470 | 0.640 | 0.497 | 0.614 | 0.391 | |
Rainwater | Million m3 | 0.001 | 0.000 | 0.002 | 0.000 | 0.002 | 0.000 | |
Total | Million m3 | 4.331 | 1.550 | 3.777 | 1.445 | 4.336 | 1.373 | |
Water discharge | Rivers | Million m3 | 0.828 | 0.354 | 0.734 | 0.296 | 0.733 | 0.301 |
Lakes | Million m3 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | |
Sea | Million m3 | 1.618 | 0..847 | 1.201 | 0.630 | 1.218 | 0.529 | |
Sewerage | Million m3 | 0.419 | 0.195 | 0.376 | 0.165 | 0.458 | 0.164 | |
Factory complex processing | Million m3 | 0.241 | 0.000 | 0.207 | 0.000 | 0.238 | 0.000 | |
Other | Million m3 | 0.013 | 0.0 | 0.017 | 0.000 | 0.057 | 0.000 | |
Total | Million m3 | 3.140 | 1.400 | 2.534 | 1.092 | 2.704 | 0.994 | |
Volume recycled | Million m3 | 0.090 | 0.000 | 0.066 | 0.000 | 0.063 | 0.000 | |
Recycling rate | % | 2.0 | 0.0 | 1.7 | 0.0 | 1.5 | 0.0 |
INPUT
1. Energy
- Electric power:
- electric power consumption
- 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, but in China from FY2021: 38.9 MJ/Nm3
City gas: 45.0 MJ/Nm3, but from FY2021 city gas other than for NGK alone: 44.8 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 value of light oil)
<Unit heating value of fuel gas>
Light oil: 37.7 MJ/L, Heavy oil A: 39.1 MJ/L, Kerosene: 36.7 MJ/L, Gasoline: 34.6 MJ/L
2. Water withdrawal
Total tap water, industrial water, groundwater, and rainwater
3. PRTR-listed substances
Total quantity of Japan’s PRTR Type 1 listed substances handled
4. Raw materials
Total amount of raw materials used to manufacture products
OUTPUT
5. Energy-origin CO2 emission volume
Energy-origin CO2 emission volume = Σ (Consumption of each type of energy × CO2 conversion factor of each type of 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
US (other than NMC, FMI California, NL): Green-e value; US (NMC, FMI California, NL): Green-e value / value published by electric company*
Belgium, France: AIB value
Australia: Australian National Greenhouse Accounts value, Poland: AIB value / Poland National Centre for Emission Management* value, China: IEA value / Ministry of Ecology and Environment of the Republic of China value*, IEA values for other countries - Fuel:
- Natural gas in China (Nm3) 2.22/2.16*, Natural gas outside China (Nm3) 2.22, City gas for NGK alone(Nm3) 2.244/2.29*, City gas other than for NGK alone (Nm3) 2.23,
LPG (kg) 3.00, LNG (kg) 2.70, Light oil (L) 2.58, Heavy oil A (L) 2.71, Kerosene (L) 2.49, Gasoline (L) 2.32, Industrial steam (MJ) 0.06
- * Data to left of “/” is for FY2019 and FY2020, data to right is for FY2021
6. Emission volume of other greenhouse gases
Emission volume of other greenhouse gases (tCO2) = volume of activity × emission coefficient × Global warming potential
<Global warming potential>
CO2: 1, CH4: 25, N2O: 298, HFC: differs depending on type, PFC: differs depending on type, SF6: 22800, NF3: 17200
7. Water discharge
Total volume of water discharged. However, this does not include the rainwater discharge volume.
8. PRTR-listed substances
Discharge into bodies of water: Total amount of Japan’s PRTR Type 1 listed substances discharged into public bodies of water
Emissions into atmosphere: Total amount of Japan’s PRTR Type 1 listed substances 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)
- *1 Externally disposed amount: Direct disposal by landfill, or simple incineration
- *2 Paid disposal: Outsourcing disposal and paying for recycling
10. Scope 1 through 3
- Scope 1: Direct emissions of greenhouse gases by the reporting company (generated from industrial processes or the burning of fuel)
- Scope 2: Indirect emissions of greenhouse gases by the reporting company resulting from the use of electricity, steam, or heat purchased from other companies
- Scope 3: All other indirect emissions of greenhouse gases (not included in Scope 1 or 2) that occur in the reporting company’s value chain
Scope 3 GHG Emissions
Because it has become necessary to ascertain the CO2 emissions of supply chains in recent years, since FY2017 NGK has calculated its non-consolidated upstream emissions for Scope 3 (from category 1 through category 8).
Starting in FY2021 the entire NGK Group began calculating Scope 3 emissions for all categories (category 1 through category 15, excluding those which do not apply to NGK), and in FY2021 they totaled 3.449 million metric tons.
This is the first calculation for the entire NGK Group, and we were able to see the outline and scope for each category. Hereafter we will determine the important categories and consider what kind of efforts we can make towards reductions. In addition, in April 2022, NGK submitted a commitment letter to the SBTi (Science Based Targets initiative), the certification organization for Science Based Targets (SBT). Going forward, we will formulate a reduction plan for Scope 3 in addition to Scope 1 and 2. Once our science based targets (SBT) have been approved, we will actively encourage our suppliers to pursue CO2 emissions reductions.
Scope 3 GHG Emissions
Category | Division | Unit | FY2019 | FY2020 | FY2021 |
---|---|---|---|---|---|
Non-consolidated | Non-consolidated | Consolidated | |||
1 | Purchased products and services | 104 metric tons of CO2 | 84.2 | 77.0 | 178.8 |
2 | Capital goods (capital investment) | 104 metric tons of CO2 | 9.9 | 9.0 | 13.4 |
3 | Energy | 104 metric tons of CO2 | 1.6 | 1.5 | 8.6 |
4 | Transport (upstream) | 104 metric tons of CO2 | 1.4 | 1.3 | 18.8 |
5 | Waste | 104 metric tons of CO2 | 0.2 | 0.2 | 1.2 |
6 | Business trips | 104 metric tons of CO2 | 0.1 | 0.1 | 0.3 |
7 | Employee commutes | 104 metric tons of CO2 | 0.2 | 0.2 | 0.9 |
8 | Leased assets (upstream) | 104 metric tons of CO2 | ー | ー | ー |
9 | Transport (downstream) | 104 metric tons of CO2 | ー | ー | ー |
10 | Processing of sold products | 104 metric tons of CO2 | ー | ー | ー |
11 | Use of sold products | 104 metric tons of CO2 | ー | ー | 122.6 |
12 | Disposal of sold products | 104 metric tons of CO2 | ー | ー | 0.4 |
13 | Leased assets (downstream) | 104 metric tons of CO2 | ー | ー | ー |
14 | Franchises | 104 metric tons of CO2 | ー | ー | ー |
15 | Investment | 104 metric tons of CO2 | ー | ー | ー |
Total | 104 metric tons of CO2 | 97.7 | 89.3 | 344.9 |