Sustainability

Environmental

Overall Perspective of Environmental Impact

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.

FY2019 NGK Group Material Balance (Input and Output)

Category Item Unit FY2017 FY2018 FY2019
Consolidated Non-consolidated Consolidated Non-consolidated Consolidated Non-consolidated
INPUT Electric power GWh 880 230 930 250 950 250
Gas (natural gas conversion) Million Nm3 140 19 142 20 137 19
Oil (light oil conversion) Million L 2.55 0.27 2.11 0.28 1.74 0.30
Raw materials 103 metric tons 192 36 180 35 147 28
Recycled materials 103 metric tons 4.4 4.4 3.8 3.8 3.8 3.8
PRTR-listed substances Metric tons 707 232 694 219 589 236
Total water usage Million m3 4.32 1.50 4.53 1.60 4.33 1.55
OUTPUT Energy-origin CO2 103 metric tons of CO2 932 156 960 164 960 157
Other greenhouse gases 103 metric tons of CO2 5 1 5 1 5 2
CO2 (non-energy origin) 103 metric tons of CO2 1 1 0 0 0 0
CH4 103 metric tons of CO2 1 1 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 4 0 4 1 3 0
SF6 103 metric tons of CO2 0 0 0 0 0 0
VOC Metric tons 145.3 0.0 119.7 0.0 68.4 0.2
PRTR-listed substances (emissions into atmosphere) Metric tons 154.2 2.4 127.5 2.8 76.3 2.6
Discarded materials 103 metric tons 59 11 58 11 54 11
Recycled 103 metric tons 44 11 43 11 43 11
Disposed of externally 103 metric tons 15 0 16 0 11 0
Total water discharge Million m3 2.87 1.31 2.81 1.37 3.14 1.40
PRTR-listed substances (discharge into bodies of water) Metric tons 0.4 0.4 0.3 0.3 0.5 0.5
Scope 1 (energy-origin CO2) 103 metric tons of CO2 320 43 323 44 309 43
Scope 2 (energy-origin CO2) 103 metric tons of CO2 612 113 637 120 651 114
Notes:
  • Environmental performance values in this report 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).
  • Fiscal 2017 non-consolidated CO2 emissions have been revised so that calculation uses the CO2 conversion factor stipulated under enforcement orders of Japan’s Act on Promotion of Global Warming Countermeasures.
  • There was an error in adding up fiscal 2018 VOC emissions values, but this has been corrected.
  • There was an error in adding up fiscal 2018 consolidated PRTR values (emissions into atmosphere), but this has been corrected.

Reporting Scope 3 CO2 Emissions

Starting in fiscal 2017, NGK has been calculating Scope 3 emissions on a non-consolidated upstream basis in response to emerging expectations for businesses to expand the relevant data reporting scope to include supply chain CO2 emissions levels. In fiscal 2019, NGK confirmed that the total volume of CO2 emission from NGK logistics was 977,000 metric tons, which was over six times more than the 157,000 metric tons of NGK in-house CO2 emissions (sum of Scope 1 and 2), and that Category 1 (purchased goods and services) amounted to over 80% of total CO2 emissions. NGK will continue to develop calculation methods that can ascertain CO2 emission levels in relation to a greater range of items.
Please note that the calculation used for Scope 3 data was carried out in accordance with Basic Guidelines Regarding the Calculation of Greenhouse Gas Emissions through the Supply Chain (Ver. 2.2) (Ministry of the Environment; Ministry of Economy, Trade and Industry).

Scope 3 GHG Emissions

Category Item Unit FY2017 FY2018 FY2019
Non-consolidated Non-consolidated Non-consolidated
1 Purchased goods and services (including resale items) 103 metric tons of CO2 762 863 842
2 Capital goods 103 metric tons of CO2 84 152 99
3 Fuel- and energy-related activities 103 metric tons of CO2 16 18 16
4 Upstream transportation and distribution 103 metric tons of CO2 11 8 14
5 Waste generated in operations 103 metric tons of CO2 1 3 2
6 Business travel 103 metric tons of CO2 1 1 1
7 Employee commuting 103 metric tons of CO2 2 2 2
8 Upstream leased assets 103 metric tons of CO2 0 0 0
Total   103 metric tons of CO2 877 1047 977

Water Withdrawal by Source, Water Discharge by Destination, Recycled Amount, Recycling Rate

Item Unit FY2017 FY2018 FY2019
Consolidated Non-consolidated Consolidated Non-consolidated Consolidated Non-consolidated
Water
withdrawal
Municipal government water utility (or other water utility) Million m3 3.69 1.06 3.91 1.14 3.71 1.08
Groundwater Million m3 0.63 0.44 0.62 0.47 0.62 0.47
Surface water (lakes, rivers, etc.) Million m3 0.002 0.0 0.002 0.0 0.001 0.0
Total Million m3 4.322 1.502 4.532 1.610 4.331 1.550
Water
discharge
Sewerage Million m3 0.73 0.20 0.71 0.19 0.66 0.20
Rivers, lakes, etc. Million m3 2.14 1.11 2.10 1.18 2.48 1.20
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 2.87 1.31 2.81 1.37 3.14 1.40
Recycled amount   Million m3 0.09 0.0 0.09 0.0 0.09 0.0
Recycling rate   % 2.04 0.00 1.95 0.00 2.04 0.00

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 in Japan based on the Act on Promotion of Global Warming Countermeasures;

United States: 0.709; Belgium: 0.292; France: 0.061; Poland: 0.986; South Africa: 1.096; China: 0.983; Thailand: 0.687;

Indonesia: 0.790; Australia: 1.390; Mexico: 0.741; Malaysia: 0.543

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