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Komatsu's Environmental and Social Activities Enhancing Quality of Life

Pursuing Environmental Management Amount of CO2 Emissions by Scope 3

From actual data gathered by KOMTRAX, Komatsu has gained perspective on the amount of CO2 emissions (Scope 3 Category 11) produced by our products manufactured in FY2015 in operation world-wide.
The calculation was performed as follows.

Calculation of Emissions from Customer Use

(1) Calculate the following by each model

  CO2 emissions over the life of each model

= (FY2015 Production Volume) × (Fuel Consumption; L/kWh) × (Engine Output; kW)
× (Engine Life; as product life; h) × (CO2 Conversion Factor)

(2) Calculated for each model in (1) above, Total these values
*For models available to collect fuel consumption, KOMTRAX collected the actual values of fuel consumption and operating time from representative models of each size. We back calculated data from development for other models.

For others, including the 14 remaining categories, the general CO2 emissions was calculated. The result is shown in the pie chart below.

Pie chart of Scope3
Stacked bar chart of Scope3

  • *1 :LCA is the environmental impact assessment method for individual products at each stage, from manufacture, transportation, sale, use, disposal, to reuse
  • *2 :Scope1 is direct CO2 emissions by operator(ex: private power generation)
  • *3 :Scope2 is indirect CO2 emissions by operator(ex: power purchase)
  • *4 :Scope3 is CO2 emissions by operator from supply chain (ex: emissions of product during operation, emissions from suppliers, transportation, business trips and commuting)

Amount of CO2 Emissions Data by Scope 3
- Although it is calculating in the total range of domestic and an overseas in calculation of each category, the category (4) and (5) is calculating only domestic data. The category (13) is included in category (11). Moreover, presumption of a category (3) goes into overseas data in part.

As evident from the results above, emissions during product use makes up approximately 90% of total emissions.

From this, we can see that fuel-efficient products have a significant effect on reducing CO2 emissions.

Komatsu is committed to developing hybrid construction machinery (improving fuel efficiency by 25%) and DANTOTSU products (over 10% improvement in fuel efficiency) and accelerating the pace of the ICT-based SMART CONSTRUCTION.

In addition, the result of the understanding in the LCA * 1 (Life Cycle Assessment) is the pie chart below.

Pie Chart of Scope1, 2, 3

Pie chart of Scope1, 2, 3
Stacked barchart of Scope1, 2, 3