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Komatsu's Environmental and Social Activities Enhancing Quality of Life

Pursuing Environmental Management  Scope 3 Category 11

From actual data gathered by one of our group companies, KOMTRAX, Komatsu has gained perspective on the amount of CO2 emissions (Scope 3 Category 11) produced by our products 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

= (2012 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.

CO2 Emission Amount Total 29.0 million t-CO2/year
  • *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. Moreover, presumption of a category (3) goes into overseas data in part.

    As evident from the results above, emissions during product use makes up more than 90% of total emissions. This is almost the same result as the estimates for 2007.

    (See page 13 of Environmental and Social Report 2008)

    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).

    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

    CO2 Emission Amount Total 29.4 million t-CO2/year