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Komatsu's Environmental and Social Activities Data

Site Data (Japan)  Komatsu Castex Ltd.


Year of Establishment 1952
Location Himi, Toyama Prefecture
Main Products Iron castings, steel castings, molds for casting, etc.
Site/Green Landscape (1,000 m2) 433/104
Number of employees 942
Date of ISO14001 certification acquisition January 2000
* The number of employees includes those working for Komatsu affiliates on the premises.
* The number of employees as of the end of March 2015.

Major Performance

Environmental impact Energy consumption
Item Actual value Item Actual consumption Converted to calorie equivalents (GJ)
Total CO2 emissions 51,118 t-CO2 Electricity 101,622 MWh 989,428
NOx total amount 5,291 kg Heavy oil A 1,338 kl 52,299
SOx total amount 1,419 kg Kerosene 764 kl 28,027
Total emissions of waste 6,017 t Light oil 228 kl 8,692
Amount recycled 6,010 t Town gas 0 Nkm3 0
Recycling rate 100 % LPG 1,991 t 99,966
BOD emissions 1,166 kg Other   0
COD emissions 1,570 kg Total   1,178,411
Wastewater 741,599 m3
Output of in-house power generation 0 MWh
Water consumption
Item Actual value
Groundwater 750,599 m3
Industrial water 0 m3
Supply water 26,377 m3
Total 776,976 m3
* Refer to the Data on Environmental Impact Resulting from Business Activities for details on the methods used to calculate amounts.
* Total emissions of waste are expressed as a composite of the amount recycled (excluding valuables) and the amount disposed.
* Recycling rate is calculated by dividing the amount recycled (including valuables) by the amount generated (including valuables).
* Total emissions of BOD and COD are calculated by multiplying the average concentration by the amount of wastewater.

* The heat energy conversion factor is calculated in keeping with Greenhouse Gas Emission Calculation - Reporting Manual, which is based on the act on Promotion of Global Warming Countermeasures.

Compliance Conditions to Major Regulations

Item Unit Facility Regulated value Actual value
Nitrogen oxides (NOx) ppm Annealing furnace 200 161
  ppm Annealing furnace (small) 180 7 or less
  ppm Calciners 220 24
Sulfur oxides (SOx) - K-value regulation 17.5 3.01
Soot and dust g/m3N Annealing furnace 0.25 0.01 or less
  g/m3N Annealing furnace (small) 0.2 0.01 or less
  g/m3N Calciners 0.15 0.01 or less
  g/m3N Arch furnace 0.1 0.01 or less
* Regulated values are in accordance with the Air Pollution Control Law and local regulations.
Item Regulated value according to the Water Pollution Control Law Regulated value Actual value
Maximum Minimum Average
pH 5.8-8.6 5.8-8.6 8.6 7.1 7.7
BOD (Biochemical oxygen demand) 160 mg/l 25 4 ND 1.5
COD (Chemical Oxygen Demand) 160 mg/l 160 3.6 1.3 2.3
Suspended solids (SS) 200 mg/l 90 45 ND 5.6
Mineral oils 5 mg/l 5 0.9 ND 0.6
Copper 3 mg/l 1 ND ND ND
Zinc 2 mg/l 2 ND ND ND
Nitrogen 120 mg/l 120 7.4 1.7 4.3
Phosphorus 16 mg/l 16 2.1 ND 0.9
Cadmium 0.03 mg/l 0.03 ND ND ND
Lead 0.1 mg/l 0.1 ND ND ND
Chromium (VI) 0.5 mg/l 0.5 ND ND ND
Trichloroethylene 0.3 mg/l 0.3 ND ND ND
Tetrachloroethylene 0.1 mg/l 0.1 ND ND ND
Dichloromethane 0.2 mg/l 0.2 ND ND ND
1,1,1-trichloroethane 3 mg/l 3 ND ND ND
* Regulated values are in accordance with the Water Pollution Control Law and local regulations.
* ND ("not detected") indicates a value below the lower limit of detection.
* ND is considered to be the lower limit of detection when calculating the average.
* Other items are confirmed to be below the regulated value.