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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 869
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 2016.

Major Performance

Environmental impact Energy consumption
Item Actual value Item Actual consumption Converted to calorie equivalents (GJ)
Total CO2 emissions 43,070 t-CO2 Electricity 85,900 MWh 842,233
NOx total amount 7,530 kg Heavy oil A 1,313 kl 51,353
SOx total amount 1,435 kg Kerosene 511 kl 18,744
Total emissions of waste 4,514 t Light oil 185 kl 7,061
Amount recycled 4,509 t Town gas 0 Nkm3 0
Recycling rate 100 % LPG 1,590 t 79,811
BOD emissions 1,169 kg Other   0
COD emissions 1,906 kg Total   999,202
Wastewater 710,552 m3
Output of in-house power generation 0 MWh
Water consumption
Item Actual value
Groundwater 710,552 m3
Industrial water 0 m3
Supply water 19,339 m3
Total 729,891 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 200 170
  ppm Annealing furnace (small) 180 51
  ppm Calciners 220 11
Sulfur oxides (SOx) - K-value regulation 17.5 1.03
Soot and dust g/m3N Annealing furnace 0.25 0.01
  g/m3N Annealing furnace (small) 0.2 0.01 or less
  g/m3N Calciners 0.15 0.01
  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 8.4 6.6 7.6
BOD (Biochemical oxygen demand) 160 mg/l 25 5.3 ND 1.6
COD (Chemical Oxygen Demand) 160 mg/l 160 3.9 1.8 2.6
Suspended solids (SS) 200 mg/l 90 8 ND 3.1
Mineral oils 5 mg/l 5 1.7 ND 0.6
Copper 3 mg/l 1 ND ND ND
Zinc 2 mg/l 2 ND ND ND
Nitrogen 120 mg/l 120 6.6 1.4 4.0
Phosphorus 16 mg/l 16 1.6 0.1 0.5
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 0.1 mg/l 0.1 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, Sewerage 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.