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Site data

Hofu Plant

Nishinoura District

Nishinoura District

Nishinoura District

Address: 888-1 Nishinoura, Hofu-shi, Yamaguchi, Japan
Operations started: September 1982
Major products: Passenger cars
ISO14001 certification: September 1998
Site area (floorspace): 792,000 square meters (297,000 square meters)


  • Atmospheric pollutants
Atmospheric pollutants Unit Regulation Actual(max.)
NOx Boilers ppm 150 43
130 56
Drying ovens ppm 230 100
Ash Boilers g/m³N 0.10 0.002
Drying ovens g/m³N 0.35 0.006
0.30 0.012
0.20 0.006
SOx K-value regulation - 4.5 0.001
Total pollutant load control m³N/h 35.92 0.014
VOC Painting facilities ppm 700 320
  • Water pollutants (Wastewater Drainage Destination: Oumi Bay)
Water pollutants Unit Regulation Actual
Max. Min. Avg.
pH - 5.0~9.0 7.2 6 6.8
COD mg/L 40 10.3 1.4 5.8
SS mg/L 30 1.8 ND <0.9
Oil mg/L 2 ND ND ND
Zinc mg/L 2 0.68 0.05 0.4
Copper mg/L 3 0.01 <0.01 <0.01
Phenol mg/L 1 0.02 <0.02 <0.02
Soluble manganese mg/L 3 0.4 <0.1 <0.2
Total nitrogen mg/L 60 10.5 0.6 3.8
Total phosphorus mg/L 8 2.89 0.07 1.18
Coliform groups colonies/cm³ 3,000 120 3 62
Boron mg/L 230 0.5 ND <0.3
Fluorine mg/L 15 2.2 1.2 1.7
Ammonia, ammonium, nitrous acid, and nitrous acid compounds mg/L 100 2.8 1.4 2.1

The following substances were not detected: cadmium, cyanogen, organic phosphorus, lead, hexavalent chromium, arsenic, mercury, alkyl mercury, PCBs trichloroethylene, tetrachloroethylene, dichloromethane, carbon tetrachloride, 1,2-dichloroethane, 1,1-dichloroethylene, 1,2-dichloroethylene, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,3-dichloropropene, thiuram, simazine, thiobencarb, benzene, selenium, 1,4-dioxane, soluble iron, and chromium.

  • Volume of PRTR-designated Pollutants Emitted and Transferred in FY March 2014

Items marked with an asterisk (*) are Class 1 designated chemical substances of which 500 kg/year or more are handled.
Other items are Class 1 designated chemical substances of which 1,000 kg/year or more are handled.
Unit:(kg/year)

Substance No. Substance group Amount handled   Volume emitted Amount consumed Amount disposed Amount transferred Amount recycled
Air Water Soil Waste products
1 Water-soluble zinc compounds 17,922 0 287 0 287 15,664 1,971 0 0
53 Ethyl benzene 115,941 71,462 0 0 71,462 31,667 12,812 0 0
80 Xylene 316,271 140,212 0 0 140,212 132,140 32,773 0 11,146
296 1,2,4-trimethylbenzene 137,748 25,951 0 0 25,951 82,322 12,117 0 17,358
297 1,3,5-trimethylbenzene 24,499 12,848 0 0 12,848 1,439 3,878 0 6,334
300 Toluene 540,435 210,541 0 0 210,541 275,132 20,644 0 34,118
309* Nickel compounds 3,514 0 422 0 422 1,212 0 1,880 0
355 Bis (2-ethylhexyl) phthalate 2,759 0 0 0 0 2,676 83 0 0
392 n-Hexane 90,883 228 0 0 228 90,655 0 0 0
400* Benzene 16,335 20 0 0 20 16,315 0 0 0
411* Formaldehyde 4,529 1,623 0 0 1,623 0 2,906 0 0
412 Molybdenum and its compounds 4,749 0 259 0 259 2,990 0 1,480 20
Total 1,275,585 462,885 968 0 463,853 652,212 87,184 3,360 68,976

Nakanoseki District

Nakanoseki District

Nakanoseki District

Address: 415-8 Hamakata, Hofu-shi, Yamaguchi, Japan
Operations started: December 1981
Major products: Transmissions
ISO14001 certification: September 1999
Site area (floorspace): 537,000 square meters (100,000 square meters)


  • Atmospheric pollutants
Atmospheric pollutants Unit Regulation Actual(max.)
NOx Melting furnaces ppm 180 24
Ash Heating furnaces g/m³N 0.25 <0.002
0.2 <0.002
Melting furnaces g/m³N 0.2 0.033
SOx K-value regulation - 4.5 0.04
Total pollutant load control m³N/h 17.47 0.74
  • Water pollutants (Wastewater Drainage Destination: Oumi Bay)
Water pollutants Unit Regulation Actual
Max. Min. Avg.
pH - 5.0~9.0 7.8 6.7 7.6
COD mg/L 40 8.5 5 6.9
SS mg/L 30 16 1 6.2
Oil mg/L 2 ND ND ND
Zinc mg/L 2 0.19 0.1 0.15
Total nitrogen mg/L 60 21 2.4 8.5
Total phosphorus mg/L 8 0.64 0.03 0.16
Coliform groups colonies/cm³ 3,000 2 0 <1
Boron mg/L 230 ND ND ND
Fluorine mg/L 15 0.3 0.12 0.21
Ammonia, ammonium, nitrous acid, and nitrous acid compounds mg/L 100 7.9 5.4 6.7

The following substances were not detected: cadmium, cyanogen, lead, hexavalent chromium, arsenic, mercury, alkyl mercury, trichloroethylene, tetrachloroethylene, dichloromethane, carbon tetrachloride, 1,2-dichloroethane, 1,1-dichloroethylene, 1,2-dichloroethylene, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,3-dichloropropene, thiuram, simazine, thiobencarb, benzene, selenium, 1,4-dioxane, phenol, copper, soluble iron, soluble manganese, and chromium.

  • Volume of PRTR-designated Pollutants Emitted and Transferred in FY March 2014

No applicable chemical substances subject to reporting. (The volume of the PRTR-designated groups' substances handled is less than the designated volume subject to reporting.)

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