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Hiroshima District

Hiroshima Plant

Hiroshima Plant

Hiroshima Plant

Address: 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima, Japan
Operations started: March 1931
Major products: Passenger cars, trucks, engines, automobile manual transmissions
ISO14001 certification: June 2000
Site area (floorspace): 2,247,000 square meters (1,796,000 square meters)


Atmospheric pollutants Unit Regulation Actual
NOx Boilers ppm 230 200
180 83
150 63
Drying ovens ppm 250 90
230 15
Melting furnaces ppm 180 98
Diesel engines ppm 950 380
Heating furnaces ppm 200 23
180 47
150 91
130 55
Roasting furnaces ppm 220 46
Ash Boilers g/m3N 0.30 0.018
0.25 0.099
0.10 0.0033
Drying ovens g/m3N 0.40 0.0059
0.35 0.0021
0.20 0.0019
0.15 0.006
Melting furnaces g/m3N 0.40 0.056
0.20 0.08
0.10 0.0039
Diesel engines g/m3N 0.10 0.023
Heating furnaces g/m3N 0.40 0.0026
0.25 0.001
0.20 0.02
Roasting furnaces g/m3N 0.10 0.0032
SOx K-value regulation - 7 2.12
VOC Painting facilities ppm 700 354
Washing facilities ppm 400 88

Wastewater drainage destination: Enko River and Kaita Bay

Water pollutants Unit Regulation Actual
Max. Min. Avg.
pH (freshwater) - 5.8-8.6 7.7 6.5 7.1
pH (seawater) - 5.5-9.0 7.6 6.6 7.1
BOD mg/L 120 4.6 ND <1.5
COD mg/L 15 11 1.3 4.1
SS mg/L 150 18 ND <3.5
Oil mg/L 5 ND ND ND
Copper mg/L 3 0.01 ND <0.01
Fluorine (freshwater) mg/L 8 0.2 ND <0.1
Fluorine (seawater) mg/L 15 5.9 ND <2.7
Zinc mg/L 2 1.3 ND <0.26
Soluble iron mg/L 10 ND ND ND
Soluble manganese mg/L 10 0.7 ND <0.3
Total nitrogen mg/L 60 9.8 2.1 5.3
Total phosphorus mg/L 8 0.7 ND <0.1
Coliform groups Colonies/cm3 3000 1100 <10 <40
Phenol mg/L 5 0.06 ND <0.02
Chromium mg/L 2 0.04 ND <0.01
Hexavalent chromium mg/L 0.5 0.02 ND <0.02
Boron (freshwater) mg/L 10 0.45 0.3 0.38
Boron (seawater) mg/L 230 2 0.3 1.0
Ammonia, ammonium, nitrous acid, and nitrous acid compounds mg/L 100 5.1 0.8 2.4

The following substances were not detected: cadmium, cyanogen, organic phosphorus, lead, arsenic, mercury, alkyl mercury, PCBs, trichloroethylene, tetrachloroethylene, dichloromethane, carbon tetrachloride, 1.2-dichloroethane, 1.1-dichloroethylene, cis 1.2-dichloroethylene, 1.1.1-trichloroethane, 1.1.2-trichloroethane, 1.3-dichloropropene, thiuram, simazine, thiobencarb, benzene, and selenium.

(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.)


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 19,946 0 315 0 315 16,030 0 3,601 0
29 4,4'-isopropylidenediphenol 3,325 0 0 0 0 0 3,325 0 0
30 Polymer of 4,4'-isopropylidenediphenol and 1-chloro-2,3-epoxypropane (in liquid state only) 2,809 0 0 0 0 2,809 0 0 0
40 Ethyl benzene 194,079 102,769 0 0 102,769 49,468 39,890 0 1,952
43 Ethylene glycol 1,619,715 10 0 0 10 1,619,705 0 0 0
63 Xylene 728,143 277,705 0 0 277,705 210,053 149,220 0 91,165
68 Chromium and trivalent chromium compounds 85,159 0 0 0 0 83,818 0 1,339 2
69* Hexavalent chromium compounds 3,273 0 0 0 0 1,934 1,339 0 0
198 1,3,5,7-tetraazetoricyclo 3.3.1.13.7] decane 110,297 0 0 0 0 0 110,297 0 0
224 1,3,5-trimethylbenzene 62,478 25,342 0 0 25,342 7,773 12,492 0 16,871
227 Toluene 1,094,542 325,030 0 0 325,030 430,365 323,563 0 15,584
231 Nickel 1,736 0 0 0 0 1,733 0 0 3
232* Nickel compounds 3,497 0 423 0 423 1,202 0 1,872 0
266 Phenol 606,734 15 18 0 33 0 606,701 0 0
272 Bis (2-ethylhexyl) phthalate 7,045 0 0 0 0 6,834 211 0 0
283 Hydrogen fluoride and its water-soluble salts 4,313 0 690 0 690 0 0 3,623 0
299* Benzene 30,529 38 0 0 38 22,015 8,476 0 0
310 Formaldehyde 226,529 2,386 0 0 2,386 0 224,143 0 0
311 Manganese and its compounds 268,281 0 312 0 312 266,234 0 1,710 25
346 Molybdenum and its compounds 4,672 0 0 0 0 2,420 0 44 2,208
Total 5,077,102 733,295 1,758 0 735,053 2,722,393 1,479,657 12,189 127,810

Miyoshi Office (including plant)

Miyoshi Office (including plant)

Miyoshi Office

Address: 551-1 Higashi-sakaya-cho, Miyoshi-shi, Hiroshima, Japan
Operations started: May, 1974
Major products: Engines
ISO14001 certification: ISO14001 certification: June 2000
Site area (floorspace): 1,667,000 square meters (64,000 square meters)


Atmospheric pollutants Unit Regulation Actual
(max.)
NOx Boilers ppm 250 190
Diesel engines ppm 950 800
Ash Boilers g/m3N 0.30 0.046
Diesel engines g/m3N 0.10 0.047

Wastewater drainage destination: Basen River

Water pollutants Unit Regulation Actual
Max. Min. Avg.
pH - 5.8-8.6 7.5 7.1 7.3
BOD mg/L 70 3.6 1.3 2.1
SS mg/L 70 4.6 1.0 4.0
Oil mg/L 5 ND ND ND
Fluorine mg/L 8 0.3 0.3 0.3
Soluble manganese mg/L 10 0.4 ND <0.2
Total nitrogen mg/L 60 1.6 1.6 1.6
Total phosphorus mg/L 8 ND ND ND
Coliform groups Colonies/cm3 3000 220 <10 <28
Boron mg/L 10 0.05 0.05 0.05
Ammonia, ammonium, nitrous acid, and nitrous acid compounds mg/L 100 0.9 0.9 0.9

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, cis 1.2-dichloroethylene, 1.1.1-trichloroethane, 1.1.2-trichloroethane, 1.3-dichloropropene, thiuram, simazine, thiobencarb, benzene, selenium, phenol, copper, zinc, soluble iron, and chromium.

(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.)

Substance No Substance group Amount handled Volume emitted Amount consumed Amount disposed Amount transferred Amount recycled
Air Water Soil Waste products
40 Ethyl benzene 5,761 0.66 0 0 0.66 0 5,760 0 0
63 Xylene 24,610 2.5 0 0 2.5 0 24,608 0 0
224 1,3,5-trimethylbenzene 1,924 0.06 0 0 0.06 0 1,924 0 0
227 Toluene 60,175 22 0 0 22 0 60,153 0 0
299* Benzene 2,257 2.8 0 0 2.8 0 2,254 0 0
Total 94,727 28 0 0 28 0 94,699 0 0
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