冶金业
ahresty corporation
nippon light metal co., ltd.
asahi kinzoku kogyo co., ltd.
nippon mining & metals co., ltd.
benkan corporation
nippon steel welding products & engineering co.
chuo spring co., ltd.
nishi nippon electric wire & cable co., ltd.
daiki aluminium industry co., ltd.
nuclear fuel industries, ltd.
dowa ironpowder co., ltd.
occ corporation
dowa mining co., ltd.
piolax, inc.
fujikura ltd.
ryobi ltd.
furukawa electric co., ltd.
sanwa shutter corporation
gifu seiki kogyo k. k.
se corporation
hitachi powdered metal
shibazakj seisakusho, ltd.
horie metal co.,ltd.
shin-etsu handotai co., ltd.
japan crown cork co., ltd.
showa aluminum corporation
japan nuclear fuel limited
showa electric wire & cable
jone crane japan, inc.
sumitomo electric industries
kanematsu metals ltd.
sumitomo light metal industries, ltd.
kdk corporation
sumjtomo metal mining co.
kikuchi co., ltd.
sumitomo sitix corporation
kobe steel, ltd.
suncall corporation
komatsu electronics metals
suzukj metal industry co., ltd.
marubeni metal corporation
tanaka kjkinzoku kougyo
meira corporation
toho titanium co., ltd.
mitsubishi cable industries, ltd.
tokusen kogyo co., ltd.
mitsubishi materials corp.
tokyo tungsten co., ltd.
mitsubishi materials silicon corporation
tostem corporation
mitsubishi shindoh co., ltd.
totoku electric co., ltd.
mitsui aluminium company, ltd.
toyama light metal industry company, ltd.
mitsui mining & smelting co.
toyo aluminium k.k.
nakashima propeller co., ltd.
toyo seikan kaisha，ltd.
nasu denkj-tekko co., ltd.
tyton company of japan, limited
nhk spring co., ltd.
yokohama hydex co.
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