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North Nippon Works Muroran Works
North Nippon Works Kamaishi Area
East Nippon Works Kashima Area
East Nippon Works Kimitsu Area
East Nippon Works Naoetsu Area
Kansai Works Wakayama Area (Wakayama / Kainan / Sakai)
Kyushu Works Yawata Area (Hikari Titanium Production Div.)
Kyushu Works Oita Area (Oita / Hikari Pipe Kyushu Works Oita Area & Tube Div.)