ISO Certificate Download
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, Amagasaki Area (ISO9001)
Kansai Works Wakayama Area (Wakayama / Kainan / Sakai)(ISO14001)
Kansai Works Amagasaki Area (ISO14001)
Kyushu Works Oita Area (Oita / Hikari Pipe Kyushu Works Oita Area & Tube Div.)