Head Office
Hokkaido Branch
Tohoku Branch
Kanto Branch
Tokai Branch
Kansai Branch
Kyushu Branch
Denka Company Limited (Denka)
NIPPON SODA CO. LTD(NISSO)
Sankyo Tateyama, Inc. SankyoAlumi
KIYOKAWA plating industry Co., LTD
Tanaka Chemical Corporation
NIPPON DENKO CO., LTD
UNIZONE
OTANI STEEL CORPOLATION