Toyo Soda Kogyo K.K. - Soda Ash Plant, Tonda Plant

Tokyo Soda Kogyo K.K. - Caustic Soda Plant Toda Plant

Toyo Valve Kogyo K.K

Nihon Soda K.K., Sunamachi Plant

Shinsei Kogyo K.K. - Taniyama Plant

Chuo Kogyo K.K., Omori Plant

Chuo Kogyo K.K., Rokugo Plant

Chuo Kogyo K.K., Oji Plant

Chuo Kogyo K.K., Kokubunji Plant

Otani Kogyo K.K. - Amagasaki Plant

Gunze Kogyo K.K. - Yoka Plant

Riken Kogyo K.K. - Amagasaki Plant

Nikkoku Kogyo K.K. (Okubo Plant)

Genkai Kogyo K.K. Plant Accountability

Kotobuki Kogyo K.K. - Kujo Plant

Kotobuki Kogyo K.K. - Jujo Plant

Kawasaki Jukogyo K.K. - Nishinomiya Plant, Kawasaki Kokuki Kogyo K.K. - Akashi Plant

Toa Kinzoku Kogyo K.K. - Haruki Plant

Kokko Seisa Kogyo K.K. - Head Plant

Asahi Denka Kogyo K.K., Ogu Plant

Kawasaki Kokuki Kogyo K.K. - Futami Plant

Nippon Kagaku Kogyo K.K., 2nd Plant

Kawasaki Kokuki Kogyo K.K. - Hokuban Plant

Mitsui Seiki Kogyo K.K., Tokyo Plant

Tachiarai Kogyo K.K., Amagi - Plant Accountability