Nitto Seiko K.K. - Daini Kojo

Nitto Boseki K.K

Koyo Seiko K.K

Higuchi Seiki Kogyo K.K., Asahi Kiko Co., Asahi Kinzoku Kogyo - Osaka Kojo, Asahi Seiko K.K. - Sakai Plant

Daiwa Boseki K.K. - Izumo Kojo, Gunze Seishi K.K. - Imaichi Kojo, Hitachi Seisakusho - Yasuki Kojo, Matsue Nainenki Kogyo K.K

Kayaba Sangyo K.K., Omori Kojo

Nippon Hassoden K.K. - Onoda Kojo

Asahina Tekko K.K. - Okoshi Kojo

Matsushita Hikoki K.K. - Sekime Kojo

Nippon Seikosho K.K. - Hiroshima Kojo

Mitsubishi Jukogyo K.K. - Tsuruhara Kojo

Koyo Seiko K.K. - Nakagawa Plant

Asahi Seiko K.K. - Nagano Plant

Osaka Seiko K.K. - Amagasaki Plant

Yamamoto Seiko K.K. - Osaka Plant

Nishibayashi Seiko K.K. - Honsha Plant

Asahi Seiko K.K. - Semboku Plant

Koyo Seiko K.K., Tokyo Plant

Nihon Seiko K.K., Sakuramachi Plant

Nippon Hassoden K.K. - Ube Nishi Kojo

Kamitsu Kokuki K.K. Higashi & Nishi Kojo

Toa Kikai Kogyo K.K. - Amagasaki Kojo

Ishikawajima Shibaura Turbine K.K., Matsumoto Kojo

Chukyo Kikai Seisakusho K.K. - Komari Kojo

123 Daido Seiko K.K. Osaka Plant