Handa Jukogyo Co. - Osaka Plant

Handa Jukogyo - Osaka Plant Teikoku Kako Company - Osaka Factory

Matsushita Electric Ind. Co. - Koriyama Plant, Hirose Jukogyo K.K. - Wakae Plant, Minami Orimono Co., Matsushita Shipbuilding Co. - Sakai Plant

Nippon Typewriter Co. - Mikuni Plant (Nakajima Kikai Osaka Plant)

Minato Electric Machine Ind. Co., Osaka Heavy Ind. Co. - Kanzakigawa Plant, Osaka Sanso Kogyo Co., Saeki Kikai Kogyosho

Osaka Forging Co., Kokoku Ind. Co., Mitsubishi Mokushitsu Kogyo K.K. - Chishimacho Plant

Howa Jukogyo K.K., Tokyo Plant

Mitsubishi Jukogyo K.K. - Plant Accountability

Mitsubishi Jukogyo K.K. - Mikuni Plant

Mitsubishi Jukogyo - Daijuyon Kojo (Uzumasa Plant)

Osaka Shipbuilding Co

Osaka Yogu Co

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

Teikoku Kako - Osaka Plant

Matsushita Electric Ind. Co. - Tsuda Plant, Matsushita Electric Ind. Co. - Kyoto Plant, Futaba Machine Tool Co. (Minoura Machine Tool Co.)

Haruna Industrial Co., First Plant

Haruna Industrial Co., Third Plant

Taihei Kogyo Co. - Shinodayama Plant

Kawanishi Aircraft Co. - Takarazuka Plant

Nikko Industrial Co., Tachikawa Plant

Nikko Industrial Co., Omori Plant

Teikoku Tanko Co. - Tsumori Plant

Riken Industrial Co., Odai Plant

Kayaba Sangyo Co., Tokyo Plant

Kanegafuchi Spinning Co. - Torigai Plant