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

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

Nippon Aluminum Kogyo K.K. (Mitsubishi Light Metal Mfg. Co.) - Mikuni Plant

Kashiwara Seiki K.K., Kotobuki Forging Press Ind. - Matsuo Plant, Kawabata Sewing Machine Mfg., Kotobuki Ind. K.K

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

Daido Keikinzoku Kogyo K.K. - Sakai Plant, Mitsuwa Industry Co., Mitsumoto Kinzoku Kogyo - Domyoji Factory, Mitsubishi Kakoki K.K. (chemical Machine) - Sakai Plant

Matsushita Electric Ind. Co. - Juso Plant, Chiyoda Sangyo K.K. - Hikone Plant

Taihei Kogyo K.K. (Mitsubishi Mining Co., Ltd.) (File #274)

Mitsubishi Denki K.K. - Wakayama Kojo, Misugi Iron Works, Kano Manufactory, Matsushita Electric Ind. Co. - Juso Plant

Fuso Metal Ind. Co. - Wakayama Plant, Nippon Tanatsu Kikai Co., Amatsuji Kokyu K.K. - Oki Plant, Amatsuji Kokyu K.K. - Maruyama Plant

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

Mitsubishi Kinzoku K.K. - Honsha Plant (Matsushita Metal Co. - Head Office Plant)

Osaka Yakin Kogyo K.K

Mitsubishi Seiki Kogyo K.K. - Seta Works

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

412.31; (Inventory Sheets) Mitsubishi Denki K.K. Himeji Plant, 400.170; (Reconversion & Exemption) Showa Seiki Kogyo K.K

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)