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

Mitsubishi Jukogyo K.K. - Mikuni Plant

Hirose Iron Works, Hirano Bearing Mfg. Co., Minato Electric Co., Daido Kogyo Co. - Mikuni Plant

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

Nippon Aluminum Kogyo K.K. (File #200)

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

Asia Tetsu-gyo K.K., Koyo Mfg. Co. - Hanaten Plant, Koyo Kogyo Co., Araya Industrial Co. - Steel Foundry

Nippon Kagaku Kogyo K.K., 2nd Plant

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

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

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

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

Nippon Keigin Kogyo K.K., Koha Machine Tool K.K., Japan Paper Control Co., Teikoku Chukosho - Himejima Plant

List of Authorized Use - Oi Plant, Nippon Kogaku Kogyo K.K. (Japan Optical Industry Co., Ltd.)

400.170 (Reconversion & Exemption) Osaka Kagaku Kogyo K.K. - Inagawa Plant, Taiyo Cement-earth Mfg. Co. (Related to Nihon Seitetsu)

Nippon Kogaku Kogyo K.K

Nippon Suiso Kogyo K.K

Nippon Kogaku Kogyo K.K

Mishima Mokuzai K.K., Daito Yoko, Nippon Jimuyohin Seizo K.K., Hayakawa Denki Kogyo K.K. - Tanabe Plant

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

Fushimi Factory (Osaka Military Arsenal), Dai Nippon Yoshi K.K., Dai Nippon Kogyo K.K., Dai Nippon Kikai Kogyo K.K

Toko Precision Machinery Mfg. Co. - Oyodo, Senrioka, Mikuni Factories

Mitsubishi Seiki Kogyo K.K. - Seta Works

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