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

Nippon Kagaku Kogyo K.K., 2nd Plant

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

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

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

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

412.31: Teikoku Seimitsu Kogyo K.K. (Nomura Plant) - Inventory Sheets

Teikoku Nenryo Kogyo K.K

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

Nippon Kogaku Kogyo K.K

Nippon Suiso Kogyo K.K

Nippon Kogaku Kogyo K.K

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

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

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)