List of Authorized Use - Nippon Kentetsu Kogyo Co., Ltd. Nakagawa Plant

List of Authorized Use - Nippon Kentetsu Kogyo Co., Ltd. Tokyo Works

List of Authorized Use - Nippon Soda Co., Ltd. Sunamachi Plant

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

List of Authorized Use - Dai-Nippon Kikai Kogyo Aoto Plant

List of Authorized Use - Nisshin Industry Co., Ltd. Itabashi Plant (Kakuwa Kokuki Kogyo K.K.)

List of Authorized Use - Fuji Industrial Co., Ltd. Mitaka Plant

List of Authorized Use - Nikko industrial Co., Ltd. Tachikawa Plant

List of Authorized Use - Fuji Industrial Co., Ltd. Ogikubo Plant

List of Authorized Use - Kayaba Sangyo Co., Ltd. Tokyo Plant

List of Authorized Use - Kanegafuchi Spinning Co., Ltd. Tokyo Plant

List of Authorized Use - Mizuho Industrial Co., Ltd. Tanashi Plant

List of Authorized Use - Japan Special Steel Co., Ltd. Omori Plant

List of Authorized Use - Showa Aircraft Industry Co., Ltd. Ogami Plant

List of Authorized Use - Showa Aircraft Industry Co., Ltd. Tokyo Plant

List of Authorized Use - Pilot Seiki Co., Ltd

List of Authorized Use - Chuo Kogyo K.K. Omori Plant

List of Authorized Use - Chuo Kogyo K.K. Oji Plant

List of Authorized Use - Nikko Kogyo K.K. Omori Plant

List of Authorized Use - Mitsui Kogyo Kaisha, Tokyo Plant

List of Authorized Use - Chuo Kogyo Kabushiki Kaisha Kokubunji Plant

List of Authorized Use - Tokyo Juki Kogyo K.K., Tokyo Plant

List of Authorized Use - Kanegafuchi Spinning Co., Ltd. Nerima Works

List of Authorized Use - Tamagawa Works, Shonan Seisakusho Co., Ltd

List of Authorized Use - Shinko Kikai Kogyo K.K