Nippon Tanatsu Kogyo - Plant #5

Nippon Tanatsu Kogyo Plant #5

Nippon Kogaku Kogyo, Oi Plant

Nippon Kagaku Kogyo K.K., 2nd Plant

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

Nippon Kogyo Shimbun

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

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

Nippon Kogyo (File #177)

Nippon Kogaku Kogyo K.K

Nippon Suiso Kogyo K.K

Nippon Kogaku Kogyo K.K

Nippon Kogaku Kogyo, Matsumoto

Nippon Kentetsu Kogyo, Tokyo

Nippon Kentetsu Kogyo, Funabashi

Yamatake Kogyo, Omori Plant

Amatsuji Kogyo - Sennan Plant

Nippon Carbide Kogyo (File #201)

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

Taihei Kogyo Co. - Shinodayama Plant

Otani Kogyo K.K. - Amagasaki Plant