Koa Seitan K.K

Koa Jukogyo K.K

Tokyo Seitan K.K. (File #297)

Koa Kikai Kabushiki Kaisha (Koa Machine Co.)

KOA UNDO DOSHI KAI

Koa Kikai Kogyo - Owada Plant

Tokai Ryuan K.K. (Former Nippon Hiryo K.K.)

Tokai Ryuan K.K. (Former Nippon Hiryo K.K.)

Itagaki K.K

コーシンゴムK.K

Tatsumi Heiwa Kogyo K.K., Tamateyama Girls School, Tamamizu Denko K.K., Takumi Noki K.K

Kobe Steel - Chofu Plant, Bizen Kogyo - Mamiifuji Kojyo, Koa Sekiyu - Marifu-shi Seiyu Sho (Koa Oil Company) Kurashiki Boseki - Tamashima Kojyo

KOA MEIKYO REMMEI (Asia Development and Anti-Communist League)

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

Yoshimura Shipbuilding Co. (Kure Zosen K.K.?) Okada-gumi K.K

Harada Shiki Shokki K.K. (Daido Kogyo K.K.) - Katano Plant

Koa Oil Company - Otake: Outline, summary and inventory of the Koa Oil Company. Report No. 51a(5)(e), USSBS Index Section 2

Nisshin Denka K.K

Chuo Kogyo K.K

Nihon Kako K.K

Sanki Kogyo K.K

Komoro Sangyo K.K

Nisshin Sangyo K.K

Amatsuji Kokyu K.K

Nakayama Taiyodo K.K