Eiji Funakoshi
Dr. Hidaka
Junichiro Yamashita
Aoyagi
Michiko Sugata
Nobuyo Sakurai
Harumi Kiritachi
Kyoko Yamamoto
Yoshirō Kitahara
Mr. Sakurai
Bokuzen Hidari
Old Farmer
Jun Hamamura
Professor Murase
Jutarō Hōjō
Self-Defense Force Commander
Yoshio Yoshida
Eskimo Chief
Kenji Oyama
Minister of Defense
Jun Osanai
Maru Captain
Kōji Fujiyama
US Arctic Base Commander
Ichigen Ohashi
Mr. Ueda
Munehiko Takada
Soviet Representative
Kenichi Tani
Officer
Tsutomu Nakata
Toshio's Uncle
Yūji Moriya
News Announcer
Osamu Maruyama
Atomic Energy Research Institute Chief
Yoshirō Uchida
Toshio Sakurai
Toshio Maki
Atomic Energy Research Institute Staff A
Kazuo Sumida
Atomic Energy Research Institute Staff B
Rin Sugimori
Police Station Chief
Fumiko Murata
Old Farmer's Wife
Tetsurō Takeuchi
Atomic Energy Research Institute Staff C
Kanju Yagi
Gamera (uncredited)