Kenji Sahara
Dr. Yuzo Mamiya
Acting
Kumi Mizuno
Akemi Togawa
Acting
Russ Tamblyn
Dr. Paul Stewart
Acting
Jun Tazaki
General Hashimoto
Acting
Kipp Hamilton
Singer
Acting
Yoshibumi Tajima
Officer Hirai
Acting
Nobuo Nakamura
Professor Kita
Acting
Hisaya Itō
Chief Izumida
Acting
Nadao Kirino
Lt. Col. Kazama
Acting
Ren Yamamoto
Saburo Kameda
Acting
Kōzō Nomura
General's Aide
Acting
Shōichi Hirose
Soldier
Acting
Tadashi Okabe
Defiant Reporter
Acting
Hideo Shibuya
Skeptical Reporter
Acting
Ikio Sawamura
Fisherman #1
Acting
Seishirō Kuno
Fisherman #2
Acting
Someshō Matsumoto
Official
Acting
Gorō Mutsumi
Dr. Paul Stewart (voice)
Acting
Haruo Nakajima
Gaira
Acting
Hiroshi Sekita
Sanda
Acting
Yasuhiro Komiya
Adolescent Sanda
Acting
Kasei Kinoshita
Adolescent Sanda (voice)
Acting
Yū Fujiki
(uncredited)
Acting