Russ Tamblyn
Dr. Paul Stewart
Acting
Kumi Mizuno
Akemi
Acting
Kenji Sahara
Dr. Yuzo Majida
Acting
Nobuo Nakamura
Dr. Kita
Acting
Jun Tazaki
General
Acting
Hisaya Ito
Police Chief
Acting
Yoshifumi Tajima
Police Officer
Acting
Ren Yamamoto
Sailor
Acting
Kipp Hamilton
Singer
Acting
Kōzō Nomura
General's Aide
Acting
Nadao Kirino
Soldier
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
Yû Sekita
Sanda
Acting
Yū Fujiki
(uncredited)
Acting