Dr. Paul Stewart
Russ Tamblyn
Akemi
Kumi Mizuno
Soldier
Nadao Kirino
Shōichi Hirose
Defiant Reporter
Tadashi Okabe
Skeptical Reporter
Hideo Shibuya
Fisherman #1
Ikio Sawamura
Fisherman #2
Seishirō Kuno
Official
Someshō Matsumoto
Dr. Paul Stewart (voice)
Gorō Mutsumi
Gaira
Haruo Nakajima
Sanda
Yû Sekita
Dr. Yuzo Majida
Kenji Sahara
(uncredited)
Yū Fujiki
Dr. Kita
Nobuo Nakamura
General
Jun Tazaki
Police Chief
Hisaya Ito
Police Officer
Yoshifumi Tajima
Sailor
Ren Yamamoto
Singer
Kipp Hamilton
General's Aide
Kōzō Nomura
Special Effects Assistant
Teruyoshi Nakano
Special Effects
Yasuyuki Inoue
Producer
Tomoyuki Tanaka
Original Music Composer
Akira Ifukube
Writer
Takeshi Kimura
First Assistant Director
Koji Kajita
Director
Ishirō Honda
Henry G. Saperstein
Special Effects Manager
Eiji Tsuburaya
Visual Effects
Executive Producer
Kenichiro Tsunoda
Production Design
Takeo Kita
Story
Reuben Bercovitch
Editor
Ryôhei Fujii
Art Designer
Tôru Narita
Fumio Nakadai
Production Manager
Shoichi Koga
Production Supervisor
Richard Krown
Yasuaki Sakamoto
Sound Effects Editor
Sadamasa Nishimoto
Cinematography
Hajime Koizumi
Sound Recordist
Norio Tone