Akira Takarada
Lt. Commander Jiro Nomura
Mie Hama
Madame Piranha
Rhodes Reason
Commander Carl Nelson
Linda Miller
Lieutenant Susan Watson
Hideyo Amamoto
Dr. Who
Yoshibumi Tajima
Henchman
Sachio Sakai
Henchman
R
Ryuji Kita
SDF General
Ikio Sawamura
Native
Nadao Kirino
Henchman
Shōichi Hirose
Henchman
Kazuo Suzuki
Henchman
Tōru Ibuki
Henchman
Naoya Kusakawa
Susumu Kurobe
Henchman
Haruo Nakajima
King Kong
H
Hiroshi Sekita
Mechani-Kong/Gorosaurus
Kei Taguchi
(voice)
Akiko Santo
(voice)
Osman Yusuf
Submariner (uncredited)
Tadashi Okabe
Soldier (uncredited)
S
Seishirō Kuno
Soldier (uncredited)
Yasuhisa Tsutsumi
General (uncredited)
A
Andrew Hughes
Reporter (uncredited)