All Cast
Akira Takarada
Lt. Commander Jiro Nomura
Mie Hama
Madame Piranha
Rhodes Reason
Commander Carl Nelson
Linda Miller
Lieutenant Susan Watson
Hideyo Amamoto
Dr. Who
Yoshifumi Tajima
Henchman
Sachio Sakai
Henchman
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
Hiroshi Sekita
Mechani-Kong/Gorosaurus
Kei Taguchi
(voice)
Akiko Santo
(voice)
Osman Yusuf
Submariner (uncredited)
Tadashi Okabe
Soldier (uncredited)
Seishirō Kuno
Soldier (uncredited)
Yasuhisa Tsutsumi
General (uncredited)