Kōzō Nomura

Kenji Uozaki

Ayumi Sonoda

Yuriko Shinjô

Koreya Senda

Dr. Sugimoto

Akihiko Hirata

Dr. Fujimora, bomb expert

Fuyuki Murakami

Dr. Majima, Sugimoto's aide

Yoshio Tsuchiya

Military Officer Katsumoto

Minosuke Yamada

Secretary of Defense

Hisaya Ito

Ichiro, Yuriko's brother

Yoshifumi Tajima

Captain of Uranami

Nadao Kirino

Yutaka Wada

Akio Kusama

Military Officer Kusama

Takuzō Kumagai

(as Jirô Kumagai)

Shōichi Hirose

Fisherman

Hideo Shibuya

Cameraman

Toshitsugu Suzuki

Fisherman (as Kôji Suzuki)

Michiko Kawa

Rinsaku Ogata

Keiichirō Katsumoto

Katsumi Tezuka

Varan

Haruo Nakajima

Varan