Synopsis

Gaira, a humanoid sea beast spawned from the discarded cells of Frankenstein's monster, attacks the shores of Tokyo. While the Japanese military prepares to take action, Gaira's Gargantua brother, Sanda, descends from the mountains to defend his kin. A battle between good and evil ensues, leaving brothers divided and a city in ruins.

Cast

Kenji Sahara

Dr. Yuzo Mamiya

Kumi Mizuno

Akemi Togawa

Russ Tamblyn

Dr. Paul Stewart

Jun Tazaki

General Hashimoto

Kipp Hamilton

Singer

Yoshibumi Tajima

Officer Hirai

Nobuo Nakamura

Professor Kita

Hisaya Ito

Chief Izumida

Nadao Kirino

Lt. Col. Kazama

Ren Yamamoto

Saburo Kameda

Kōzō Nomura

General's Aide

Shōichi Hirose

Soldier

Tadashi Okabe

Defiant Reporter

Hideo Shibuya

Skeptical Reporter

Ikio Sawamura

Fisherman #1

No photo

Seishirō Kuno

Fisherman #2

No photo

Someshō Matsumoto

Official

Gorō Mutsumi

Dr. Paul Stewart (voice)

Haruo Nakajima

Gaira

No photo

Hiroshi Sekita

Sanda

No photo

Yasuhiro Komiya

Adolescent Sanda

No photo

Kasei Kinoshita

Adolescent Sanda (voice)

Yū Fujiki

(uncredited)

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