Akira Takarada as Yoshimura

Kumi Mizuno as Dayo

Akihiko Hirata as Red Bamboo Captain Ryui

Jun Tazaki as Red Bamboo Base Commander

Hideo Sunazuka as Nita

Chōtarō Tōgin as Ichino

Tōru Ibuki as Yata Kane

Toru Watanabe as Ryota Kane

Hideyo Amamoto as Red Bamboo Naval Officer

Ikio Sawamura as Elderly Slave

Hisaya Itō as Red Bamboo Scientist

Shigeki Ishida as Newspaper Editor

Shōichi Hirose as Fleeing Infant Islander

Kazuo Suzuki as Fleeing Infant Islander

Yutaka Sada as Farmer

Noriko Honma as Itako

Chieko Nakakita as Mrs. Kane

Seiji Ikeda as President of Fisheries Association

Tadashi Okabe as Red Bamboo Scientist

Wataru Ōmae as Newspaper Reporter

Ken'ichirō Maruyama as Newspaper Reporter

Rinsaku Ogata as Red Bamboo Guard

Yoshio Katsube as Red Bamboo Soldier / Infant Islander

Hideo Shibuya as Red Bamboo Officer

Haruo Nakajima as Godzilla / Infant Islander

Hiroshi Sekita as Ebirah

Yuko Okada as Shobijin (as Pair Bambi)

Yoko Okada as Shobijin (as Pair Bambi)