Hiroshi Koizumi
Shoichi Tsukioka
Keye Luke
Shoichi Tsukioka (voice)
Setsuko Wakayama
Hidemi Yamaji
Aya Oyama
Hidemi Yamaji (voice)
Minoru Chiaki
Kôji Kobayashi
Marvin Miller
Koji Kobayashi / Narrator (voices)
Masao Shimizu
Dr. Tadokoro
Mayuri Mokushô
Yasuko Inouye, Koji's girl
Takeo Oikawa
Osaka Chief of Police
Minosuke Yamada
Chief of Civil Defense
Takashi Shimura
Doctor Yamane
Sonosuke Sawamura
Foreman Shibeki
Yoshio Tsuchiya
Member of Osaka's SDF Tajima
Yukio Kasama
President of Fishery Koehi Yamaji
Paul Frees
Doctor Kyohei Yamane, Commander of Osaka's SDF Terasawa, President of Fishery Koehi Yamaji (voices)
Ren Yamamoto
Commander of Landing Craft Ikeda
George Takei
Commander of Landing Craft Ikeda (voice)
Seijirô Onda
Commander of Osaka's SDF Terasawa
Shin Ōtomo
Convict Leader
Senkichi Ōmura
Convict
Haruo Nakajima
Gigantis
Katsumi Tezuka
Angurus
Shōichi Hirose
Convict