Gigantis, the Fire Monster

Hiroshi Koizumi

Tsukioka

若山セツ子

Hidemi

Minoru Chiaki

Kobayashi (as Mindru Chiaki)

Takashi Shimura

Dr. Yamane

清水将夫

Dr. Tadokoro

恩田清二郎

Commander (as Serjiro Onda)

澤村宗之助

Shibeki

Yoshio Tsuchiya

Tajima

木匠マユリ

Radio Operator

Yukio Kasama

Father (as Yokio Kasama)

笈川武夫

Police Chief

山田巳之助

Chief of Civil Defense (uncredited)