Hiroshi Koizumi
as Shoichi Tsukioka
Takashi Shimura
as Kyohei Yamane-hakase
Minoru Chiaki
as Kôji Kobayashi
Yoshio Tsuchiya
as Tajima
Setsuko Wakayama
as Hidemi Yamaji
Seijiro Onda
as Captain Terasawa of Osaka Defense Corps
Sonosuke Sawamura
as Hokkaido Branch Manager Shingo Shibeki
Masao Shimizu
as Zoologist Dr. Tadokoro