Casts
Hiroshi Koizumi
as Shoichi Tsukioka
Keye Luke
as Shoichi Tsukioka (voice)
Setsuko Wakayama
as Hidemi Yamaji
Minoru Chiaki
as Kôji Kobayashi
Marvin Miller
as Koji Kobayashi / Narrator (voices)
Masao Shimizu
as Dr. Tadokoro
Mayuri Mokushô
as Yasuko Inouye, Koji's girl
Minosuke Yamada
as Chief of Civil Defense
Takashi Shimura
as Doctor Yamane
Sonosuke Sawamura
as Foreman Shibeki
