Casts
Keye Luke
as Shigeru Kawamura / Sunagawa / Toji (voice)
George Takei
as Dr. Kyuichiro Kashiwagi / Izeki / male honeymooner (voice)
Paul Frees
as Nishimura / Suda / Dr. Tanaka / Air Force officer / Kitahara (voice)
Marvin Miller
as Air Self-Defense Force commander / Air Force pilot / newsreader (voice)
James Yagi
as Osaki / Professor Minami / hotel manager / farmer (voice)
Haruo Nakajima
as Rodan / Meganulon (uncredited)
Kenji Sahara
as Shigeru Kawamura
Yumi Shirakawa
as Kiyo
Akihiko Hirata
as Dr. Kyuichiro Kashiwagi
Minosuke Yamada
as Osaki