 Keye LukeShigeru Kawamura / Sunagawa / Toji (voice) | Shigeru Kawamura / Sunagawa / Toji (voice) |
| AAya OyamaKiyo / woman outside hospital / female honeymooner (voice) | Kiyo / woman outside hospital / female honeymooner (voice) |
 George TakeiDr. Kyuichiro Kashiwagi / Izeki / male honeymooner (voice) | Dr. Kyuichiro Kashiwagi / Izeki / male honeymooner (voice) |
 Paul FreesNishimura / Suda / Dr. Tanaka / Air Force officer / Kitahara (voice) | Nishimura / Suda / Dr. Tanaka / Air Force officer / Kitahara (voice) |
 Marvin MillerAir Self-Defense Force commander / Air Force pilot / newsreader (voice) | Air Self-Defense Force commander / Air Force pilot / newsreader (voice) |
 James YagiOsaki / Professor Minami / hotel manager / farmer (voice) | Osaki / Professor Minami / hotel manager / farmer (voice) |
| JJane ChangOtami (voice) | Otami (voice) |
| DDavid DuncanNarrator | Narrator |
 Haruo NakajimaRodan / Meganulon (uncredited) | Rodan / Meganulon (uncredited) |
 Kenji SaharaShigeru Kawamura | Shigeru Kawamura |
 Yumi ShirakawaKiyo | Kiyo |
 Akihiko HirataDr. Kyuichiro Kashiwagi | Dr. Kyuichiro Kashiwagi |
 Minosuke YamadaOsaki | Osaki |
 Yoshibumi TajimaIzeki | Izeki |
| AAkio KoboriNishimura | Nishimura |
