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Keye Luke as Shigeru Kawamura / Sunagawa / Toji (voice) |
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Aya Oyama as Kiyo / woman outside hospital / female honeymooner (voice) |
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George Takei as Dr. Kyuichiro Kashiwagi / Izeki / male honeymooner (voice) |
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Paul Frees as Nishimura / Suda / Dr. Tanaka / Air Force officer / Kitahara (voice) |
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Marvin Miller as Air Self-Defense Force commander / Air Force pilot / newsreader (voice) |
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James Yagi as Osaki / Professor Minami / hotel manager / farmer (voice) |
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Jane Chang as Otami (voice) |
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David Duncan as Narrator |
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Haruo Nakajima as Rodan / Meganulon (uncredited) |
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佐原健二 as Shigeru Kawamura |
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白川由美 as Kiyo |
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平田昭彦 as Dr. Kyuichiro Kashiwagi |
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山田巳之助 as Osaki |
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田島 義文 as Izeki |
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小堀阿吉雄 as Nishimura |
| Directing | Ishirō Honda | Director |
| Camera | Isamu Ashida | Director of Photography |
| Crew | Eiji Tsuburaya | Special Effects |
| Directing | Jun Fukuda | First Assistant Director |
| Writing | 黒沼健 | Story |
| Visual Effects | Eiji Tsuburaya | Visual Effects Director |
| Production | Frank King | Producer |
| Production | Herman King | Producer |
| Production | Maurice King | Producer |
| Crew | Haruo Nakajima | Stunts |
| Writing | David Duncan | Writer |
| Editing | Robert S. Eisen | Supervising Film Editor |
| Production | Tomoyuki Tanaka | Associate Producer |
| Sound | Paul Sawtell | Music |
| Sound | Bert Shefter | Music |
| Sound | Herschel Burke Gilbert | Music |
| Sound | Akira Ifukube | Original Music Composer |
