 Showtaro MorikuboYu Ominae (voice) | Yu Ominae (voice) |
 Ken ShiroyamaDr. Meisel (voice) | Dr. Meisel (voice) |
 Takehito KoyasuJean Jacquemonde (voice) | Jean Jacquemonde (voice) |
 Katsumi SuzukiLittle Boy (voice) | Little Boy (voice) |
 Sakiko TamagawaMargaret (voice) | Margaret (voice) |
 Kinryu ArimotoYamamoto (voice) | Yamamoto (voice) |
| RRyuji AigaseColonel McDougal (voice) | Colonel McDougal (voice) |
 Kenji TakanoFat Man (voice) | Fat Man (voice) |
| HHiroshi MatsumotoManager (voice) | Manager (voice) |
| IIkumi KimuraStewardess (voice) | Stewardess (voice) |
| KKenichi SakaguchiN.C.O (voice) | N.C.O (voice) |
 Masaaki YajimaNarrator (voice) | Narrator (voice) |
 Masaki AizawaExcavation Research Agent (voice) | Excavation Research Agent (voice) |
| MMasashi MutaCOSMOS Yu (voice) | COSMOS Yu (voice) |
 Takashi YoshidaAnnouncer (voice) | Announcer (voice) |
 Naoki MakishimaTanaka (voice) | Tanaka (voice) |
| YYoshito IshinamiGeneral (voice) | General (voice) |
 ChoAide-de-camp (voice) | Aide-de-camp (voice) |
| HHiroyuki OshitaGuard B (voice) | Guard B (voice) |
 Katsuhisa HoukiTurkish Agent A (voice) | Turkish Agent A (voice) |
| SShin GotoTurkish Agent B (voice) | Turkish Agent B (voice) |
| YYuu YamazakiClassmate A (voice) | Classmate A (voice) |
 Takayasu UsuiClassmate B (voice) | Classmate B (voice) |
| AAya Sugawara(voice) | (voice) |
| CChiho Ohkawa(voice) | (voice) |
| HHizuru Kurita(voice) | (voice) |
| SShizuka Aoki(voice) | (voice) |
| UUmi Tenjin(voice) | (voice) |
 Masayuki NakataGuard A (voice) | Guard A (voice) |
