- Kôjirô Hongô
- Keisuke Hirata
- Kyôko Enami
- Karen
- Yûzô Hayakawa
- Kawajiri
- Takuya Fujioka
- Dr. Sato
- Kôji Fujiyama
- Onodera
- Shô Natsuki
- Ichiro Hirata
- Yoshirô Kitahara
- Professor Amano
- Ichirô Sugai
- Dr. Matsushita
- Bontarô Miake
- Self-Defense Force General
- Jutarô Kitashiro
- Self-Defense Force Commander
- Kazuko Wakamatsu
- Sadae Hirata
- Yuka Konno
- Onodera's Lover
- Eiichi Takamura
- Governor of Osaka
- Ken'ichi Tani
- Lee
- Kôichi Itô
- Metropolitan Police Superintendent-General
- Hikaru Hoshi
- Awaji Maru Captain
- Osamu Abe
- Awaji Maru Crewman
- Yoshihiro Hamaguchi
- Awaji Maru Crewman
- Joe Ohara
- Karen's Father
- Tsutomu Nakata
- Hayashi
- Yûji Moriya
- News Announcer
- Gai Harada
- Kishimoto
- Kazuo Mori
- Awaji Maru Crewman
- Yasuo Araki
- Awaji Maru Crewman
- Shin Minatsu
- Awaji Maru Crewman
- Takehiko Gotô
- (as Takehiko Goto)
- Toichiro Kagawa
- Man at Observatory
- Kenichiro Yamane
- Man at Observatory
- Takashi Masuda
- Butodan
- Genzô Wakayama
- Narrator
- Abdo Apanai
- Witness in airport crowd
- Yukie Kagawa
- Girl in Village - Karen's Friend
- Anthony La Penna
- Narrator
- Teruo Aragaki
- Gamera
- Jacques Enghien
- Witness in Airport crowd
- Michael Kaye
- Keisuke Hirata
- Warren Rooke
- Ichiro Hirata
- Ted Thomas
- Kawajiri / Police Commissioner / Sailor / Mr. Lee / Radio Announcer (voice) (uncredited)
