- Tadao Takashima
- Commercial Photographer Susumu Hatanaka
- Yôko Fujiyama
- Makoto Jinguji, the Captain's Daughter
- Yû Fujiki
- Yoshito Nishibe
- Kenji Sahara
- Uoto Unno - Journalist / Mu Agent
- Ken Uehara
- Retired Admiral Kusumi
- Hiroshi Koizumi
- Detective Itô
- Jun Tazaki
- Captain Hachiro Jinguji
- Yoshifumi Tajima
- Tome 'Amano' Amanoshome
- Akihiko Hirata
- Mu Agent #23
- Hideyo Amamoto
- High Priest of Mu
- Susumu Fujita
- Defense Commander
- Minoru Takada
- Government Official
- Hisaya Itô
- Shindo, Kidnapped Scientist
- Ikio Sawamura
- Taxi Driver
- Tetsuko Kobayashi
- Empress of Mu
- Akemi Kita
- Rimako - Sneezing Model
- Hiroshi Hasegawa
- Liuetenant Fuji
- Nadao Kirino
- Kidnapped Scientist
- Shin Ãtomo
- Government Official
- Haruya Sakamoto
- Sergeant Yamada
- Tetsu Nakamura
- Warship Captain
- Yutaka Nakayama
- Sailor
- Mitsuo Tsuda
- Defense Agency Executive B
- Kôji Uno
- Police Officer
- Sadako Amemiya
- Memoko - Girl in Susumu's Studio
- Yutaka Oka
- Man on Bus
- Yukihiko Gondô
- Military Official
- Shôichi Hirose
- Mu Henchman
- Katsumi Tezuka
- Mu Henchman
- Takuzô Kumagai
- (as Jirô Kumagai)
- Yasuzô Ogawa
- Mu Henchman Beside High Priest of Mu
- Shirô Tsuchiya
- Senior Officer
- Wataru Ãmae
- Police Officer
- Hiroshi Akitsu
- Ship's Man of Goten Kenbutai
- Shinjirô Hirota
- Traveler of Mt. Mihara / Mu Imperial in face paint
- Hal Archer
- Detective Ito
- Sanjay Mamohan Berry
- One of Mu Imperials
- Bin Furuya
- JSDF member
- Kazuo Hinata
- Defense Agency Executive
- Eisaburo Komatsu
- Sergeant Goten Kenbutai
- Akio Kusama
- Todoroki Takashi , Ken Taketai officers
- Keiji Sakakida
- Mt. Mihara Climber
- Masaaki Tachibana
- Goten Kenbutai Sergeant / Mu Empire Citizen
- Enver Altenbay
- Minor Role
- Ralph Jesser
- One of Mu Imperials
- Haruo Nakajima
- Mu Empire man who appears from the sea / Self Defense Forces executive (uncredited)
- Ted Thomas
- Jinguji / High Priest (voice) (uncredited)
- Osman Yusuf
- Muan Submarine Crewman
