Tadao Takashima
Tasumo Hatanaka
Yôko Fujiyama
Makoto Jinguji
Yû Fujiki
Yoshito Nishibe
Kenji Sahara
Uto Omino
Ken Uehara
Admiral Kosumi
Hiroshi Koizumi
Inspector
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 Ito
Shindo
Ikio Sawamura
Taxi Driver
Tetsuko Kobayashi
Empress of Mu
Akemi Kita
Rimako - Sneezing Model
Hiroshi Hasegawa
Liuetenant Fuji
Nadao Kirino
Kidnapped Scientist
Shin Ōtomo
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 of Bus
Yukihiko Gondô
Military Henchman
Shōichi Hirose
Mu Henchman
Katsumi Tezuka
Mu Henchman
Takuzō Kumagai
(as Jirô Kumagai)
Yasuzō Ogawa
Mu Henchman Beside High Priest of Mu
Shirō Tsuchiya
Senior Officer
Wataru Ōmae
Police Officer
Osman Yusuf
Mu Submarine Crewman
Hal Archer
Detective Ito (voice)
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 officersI
Keiji Sakakida
Mt. Mihara Climber
Enver Altenbay
Minor Role (uncredited)
Ralph Jesser
One of Mu Imperials (uncredited)
Haruo Nakajima
Mu Empire man / Self Defense Forces exec
Ted Thomas
Jinguji / High Priest (voice) (uncredited)