Robert Dunham as Mark Jackson

Yōsuke Natsuki as Inspector Komei

Yōko Fujiyama as Masayo

Hiroshi Koizumi as Kirino

Susumu Fujita as General Iwasa

Jun Tazaki as Chief Inspector

Nobuo Nakamura as Doctor Matakata

Seizaburō Kawazu as Gangster Boss

Akiko Wakabayashi as Gang Moll

Hideyo Amamoto as Maki the Safecracker

Haruya Katō as Sabu, small henchman

Yoshibumi Tajima as Gangster

Nadao Kirino as Gangster

Akira Wakamatsu as Gangster

Yutaka Nakayama as Floating Drunk/Coal truck assistant

Jun Funato as Inspector Nitta

Takuzō Kumagai as Defense Corps Executive

Hideo Shibuya as Nosy Reporter

Yasuhisa Tsutsumi as Ginza police officer

Shōichi Hirose as Thermal power plant staff

Ichirō Chiba as Diamond Truck Passenger

Wataru Ōmae as Satellite Station Scientist

Tadashi Okabe as Police Officer

Keiko Sawai as Laboratory Scientist

Yutaka Oka as Transport company chief

Chōtarō Tōgin as Coal truck driver

Mitsuo Tsuda as Defense Corps Executive

Kōji Iwamoto as Dr. Munakata's assistant

Haruya Sakamoto as Diamond transporter

Tadashi Okabe as Ginza Police Officer

Haruo Nakajima as Coal plant witness