Yōsuke Natsuki

Detective Shindo

Yuriko Hoshi

Naoko Shindo

Akiko Wakabayashi

Mas Selina Salno

Hiroshi Koizumi

Professor Miura

Takashi Shimura

Dr. Tsukamoto

Yumi Ito

Shobijin

Emi Ito

Shobijin

Akihiko Hirata

Chief Detective Okita

Minoru Takada

Prime Minister (uncredited)

Ikio Sawamura

Honest Fisherman (uncredited)

Kōzō Nomura

Geologist (uncredited)

Kenji Sahara

Editor in Chief Kanamaki

Susumu Kurobe

Assassin with Mustache (uncredited)

Tôru Ibuki

Short-Tie Assassin (uncredited)

Kazuo Suzuki

Door-Opener Assassin (uncredited)

Haruya Katō

Journalist (uncredited)

Shin Ōtomo

Boss of Assassins (uncredited)

Senkichi Ōmura

Would-Be Hat Retriever (uncredited)

Yutaka Nakayama

Tourist with Lost Hat (uncredited)

Heihachirō Ōkawa

Astronomer (uncredited)