K-20: The Fiend with Twenty Faces

Takeshi Kaneshiro

Heikichi Endo

Takako Matsu

Yoko Hashiba

Toru Nakamura

Kogoro Akechi

Kanata Hongo

Yoshio Kobayashi

Jun Kunimura

Genji

Yuki Imai

Shinsuke

Fumiyo Kohinata

Ringmaster

Takeshi Kaga

Mysterious Gentleman

Kyūsaku Shimada

Designer

Kazuyoshi Kushida

Doctor Yagi

Jun Kaname

Doctor Yagi's assistant

Yutaka Matsushige

Prisoner

Reiko Takashima

Kikuko

Toru Masuoka

Inspector Namikoshi

Hideji Ōtaki

Company president Hashiba

Hana Kino

Yoko Hashiba's maid

Kisuke Iida

Detective

Ritsuko Okusa