"Seventh film in the Boy Detectives Club series."
Susumu Namishima
as Kogoro Akechi
Hitomi Nakahara
as Mariko
Yūnosuke Itō
as The Fiend with Twenty Faces
Hiroshi Yamate
as Kobayashi
Yasushi Obata
as Shimada
Mitsue Komiya
as Mitsue
Sanae Mitsuoka
as Akiko Shimada
Akiko Kazami
as Lady Shimada
Takashi Kanda
as
Jiro Takagi
as Kuroda
Tokuro Konishi
Jun Usami
as Keiichiro Shimada
Tsuneo Kobayashi
Director
Shizuka Fujii
Director of Photography
Rampo Edogawa
Original Story
Tadashi Ogawa
Screenplay
