Seventh film in the Boy Detectives Club series.
Susumu Namishima
Kogoro Akechi
Hitomi Nakahara
Mariko
Yūnosuke Itō
The Fiend with Twenty Faces
Hiroshi Yamate
Kobayashi
Yasushi Obata
Shimada
Mitsue Komiya
Mitsue
Sanae Mitsuoka
Akiko Shimada
Akiko Kazami
Lady Shimada
Takashi Kanda
Jiro Takagi
Kuroda
Tokuro Konishi
Jun Usami
Keiichiro Shimada
