Sixth film in the Boy Detectives Club series.
| Actor | Role |
|---|---|
 Susumu NamishimaKogoro Akechi | Kogoro Akechi |
 Masako NakamuraMariko Kishi | Mariko Kishi |
 Chiaki TsukiokaMichiko | Michiko |
| MMiyoshi MoriYukiko | Yukiko |
| KKunio HaraNot listed | Not listed |
| YYasumitsu KomoriKobayashi | Kobayashi |
| JJunji MasudaNot listed | Not listed |
 Takashi KandaNot listed | Not listed |
 Yuriko HamadaNot listed | Not listed |
| MMasahide KomakiNot listed | Not listed |