Young Furuhata, a 3rd-year junior high student from Tokyo, transferred to a school in the countryside due to family circumstances. He doesn't fit in at first, but he eventually gains a reputation as a detective and opens his own detective agency. One day, he hears about the town's legend of buried treasure, and he immediately begins unraveling the mystery.
| Actor | Role |
|---|---|
 Masakazu TamuraNinzaburo Furuhata | Ninzaburo Furuhata |
 Ryosuke YamadaNinzaburo Furuhata | Ninzaburo Furuhata |
 Taizo HaradaNot listed | Not listed |
 Kazuyuki AsanoNot listed | Not listed |
 Soran TamotoOtokichi Mukojima | Otokichi Mukojima |
 Mayuko FukudaAsuka Tobe | Asuka Tobe |
 Masahiro KomotoGamagori | Gamagori |
 Taro IshidaPriest | Priest |
 Takashi KobayashiOtokichi Mukojima | Otokichi Mukojima |
 Yoichi NukumizuOnoda | Onoda |
 Yuriko IshidaNinzaburo Furuhata's mother | Ninzaburo Furuhata's mother |