Case Closed - Season 1 Episode 136 The Old Blue Castle Investigation Case (1)
The Detective Boys are on a camping trip but Dr. Agasa forgot the tent. They wander to a castle owned by Masuyo Mamiya, meet Katsuo Tabata, Mitsuru Mamiya, Takahito Mamiya, and learn that there's a secret treasure somewhere inside.
- Genre: Animation, Mystery, Comedy
- Studio: YTV
- Keyword: japan, detective, secret identity, high school, cop, based on manga, anime, age change, case
- Cast: Minami Takayama, Kappei Yamaguchi, Wakana Yamazaki, Akira Kamiya, Rikiya Koyama, Megumi Hayashibara
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