- Minami Takayama (Conan Edogawa (voice))
- Kappei Yamaguchi (Shinichi Kudo (voice))
- Wakana Yamazaki (Ran Mouri (voice))
- Akira Kamiya (Kogoro Mouri (voice))
- Rikiya Koyama (Kogoro Mouri (voice))
- Megumi Hayashibara (Ai Haibara (voice))
- Kenichi Ogata (Hiroshi Agasa (voice))
- Yukiko Iwai (Ayumi Yoshida (voice))
- Wataru Takagi (Genta Kojima (voice))
- Ikue Otani (Mitsuhiko Tsuburaya (voice))
- Chafurin (Juzo Megure (voice))
Detective Conan — S1E377
Episode: Momotaro Mystery Solving Tour (1)
Air Date: 2004-11-08
Runtime: 25 min
Overview
The Detective Boys along with Dr. Agasa went to the Okayama prefecture to visit the museum. Later, they found a group of guys, childhood friends, who gathered to celebrate the marriage of two of them. The Detective Boys noticed a container floating in the water and discover that inside is a secret message.