- Country: Japan
- Genres: Action, Adventure, Animation
- Release: 2005-03-05
- Director: Mamoru Hosoda
- Writers: Masahiro Ito , Eiichiro Oda
- Language: Japanese
- Stars: Takeshi Aono , Shô Ayanokôji , Kohei Fukuhara , Keiji Hirai , Hiroaki Hirata , Sosuke Ikematsu , Hidehiko Kaneko , Takeharu Kunimoto , Takeshi Kusao , Junichi Miyake
- Runtime: 88 min
- Awards: N/A
- AKA: One Piece: Baron Omatsuri and the Secret Island , Ван-Пис 6 (Russian Federation) , ONE PIECE ワンピース THE MOVIE オマツリ男爵と秘密の島 (Japan) , One piece: Omatsuri danshaku to himitsu no shima , ONE PIECE:祭典男爵與神祕島 (Taiwan) , One Piece: Baron Omatsuri and the Secret Island (United States of America) , Đảo Hải Tặc 6: Nam Tước Omatsuri Và Hòn Đảo Bí Mật (Vietnam) , One Piece: Le Baron Omatsuri et l'Île aux secrets (France, French Republic) , One Piece - L'isola segreta del barone Omatsuri (Italy) , One Piece. El Barón Omatsuri y la Isla de los Secretos (Spain) , One Piece: Baron Omatsuri and the Secret Island (United Kingdom) , One Piece - Baron Omatsuri und die geheimnisvolle Insel (Germany)
- Plot:
The Straw Hats visit a recreational island, run by Baron Omatsuri, the former captain of a pirate crew, who were all killed years ago. Being the only survivor, he then started hating all close-knit groups of pirates and wishing to separate them. He and his henchmen seed distrust among the Straw Hats and capture them one by one, leaving only Luffy to free his crew from the Baron’s hold.
- IMDB:tt1018764
One Piece: Baron Omatsuri and the Secret Island Cast · · · ALL
Mamoru Hosoda
Director
Mayumi Tanaka
Monkey D. Luffy (voice)
Kazuya Nakai
Roronoa Zoro (voice)
Akemi Okamura
Nami (voice)
Kappei Yamaguchi
Usopp (voice)
Hiroaki Hirata
Sanji (voice)
Ikue Otani
Tony Tony Chopper (voice)
Yuriko Yamaguchi
Nico Robin (voice)
Akio Otsuka
Baron Omatsuri (voice)
Takeshi Kusao
Muchigoro (voice)
Takeshi Aono
Kerojii (voice)
Masaharu Sato
Keroshot (voice)
Joji Yanami
Kerodeek (voice)
Keiko Yamamoto
Keroko (voice)
Anzu Nagai
Daisy (voice)
Sosuke Ikematsu
DJ Gappa (voice)
Makiko Ohmoto
Rosa (voice)
Daisuke Sakaguchi
Rick (voice)
Misa Watanabe
Lily Carnation (voice)
Yoshito Yasuhara
Brief (voice)
Shô Ayanokôji
Kotetsu (voice)