One Piece: Baron Omatsuri and the Secret Island is a 2005 anime film directed by Mamoru Hosoda and produced by Toei Animation. It is the sixth animated feature film of the One Piece film series, based on the manga of the same name written and illustrated by Eiichiro Oda. It premiered in Japan on March 5, 2005, and was released to DVD on July 21, 2005.