Eiichirô Oda gifted the five main cast members with custom made shirts to celebrate the casting announcement, featuring illustrations of their characters.
"One Piece" creator Eiichirô Oda worked closely with the directors and writers to ensure the show would be as close to his vision as possible.
The Japanese dub of the show has the original voice actors of All'arrembaggio! - One Piece (1999) reprising their original roles: notable examples include Mayumi Tanaka (Luffy), Kazuya Nakai (Zoro), Kappei Yamaguchi (Usopp), Akemi Okamura (Nami), Hiroaki Hirata (Sanji), Shûichi Ikeda (Shanks), Masane Tsukayama (the second Gold Roger), Mika Doi (Coby), Kôichi Nagano (Helmeppo), Youko Matsuoka (Alvida), Shigeru Chiba (Buggy), Jin Domon (Lucky Roux and Merry), Mariko Kôda (Kaya) and Wakana Yamazaki (Nojiko).
Most of the ships were built in Cape Town, where much of the show was filmed, such as Going Merry, Miss Love Duck, Baratie, Red Force, Garps' ship, many more pirate and marine ships in order to use them in filming.
Mackenyu grew up a fan of One Piece, with Zoro as his favorite character. He states in the Inside the Story special that he saw it "an honor to be wearing those swords".