The manga has been adapted into an original video animation (OVA) produced by Production I.G in 1998, and an anime series produced by Toei Animation, which began broadcasting in Japan in 1999 and has aired 700 episodes to date. Additionally, Toei has developed thirteen animated feature films, two OVAs, and five television specials. Several companies have developed various types of merchandising such as a trading card game, and a large number of video games. The manga series was licensed for an English language release in North America by Viz Media, in the United Kingdom by Gollancz Manga, and in Australia by Madman Entertainment. The anime series was licensed by 4Kids Entertainment for an English-language release in North America, before the license was dropped and subsequently acquired by Funimation in 2007.
One Piece has received widespread critical acclaim, primarily for its art, characterization and humor. Several volumes of the manga have broken publishing records, including highest initial print run of any book in Japan. The series has over 380 million volumes in circulation worldwide, making it the best-selling manga series in history.