ONE PIECE（ワンピース）is a Japanese shōnen manga series written and illustrated by Eiichiro Oda. It has been serialized in Weekly Shōnen Jump since August 4, 1997; the individual chapters are being published in tankōbon volumes by Shueisha, with the first released on December 24, 1997, and the 64th volume released as of November 2011. One Piece follows the adventures of Monkey D. Luffy, a 17-year-old boy who gains elastic abilities after inadvertently eating a supernatural fruit, and his diverse crew of pirates, named the Straw Hat Pirates. Luffy explores the ocean in search of the world's ultimate treasure known as the One Piece and to become the next Pirate King. Along his journey, Luffy makes several friends and battles a wide variety of villains, many of whom try to capture the Straw Hats.
The chapters have 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. Since then, the still ongoing series has aired over 500 episodes. Additionally, Toei has developed eleven animated feature films, an OVA, 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.