One Piece (ワンピース, Wan P?su) is a Japanese manga series written and illustrated by Eiichiro Oda, with an anime adaptation produced by Toei Animation. It focuses on a ragtag crew of heroic pirates, formed and led by Monkey D. Luffy. Luffy's greatest ambition is to obtain the world's ultimate treasure, One Piece, and become Pirate King.   Wikipedia