It was a time when pirates ruled the seas. Several bands of pirates were battling over the great hidden treasure, One Piece, which was left by the now legendary pirate captain, Gold Roger. There was a young boy who admired the pirates, his name was Monkey D. Luffy. One day, he mistakenly eats the devil's fruit and turns himself into a rubber human being.

Ten years have passed since that incident. Luffy sets out to sail all alone. He sets out to become a great pirate captain and that's when his great adventure begins. "I'm going to be the Pirate King! I'm going to get One Piece!".

Note: Starting in 2026, the series ended its continuous year-round broadcast schedule and shifted to a split-cour format, with two 13-episode cours per each year.

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Side story: One Piece (2000)
Side story: One Piece: Nejimakijima no Bouken
Side story: One Piece: Chinjuujima no Chopper Oukoku
Side story: One Piece The Movie: Dead End no Bouken
Side story: One Piece: Norowareta Seiken
Side story: One Piece: Omatsuri Danshaku to Himitsu no Shima
Side story: One Piece: Taose! Kaizoku Ganzack
Side story: One Piece The Movie: Karakurijou no Mecha Kyohei
Summary: One Piece: Episode of Arabasta - Sabaku no Oujo to Kaizoku-tachi
Alternative version: One Piece The Movie: Episode of Chopper Plus - Fuyu ni Saku, Kiseki no Sakura
Side story: One Piece Special: Romance Dawn Story
Side story: One Piece Film: Strong World
Side story: One Piece Film: Strong World - Episode 0
Side story: One Piece 3D: Mugiwara Chase
Side story: One Piece 3D: Gekisou! Trap Coaster
Side story: One Piece Film: Z
Side story: One Piece Film: Gold
Side story: Gekijouban One Piece: Stampede
Side story: Tokyo One Piece Tower: Tongarijima no Dai Hihou
Side story: One Piece Film: Red
Same setting: Monsters: Ippyaku Sanjou Hiryuu Jigoku
Alternative version: The One Piece
Other: Koi Suru One Piece
Side story: One Piece Novel Heroines