One Piece first debuted in 1997, and since then, the sea-faring series has become one of the best-selling media franchises of all time. Because of its widespread acclaim, One Piece stands as one of the most influential titles in the history of anime, joining Naruto and Bleach as one-third of the trio known by shonen fans as the genre's Big Three.
Source：https://www.cbr.com/one-piece-earned-big-three-status/
