Popularity and influence have made One Piece an undisputable king of the shonen genre and has always been praised for its limitless creativity. Eiichiro Oda never feared breaking the shonen conventions, daring to incorporate bold character designs, mature political themes, and morally ambiguous heroes into what most saw as a lighthearted pirate adventure.
Source：https://www.cbr.com/one-piece-shonen-cliches/
