One Piece: Pirate Warriors 4

One Piece: Pirate Warriors 4 (ワンピース海賊無双4, Wan Pīsu Kaizoku Musō Foa, lit. "One Piece: Pirates Unmatched 4") is the fourth entry in the One Piece: Pirate Warriors series. The game was first revealed on July 5, 2019, at Anime Expo in Los Angeles.

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The first teaser trailer was revealed at Bandai Namco's booth on July 5, 2019, at Anime Expo in Los Angeles.