The Wano Arc is a significant storyline in the popular manga and anime series One Piece. It takes place in the isolated country of Wano, which is inspired by feudal Japan. The arc focuses on the Straw Hat Pirates as they ally with local samurai and rebels to overthrow the tyrannical rule of Kaido, one of the Four Emperors. Throughout the arc, themes of honor, freedom, and rebellion are explored. The story introduces new characters, such as Kozuki Oden and Toki, while also delving into the history of Wano and its connection to the larger One Piece world.