Kawamatsu Kappa is a loyal samurai and sumo wrestler from the Wano Country in the anime and manga series One Piece. He belongs to the Mink Tribe and is known as 'Kawamatsu the Kappa' due to his resemblance to the mythical kappa creature. Kawamatsu is a devoted retainer of the Kozuki Family, particularly loyal to Kozuki Oden. He plays a pivotal role in the Wano arc, assisting the Straw Hat Pirates and their allies in the fight against the tyrannical shogun Orochi and the pirate Kaido.