Debut: Episode 946 "Blood-Writing" Omasa is a yakuza boss who was in charge of the Udon region in Wano Country. He was imprisoned in Udon by the Beasts Pirates, but was freed when Luffy took over the prison. (Source: One Piece Wiki) No voice actors have been added to this character. Help improve our database by searching for a voice actor, and adding this character to their roles .