Yasu Masashige (正まさ成しげ 安やす: Masashige Yasu) is the youngest of The Masashige Family - the son of his parents, Daku and Keiko - and the great-grandson (10 generations) of Kusonoki Masashige.He has a preference for spicy-flavored foods.he is dumb when he wants to,and even dumber when joking at serious times,he is silly compared to his bestfriend uchiumi isamu,japanese nationality.he really loves his cousin masashige juno and along with uchiumi isamu,isamu and him sometimes has a bad relationship.