Josuke is a high school first-year residing in the town of Morioh. He is the protagonist of JoJo's Bizarre Adventure - Part IV, Diamond is Unbreakable. He soon meets Jotaro Kujo, who informs him that he is Joseph Joestar's illegitimate son. After his grandfather dies, Josuke takes it upon himself to protect his beloved town from malevolent Stand users. Josuke wields Crazy Diamond, a powerful Stand with the power to repair almost anything. Okuyasu Nijimura became a good friend of his.