The son of Jotaro Kujo And Noiaki Kakyoin. He was born out of an egg laid by Kakyoin. CLAMP made a comic about it. read it, I'm too lazy to explain the rest.
Person 1: "Have you read 'JoJo's Bizarre Married Life'?"
person 2: "Yes. I Wish Jouta Kujo was canon."
A Jewish youth group. Kind of like youth groups in Christian organizations, jouth groups often participate in sing-a-longs and other activities associated with religious groups.