Birthdate: July 15, 1993
I only took notice of Hasshi after Hey! Say! JUMP debuted and he was made center of a trio of Juniors. I was surprised to learn that he was the same age as most of the younger members of HSJ as he looked at least two years older.
I was unsure of having him join A.B.C. to become A.B.C-Z. He certainly had a good enough voice and could dance but acrobatics was not something I would think he could do. But it turned out well for him as he has learned a lot from the other members.