
Kouichi Hirose (広瀬康一) is a main character in JoJo's Bizarre Adventure: Diamond is Unbreakable and 1 other title, voiced in Japanese by Yuuki Kaji. The series' music includes "Jojo's Bizarre Adventure Diamond is Unbreakable - Opening 1 ||", "JoJo's Bizarre Adventure Part 4: Diamond is Unbreakable Ending".