Kouzou Wakamatsu supports Kyotarou Oshima, the young chief of Kuroda. He also takes care of the younger members of the group.
Kouzou Wakamatsu was created by mangaka Kozueko Morimoto. In the anime, he is voiced by Kenji Anan in the original Japanese and Mike Pollock in the English dub. Kenji Anan also portrayed the character in the live action drama.