
Quick answer — Mantaro Iwao voices Ryosuke Morimi in Eden of the East, Kouun Saegusa in Kamichu!, Tsubota in Black God.
Mantaro Iwao voices Ryosuke Morimi (Eden of the East), Kouun Saegusa (Kamichu!), Tsubota (Black God).
Ryosuke Morimi is voiced in Japanese by Mantaro Iwao.