
Quick answer — Tomohiro Waki voices Mansaku Matsuura in Rainbow, Nabe-chin in Bunny Drop, Fresh the Pike in Mardock Scramble: The First Compression and 1 more characters.
Tomohiro Waki voices Mansaku Matsuura (Rainbow), Nabe-chin (Bunny Drop), Fresh the Pike (Mardock Scramble: The First Compression), Kenyan (Pokémon BW: Rival Destinies).
Mansaku Matsuura is voiced in Japanese by Tomohiro Waki.