
Quick answer — Taketoshi Kawano voices Tomura in Erin, Kyouhei Sera in Giant Killing, Shifu in Spiritpact -Bond of The Underworld- and 2 more characters.
Taketoshi Kawano voices Tomura (Erin), Kyouhei Sera (Giant Killing), Shifu (Spiritpact -Bond of The Underworld-), Katsuyuki Saigo (Sumomomo Momomo: Chijou Saikyou no Yome), Hajime Uesugi (Code:Breaker).
Tomura is voiced in Japanese by Taketoshi Kawano.