
Quick answer — Shuuhei Sakaguchi voices Kyousuke Kawachi in Yakitate!! Japan, Yuusuke Takinoue in HAIKYU!! 3rd Season, Grabowski in Orb: On the Movements of the Earth and 19 more characters.
Shuuhei Sakaguchi voices Kyousuke Kawachi (Yakitate!! Japan), Yuusuke Takinoue (HAIKYU!! 3rd Season), Grabowski (Orb: On the Movements of the Earth), Li Xiao (Link Click), Hua Lung Lee (BANANA FISH), Hiroya Okuyama (Initial D Fifth Stage), Mikio Kousaka (Zom 100: Bucket List of the Dead), Rudra (Record of Ragnarok II) and 14 more.
Kyousuke Kawachi is voiced in Japanese by Shuuhei Sakaguchi.