
Quick answer — Yuudai Satou voices Hiroki Komachi in Chu-Bra!: Panty Appreciation Society, Osamu Nozaki in Akagi, Kazutoshi Oki in Big Windup! and 1 more characters.
Yuudai Satou voices Hiroki Komachi (Chu-Bra!: Panty Appreciation Society), Osamu Nozaki (Akagi), Kazutoshi Oki (Big Windup!), Mamoru Uchuu (Student Council's Discretion Level 2).
Hiroki Komachi is voiced in Japanese by Yuudai Satou.