
Quick answer — Jin Horikawa voices Jikkyou Announcer in Hajime no Ippo: The Fighting!, Yokoi in NANA, Akira Wataya in Chihayafuru and 7 more characters.
Jin Horikawa voices Jikkyou Announcer (Hajime no Ippo: The Fighting!), Yokoi (NANA), Akira Wataya (Chihayafuru), Nobuhiko Akiyama (Initial D 4th Stage), Flint (Oban Star-Racers), Grooor (Oban Star-Racers), Igor Planter (Black Cat), Taiso Sakura (Mahoromatic: Automatic Maiden) and 2 more.
Jikkyou Announcer is voiced in Japanese by Jin Horikawa.