Quick answer — Eiji Yanagisawa voices Kiyosumi Morimura in The Melancholy of Haruhi Suzumiya, Okabe in The Melancholy of Haruhi Suzumiya, Umpire in The Melancholy of Haruhi Suzumiya and 4 more characters.
Eiji Yanagisawa voices Kiyosumi Morimura (The Melancholy of Haruhi Suzumiya), Okabe (The Melancholy of Haruhi Suzumiya), Umpire (The Melancholy of Haruhi Suzumiya), Takayanagi (Genshiken), Shokuin (Tonari no Seki-kun: The Master of Killing Time), Kratt (Gun x Sword), Nishiya (Speed Grapher).
Kiyosumi Morimura is voiced in Japanese by Eiji Yanagisawa.
