
Quick answer — Takuma Suzuki voices Shinjirou Hayashida in Cromartie High School, Baka Ki El Dogra in Hunter x Hunter (2011), Hirama in Parasyte -the maxim- and 11 more characters.
Takuma Suzuki voices Shinjirou Hayashida (Cromartie High School), Baka Ki El Dogra (Hunter x Hunter (2011)), Hirama (Parasyte -the maxim-), Kensaku Kitamura (Cross Game), Mamoru Uda (Parasyte -the maxim-), Hajime Katahira (Nodame Cantabile Finale), Yoshiyuki Arai (Kimi ni Todoke: From Me to You), Jean (Parallel World Pharmacy) and 6 more.
Shinjirou Hayashida is voiced in Japanese by Takuma Suzuki.