
Quick answer — Takehiro Hasu voices Genpei Oono in ID: INVADED, Marehiko Itsuki in Tennis no Ouji-sama: Zenkoku Taikai-hen, Nabe-san in Tonari no Yokai-san and 11 more characters.
Takehiro Hasu voices Genpei Oono (ID: INVADED), Marehiko Itsuki (Tennis no Ouji-sama: Zenkoku Taikai-hen), Nabe-san (Tonari no Yokai-san), Dorei Shounin (A Journey Through Another World: Raising Kids While Adventuring), Marjace (Fluffy Paradise), Yuuri (Muhyo & Roji’s Bureau of Supernatural Investigation Season 2), Guild Master (Kemono Michi: Rise Up), Runier (I Shall Survive Using Potions!) and 6 more.
Genpei Oono is voiced in Japanese by Takehiro Hasu.