Manabe voiced minor characters in anime series such as A Couple of Cuckoos, Date A Live IV, Hensuki, My Girlfriend is Shobitch, My Unique Skill Makes Me OP even at Level 1, and Uzaki-chan Wants to Hang Out!.
He also voiced a character for the Japanese dub of the Doctor Who series episode "The Church of Ruby Road."
Manabe also lent his voice for the Just Cause 3 game, and the Marvel's Wastelanders audiobook.
Source: Production Ace agency's website