He is known for his voice roles in anime series and films, specials, original video animation, and video games.
He is best known for his roles on Steins;Gate, Durarara!
!, Death Note, Soul Eater, Wolf's Rain, Ouran High School Host Club, Ajin: Demi-Human, Fullmetal Alchemist: Brotherhood, Free!, Mobile Suit Gundam 00, Hunter x Hunter, Chihayafuru, Bungo Stray Dogs, Uta no Prince-sama and Zombieland Saga.
Miyano won the Best Voice Actor award at the 2008 Tokyo International Anime Fair.
At the 2nd Seiyu Awards, he won Best Lead Actor Award for his role as Setsuna F. Seiei in Mobile Suit Gundam 00 and Hakugen Rikuson in Kōtetsu Sangokushi.