Toshiyuki Toyonaga (豊永 利行, Toyonaga Toshiyuki, born April 28, 1984) is a Japanese actor, voice actor and singer. Since his first time on the stage at age 10, Toyonaga has been active both on television and stage. Following his debut as a voice actor in 2002, he currently works with the Super Eccentric Theater Inc. Roles he starred in include Mikado in Durarara!!, Shun Matsuoka in Kimi to Boku, Hideyoshi Nagachika in Tokyo Ghoul, Yuuki Tenpouin in Code:Breaker, Mahiro Fuwa in Blast of Tempest, Takeru Totsuka in Kamigami no Asobi, and Goushi Kaneshiro in B-Project: Kodou*Ambitious. Along with his acting career, Toyanaga has also released a series of indie singles and released his first album, Music of the Entertainment, on April 28, 2014. He later debuted on a major label with the single "Reason" on December 16, 2014 as the theme song to the game Durarara!! Relay.