Toshiyuki Toyonaga (豊永 利行, Toyonaga Toshiyuki) is a Japanese actor and singer. He began working on television and stage as a child actor. Following his debut as a voice actor in 2002, he currently works with the Super Eccentric Theater Inc. He played Mikado Ryugamine in Durarara! !, Yuri Katsuki in Yuri on Ice, 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 Goshi Kaneshiro in B-Project.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.