is a Japanese voice actor, singer and narrator affiliated with Aoni Production.
Kamiya is best-known for the voice of Levi Ackerman in Attack on Titan, Koyomi Araragi in the Monogatari series, Trafalgar Law in One Piece, Mephisto Pheles in Blue Exorcist, Izaya Orihara in Durarara!!, Shinji Matà  in the Fate franchise, Takashi Natsume in Natsume Yà «jin Chà Â, Choromatsu in Mr. Osomatsu, Akashi Seijuro in Kuroko's Basketball, Yuzuru Otonashi in Angel Beats!, Yato in Noragami, Ranpo Edogawa in Bungo Stray Dogs, Nozomu Itoshiki in Sayonara, Zetsubou-Sensei, Sà Âma in Working!!, Juli in Brothers Conflict, Balder Hringhorni in Kamigami no Asobi, Tieria Erde in Mobile Suit Gundam 00, Kiyoshi Fujino in Prison School, Saiki Kusuo in The Disastrous Life of Saiki K. and Kinshirà  Kusatsu in Cute High Earth Defense Club Love!.
He won "Best Lead Actor" and "Best Personality" at the 3rd Seiyu Awards, and "Best Supporting Actor" at the 2nd Seiyu Awards. He hosts the radio show ' with Daisuke Ono.
In July 2016, the tabloid magazine Flash published a photo of Kamiya holding a child, alleging that he had been married to manga artist Hikaru Nakamura for an undetermined amount of time. On July 17, 2016, during the 484th episode of Dear Girl: Stories, Kamiya confirmed himself in the photo but did not directly address the marriage allegations, stating that he wanted to keep his personal life private. On January 1, 2025, actress and model Rina Aizawa announced on her X account that she and Kamiya had registered their marriage.