Koki Uchiyama

Koki Uchiyama (also credited as Uchiyama Kouki or Uchiyama Kōki; Japanese: 内山 昂輝) is a Japanese actor, voice actor, and singer born on August 16, 1990, in Saitama, Japan. Known for a cool, controlled delivery and sharp emotional turns, he has become a familiar presence across major anime films and series.

Uchiyama is affiliated with the Himawari Theater Group and has earned industry recognition for his work, including Best Rookie Actor at the 5th Seiyū Awards (2011) and Best Voice Actor at the Tokyo Anime Awards (2015). Those honors reflect a career built on versatility—moving easily between understated drama and high-intensity action.

His notable voice roles include Ichika Orimura in Infinite Stratos, Ikuya Kirishima in the Free! franchise (including Road to the World - The Dream and the Final Stroke the Second Volume), and Kei Tsukishima in HAIKYU!! The Dumpster Battle. He also voices Rin Itoshi in BLUE LOCK THE MOVIE -EPISODE NAGI- and Lancelot in The Seven Deadly Sins: Grudge of Edinburgh Part 2.

More recently, Uchiyama appears as Kenichi Kohiruimaki in Dead Dead Demon's Dededede Destruction Parts 1 and 2, continuing to expand a filmography defined by standout ensemble work and memorable character voices.