Koki Uchiyama

Koki Uchiyama is a Japanese voice actor born on August 16, 1990 in Saitama, Japan. Active in the film industry, Uchiyama provides voice performances for animated features and series, working under the Himawari Theater Group. Their roles include voicing characters in major productions, contributing to the audio dimension of these works.

Uchiyama’s filmography includes Evangelion: 3.0+1.0 Thrice Upon a Time as Ryōji Kaji, Violet Evergarden: Recollections as Benedict Blue, and HAIKYU!! The Dumpster Battle as Kei Tsukishima. In 2025, they are credited as the voice of a character in Scarlet. These performances place Uchiyama within the field of animated film voice acting, where vocal performances help shape characters and narratives.