Rikiya Koyama (小山 力也 Koyama Rikiya) is a Japanese actor and voice actor.
As a voice actor, Rikiya provides the voice of Yamato in Naruto Shippuden and succeeded Akira Kamiya as the voice of Kogoro Mouri in the Detective Conan anime.
In the Kamen Rider Series, he played Joe the Haze in Kamen Rider Black RX, and voices Kamen Rider Bujin Gaim in Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle.
He returned to voice Bujin Gaim in Kamen Rider: Battride War II.
He also voiced Frank Taylor in Japanese dub of Kamen Rider: Dragon Knight
Later he voiced various equipment of Kamen Rider Zi-O, starting with Ziku-Driver and Ridewatches and also the Zi-O's future counterpart, Oma Zi-O.