Fumiya Yazaki, born February 25, 1970 in Fukuoka, Japan, is a Japanese voice actor known primarily for his work in anime series and Japanese dubbing of foreign films and television shows.

Yazaki is most recognized for his long-standing role as the Japanese voice of Colonel William Lennox, a character portrayed by actor Josh Duhamel in the live-action Transformers film series. He provided the voice for this character across multiple films in the franchise, including the first Transformers film, Transformers: Revenge of the Fallen, Transformers: Dark of the Moon, and Transformers: The Last Knight. This series of performances is a central part of his career as a dubbing actor.

In addition to his dubbing work, Yazaki has voiced characters in several notable anime series. In the long-running detective series Detective Conan, he played the role of Masami Kusaka in episode 66. He was also cast in Naruto Shippuden as the characters Ginkaku and Kanabun. His other anime roles include Tsukimori's Father in La Corda D'Oro - primo passo, Schleicher in the legendary space opera The Legend of the Galactic Heroes, and Akatsuki Ogura in both Shinkansen Henkei Robo Shinkalion the Animation and its sequel Shinkansen Henkei Robo Shinkalion Z. He also appeared in the film Nagasaki 1945: The Angelus Bells.

Yazaki also contributed to the Street Fighter franchise, taking on the role of Sawada in the TV Asahi broadcast version of the live-action Street Fighter movie.