Masayuki Hirai is a Japanese voice actor and stage performer affiliated with the talent agency Mouvement. He is a native of Shiga Prefecture and was born on September 3rd.

Hirai is most widely recognized for his role as the second King in the 2022 Netflix anime series Tekken: Bloodline, an adaptation of the popular fighting game franchise. In this series, he provided the Japanese voice for the character, a Mexican luchador and orphanage director who competes in the King of Iron Fist Tournament. His other anime credits include minor roles in long-running and popular series such as Detective Conan, where he voiced a zombie character, and Magi: Adventure of Sinbad, in which he played various soldier and civilian roles. He has also appeared in Tsukiuta. The Animation as a store clerk and in the anime Aragne no Mushi as a radio DJ.

Beyond anime, Hirai's voice work extends to dubbing foreign films and series, with a credit in the film Mother/Android. He has also lent his voice to the gaming world, most notably in the fantasy role-playing game Shoujo to Dragon: Genjuu Keiyaku Cryptract, where he voiced multiple characters including Felix and Zeruel. His work as a narrator includes the puppet drama Mori no Suzuro and various online content.

In addition to voice work, Hirai is an active stage actor. He has performed in numerous stage productions and reading dramas, including immersive theater in Tokyo and plays such as Rebirth ni Togewo Komete. His talents also encompass on-screen appearances in television program reenactments and work as a print model for magazines like DIME and non-no. On his agency profile, Hirai shares that his personal interests include reading, watching films, singing, and a particular fondness for anko (sweet bean paste).