Masayuki Deai (出合 正幸 Deai Masayuki, January 21, 1981) is a Japanese actor from Osaka Prefecture. He is most famous for his portrayal of Eiji Takaoka in the tokusatsu series GoGo Sentai Boukenger.
His first on-screen appearance was as an extra in the 2003 American film, The Last Samurai.
He made a return to the tokusatsu genre in 2010, appearing as the Trigger Dopant in Kamen Rider W Forever: A to Z/The Gaia Memories of Fate