Masashi Hamauzu (浜渦 正志, Hamauzu Masashi, born September 20, 1971) is a Japanese video game composer who was employed at Square Enix from 1996 to 2010. He is best known for his work on the Final Fantasy and SaGa series. Born into a musical family in Germany, Hamauzu was raised in Japan. He became interested in music while in kindergarten, and took piano lessons from his parents.

Hamauzu was hired by Square (now Square Enix) as a trainee, and his debut as a solo composer came the following year when he scored Chocobo no Fushigina Dungeon. He has collaborated with his friend and fellow composer Junya Nakano on several games, and has worked closely with synthesizer programmer Ryo Yamazaki on most titles since SaGa Frontier 2.