Yasuzo Masumura (増村 保造 Masumura Yasuzō, August 25, 1924 - November 23, 1986) was a Japanese film director.
Masumura was born in Kōfu on Honshū. After dropping out of a law course at the University of Tokyo he worked as an assistant director at the Daiei studio, later returning to university to study philosophy; he graduated in 1949. He then won a scholarship allowing him to study film in Italy at the Centro Sperimentale di Cinematografia under Michelangelo Antonioni, Federico Fellini and Luchino Visconti.
Masumura returned to Japan in 1953 and from 1955 worked as a second-unit director on films directed by Kenji Mizoguchi and Kon Ichikawa, before directing his own first film, Kisses, in 1957. Over the next three decades he directed around 60 films in a variety of genres. His work is noted for his dark satire and fluid style. Notable films include Red Angel, Black Test Car, Giants and Toys, Blind Beast and Hoodlum Soldier.