Masanao (written: 政直, 正直, 昌直 or 雅尚) is a masculine Japanese given name. Notable people with the name include:
Masanao Goto (後藤 昌直) (1857–1908), Japanese physician
Masanao Hanihara (埴原 正直) (1876–1934), Japanese diplomat
Hoshina Masanao (保科 正直) (1542–1601), Japanese daimyō
Inoue Masanao (井上 正直) (1837–1904), Japanese daimyō
Kinoshita Masanao (木下 昌直) (died 1584), Japanese samurai
Nakamura Masanao (中村 正直) (1832–1891), Japanese samurai, philosopher and educator
Masanao Ozaki (尾崎 正直) (born 1967), Japanese politician
Masanao Sasaki (佐々木 雅尚) (born 1962), Japanese footballer
Tokusegawa Masanao (德瀬川 正直) (born 1983), Mongolian sumo wrestler
Tsuchiya Masanao (土屋 政直) (1641–1722), Japanese daimyō
