Masanao (written: 政直, 正直, 昌直 or 雅尚) is a masculine Japanese given name. Notable people with the name include:
*, Japanese physician
*, Japanese diplomat
*, Japanese ''daimyō''
*, Japanese ''daimyō''
*, Japanese samurai
*, Japanese samurai, philosopher and educator
*, Japanese politician
*, Japanese footballer
*, Mongolian sumo wrestler
*, Japanese ''daimyō''
*
Masanao (sculptor)
{{given name
Japanese masculine given names