O Meisa
- Japanese/Chinese: 王 明佐 (Ô Meisa / Wáng Míngzuǒ)
Ô Meisa, or Wáng Míngzuǒ, was a Ryukyuan scholar-official who served as vice envoy (正議太夫, J: seigi dayû, C: zhèngyì dàfū) on several Ryukyuan tribute missions to China, in 1669, 1680, and 1684.