屋良里之子 (Yara no Satonushi, or Satonoshi according to mainland Japanese reading.)
Ryukyuan player who visited Japan in 1710. Played two games with Dochi at 3 stone handicap and lost both.
Also see Ryukyuan players
I think this player's name should be more accurately spelled as "Yara no Satonoshi". There's a good story about him included in the book "Appreciating Famous Games".