Masao Sugiuchi (杉内雅男, Sugiuchi Masao, October 20, 1920 – November 21, 2017) was a 9-dan professional Go player. He reached to 800 career wins, and he was the oldest professional player in Japan from 2004 to 2017.
His wife is Kazuko Sugiuchi, a professional player who won several female titles. His sisters in law (Sachiko Honda and Teruko Kusunoki) are also professional players.
|Honinbo (本因坊)||Challenged to the defending champion in 1954 and 1958|
|Tengen (天元, Center)||Challenged to the defending champion in 1976|
|NHK Cup||Finalist in 1982|