| Masao Sugiuchi | |
| Fullname: | Masao Sugiuchi |
| Nickname: | The God of Go |
| Kanji: | 杉内雅男 |
| Birth Date: | 20 October 1920 |
| Birth Place: | Miyazaki, Japan |
| Death Place: | Tokyo, Japan |
| Residence: | Tokyo, Japan |
| Teacher: | Ichiro Inoue |
| Turnedpro: | 1941 |
| Rank: | 9 dan |
| Affiliation: | Nihon Ki-in |
Born in Miyazaki, Japan, in 1920, Sugiuchi became a professional in 1941. By 1959, he had reached 9 dan. His nickname was "the God of Go" (Japanese 碁の神様, Go no Kami-sama)[1] because of his serious style and strait-laced personality. In December 2004, he became the oldest Nihon Ki-in professional to reach 800 career wins. He was married to Kazuko Sugiuchi (née Honda), one of three professional go-playing sisters.
Sugiuchi died in Tokyo on November 21, 2017, at the age of 97.[2]
| Title | Years Lost | |
|---|---|---|
| Current | 4 | |
 Honinbo | 1954, 1958 | |
| Tengen | 1976 | |
| NHK Cup | 1982 |