Masao Sugiuchi — Japanese 9‑dan professional Go player

Career and achievements

Sugiuchi accumulated more than 800 official wins over the course of his career, a milestone reflecting many decades of competitive play. He reached and maintained the 9‑dan rank, which marks a lifetime of exceptional results and experience. From 2004 until his death in 2017 he held the distinction of being the oldest active professional Go player in Japan.

Although Sugiuchi did not become associated with a single defining tournament title, his longevity and steady presence in the professional scene were themselves notable. He remained affiliated with the Japanese professional system into advanced age, continuing to participate in the community of players, events, and teaching activities.

Context and significance

Sugiuchi’s life and work illustrate the continuity of professional Go across the twentieth and early twenty‑first centuries in Japan. Players who reach 9‑dan are widely respected for their deep understanding of the game and for contributions to its culture; Sugiuchi’s long career made him a living link between generations of players.

Notable facts

• Full name: Masao Sugiuchi (杉内雅男).
• Born: October 20, 1920. Died: November 21, 2017.
• Rank: 9‑dan professional.
• Career wins: surpassed 800 official victories.
• Oldest active professional player in Japan from 2004 to 2017.

Today Sugiuchi is remembered primarily for his dedication to Go and for the remarkable span of his professional life. For readers seeking further general information about the game in which he made his career, see resources on Go.