Yasunaga Hajime (安永 一; December 3, 1901 – February 2, 1994) was the strongest and most famous amateur Go player of the 20th century in Japan. As a professional Go journalist, author and editor, and long-time undisputed strongest amateur player in Japan, Yasunaga was personally acquainted with most of the strong Japanese professional players from the 1920s to the 1980s.
Source: “Hajime Yasunaga”, English Wikipedia (CC BY-SA 4.0), excerpt
