Nakazono Seizo

Nakazono Seizo (中園清三, 1949 -) is a strong Japanese amateur and winner of the Amateur Honinbo in 1990, 1992, 1995 and 2011. Awarded the Okura Prize in 2021.

Games list and go rating evolution: https://www.goratings.org/en/players/860.html?

He's beaten:

• Yamamoto Masato, professional
• Hara Sachiko, female professional
• Aoba Kaori, female professional
• Pavol Lisy, two years before he went pro
• Diana Koszegi, four years before she went pro
• Lukáš Podpěra, in the year he became the European Youth Champion

He was formerly the manager of "The Sunshine Go Club, 9th floor of the Sunshine Building in Tokyo’s east Ikebukuro neighborhood", "situated in a lovely space facing Ikebukuro district, with an awesome view." (The club closed in 2020)