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The Okan (王冠) is a Go competition conducted by the Japanese Nihon-Kiin. There is a single game played between the title holder and a challenger. Unlike other tournaments which are open to all players, only players in the Nagoya branch of the Nihon-Kiin can compete. The winner's purse is a small 1,700,000 Yen ($15,000).
[edit] Winners
| Player |
Years Held |
| Sakai Toshio |
1950 - 1955 |
| Shimamura Toshihiro |
1957 - 1965, 1974, 1975 |
| Iwata Tatsuaki |
1967 - 1970, 1976, 1979, 1980 |
| Hane Yasumasa |
1972, 1983, 1992 |
| Yamashiro Hiroshi |
1977, 1981, 1982, 1984 - 1987, 1993 - 1996, 2000, 2001, 2005 |
| Ogata Masaki |
1988 - 1991 |
| Nakano Hironari |
1997, 1998 |
| Hane Naoki |
1999, 2002, 2004 |
| Hideki Matsuoka |
2006 |
