Okan

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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] Past 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