| Ōza (Ir) | |
|---|---|
| Nombre completo | Ōza |
| Empezado | 1953 |
| Ganadores honorarios | Masao Kato |
| Patrocinadores | El nikkei |
| Dinero del premio | ¥ 14 millones $ 173.000 (al 2 de julio de 2011) |
| Afiliación | Nihon Ki-in |
Ōza (王座, "trono") es un título en Go. La asociación que ostenta este título es la japonesa Nihon Ki-in.
Recientemente, el formato del torneo se cambió al mejor de cinco. El retador se decide en un torneo de 16 jugadores, además del jugador titular. La bolsa del ganador es de ¥ 14 millones ($ 173,000).
| Año | Ganador | Puntaje | Subcampeón |
|---|---|---|---|
| 1953 | Utaro Hashimoto | 1–0 | Nobuaki Maeda |
| 1954 | Kaku Takagawa | 2-1 | Hidehiro Miyashita |
| 1955 | Utaro Hashimoto | 2-1 | Toshihiro Shimamura |
| 1956 | 2-0 | Eio Sakata | |
| 1957 | Toshihiro Shimamura | 2-0 | Dogen Handa |
| 1958 | Hosai Fujisawa | 2-0 | |
| 1959 | Shoji Hashimoto | 2-0 | Toshiro Yamabe |
| 1960 | Dogen Handa | 2-0 | Hidehiro Miyashita |
| 1961 | Eio Sakata | 2-1 | Kaku Takagawa |
| 1962 | Hidehiro Miyashita | 2-0 | Katsuji Kada |
| 1963 | Eio Sakata | 2-0 | Hosai Fujisawa |
| 1964 | 2-0 | Takeo Kajiwara | |
| 1965 | Dogen Handa | 2-0 | Ichigen Okubo |
| 1966 | Eio Sakata | 2-1 | Rin Kaiho |
| 1967 | Hideyuki Fujisawa | 2-0 | Shoji Hashimoto |
| 1968 | 2-0 | Eio Sakata | |
| 1969 | 2-0 | Hideo Otake | |
| 1970 | Eio Sakata | 2-0 | Hideyuki Fujisawa |
| 1971 | 2-0 | Shoji Hashimoto | |
| 1972 | 2-1 | Utaro Hashimoto | |
| 1973 | Rin Kaiho | 2-1 | Eio Sakata |
| 1974 | Yoshio Ishida | 2-1 | Rin Kaiho |
| 1975 | Hideo Otake | 2-0 | Yoshio Ishida |
| 1976 | Cho Chikun | 2-1 | Hideo Otake |
| 1977 | Norio Kudo | 2-0 | Cho Chikun |
| 1978 | Yoshio Ishida | 2-1 | Norio Kudo |
| 1979 | Masao Kato | 2-0 | Yoshio Ishida |
| 1980 | 2-0 | ||
| 1981 | Shoji Hashimoto | 2-1 | Masao Kato |
| mil novecientos ochenta y dos | Masao Kato | 2-0 | Shoji Hashimoto |
| 1983 | 2-0 | Hideo Otake | |
| 1984 | 3-0 | Hiroshi Yamashiro | |
| 1985 | 3-0 | Koichi Kobayashi | |
| 1986 | 3-1 | Rin Kaiho | |
| 1987 | 3-1 | Cho Chikun | |
| 1988 | 3-0 | Masaki Takemiya | |
| 1989 | 3-1 | Yasumasa Hane | |
| 1990 | Yasumasa Hane | 3-2 | Masao Kato |
| 1991 | Hideyuki Fujisawa | 3-1 | Yasumasa Hane |
| 1992 | 3-2 | Koichi Kobayashi | |
| 1993 | Masao Kato | 3-0 | Hideyuki Fujisawa |
| 1994 | Cho Chikun | 3-2 | Masao Kato |
| 1995 | O Rissei | 3-0 | Cho Chikun |
| 1996 | Ryu Shikun | 3-0 | O Rissei |
| 1997 | Kimio Yamada | 3-1 | Ryu Shikun |
| 1998 | O Rissei | 3-0 | Kimio Yamada |
| 1999 | 3-1 | Cho Chikun | |
| 2000 | 3-1 | ||
| 2001 | Cho Chikun | 3-0 | O Rissei |
| 2002 | Oh Meien | 3-2 | Cho Chikun |
| 2003 | Cho U | 3-1 | Oh Meien |
| 2004 | 3-1 | Keigo Yamashita | |
| 2005 | 3-0 | ||
| 2006 | Keigo Yamashita | 3-1 | Cho U |
| 2007 | 3-1 | Toshiya Imamura | |
| 2008 | Cho U | 3-1 | Keigo Yamashita |
| 2009 | 3-0 | Kimio Yamada | |
| 2010 | 3-0 | ||
| 2011 | 3-0 | Hane Naoki | |
| 2012 | Yuta Iyama | 3-0 | Cho U |
| 2013 | 3-1 | ||
| 2014 | Daisuke Murakawa | 3-2 | Yuta Iyama |
| 2015 | Yuta Iyama | 3-0 | Daisuke Murakawa |
| 2016 | 3-0 | Seiki Yo | |
| 2017 | 3-0 | Ryo Ichiriki | |
| 2018 | 3-2 | ||
| 2019 | Shibano Toramaru | 3-1 | Yuta Iyama |
| 2020 | 3-1 | Kyo Kagen (Hsu Chia Yuan) |
