is a Go competition in Japan. It is one of the seven major professional titles.
The Jūdan[1] is a Go competition used by the Japanese Nihon-Kiin and Kansai-Kiin. It was started by the Sankei Shimbun newspaper in 1962. The format is similar to the other big titles in Japan. There is a preliminary tournament that decides the challenger. Although, there is something different about the preliminary tournament. Instead of single knockout, it is a double knockout tournament. There is a losers' section where if a player loses in the preliminary, they go to the losers' section. The winner of the losers' section plays the winner of the winners' section which ultimately decides the challenger for the title. The challenger then plays against the holder in a best of 5 match.
In the Jūdan competition, if a player wins the challenger section, they are promoted to 7 dan. Winning the title gives the player a promotion to 8 dan. If the player subsequently wins another of the second tier top titles (Gosei, Judan, Oza, Tengen), the player will be promoted to 9 dan.[2] The competition had a predecessor, named Hayago Meijin, that ran from 1956 to 1961.
| Year | Winner | Score | Runner-up | ||
| 1 | 1962 | 3–1 | Dogen Handa | ||
| 2 | 1963 | Dogen Handa | 3–1 | Utaro Hashimoto | |
| 3 | 1964 | 3–2 | Dogen Handa | ||
| 4 | 1965 | 3–1 | Hosai Fujisawa | ||
| 5 | 1966 | 3–1 | Kaku Takagawa | ||
| 6 | 1967 | 3–2 | Hosai Fujisawa | ||
| 7 | 1968 | 3–1 | Hideyuki Fujisawa | ||
| 8 | 1969 | 3–0 | Eio Sakata | ||
| 9 | 1971 | Utaro Hashimoto | 3–2 | Hideo Otake | |
| 10 | 1972 | Eio Sakata | 3–2 | Utaro Hashimoto | |
| 11 | 1973 | 3–0 | Shoichi Takagi | ||
| 12 | 1974 | 3–1 | Eio Sakata | ||
| 13 | 1975 | 3–0 | Shoji Hashimoto | ||
| 14 | 1976 | 3–2 | Rin Kaiho | ||
| 15 | 1977 | 3–0 | Eio Sakata | ||
| 16 | 1978 | 3–1 | Rin Kaiho | ||
| 17 | 1979 | 3–1 | Shoji Hashimoto | ||
| 18 | 1980 | Hideo Otake | 3–2 | Masao Kato | |
| 19 | 1981 | 3–0 | Shoji Hashimoto | ||
| 20 | 1982 | 3–1 | Hideo Otake | ||
| 21 | 1983 | Masao Kato | 3–2 | Cho Chikun | |
| 22 | 1984 | 3–2 | Masao Kato | ||
| 23 | 1985 | 3–0 | Hideo Otake | ||
| 24 | 1986 | 3–0 | Masaki Takemiya | ||
| 25 | 1987 | Masao Kato | 3–1 | Koichi Kobayashi | |
| 26 | 1988 | Cho Chikun | 3–2 | Masao Kato | |
| 27 | 1989 | 3–0 | Rin Kaiho | ||
| 28 | 1990 | Masaki Takemiya | 3–2 | Cho Chikun | |
| 29 | 1991 | 3–2 | |||
| 30 | 1992 | 3–1 | Koichi Kobayashi | ||
| 31 | 1993 | Hideo Otake | 3–1 | Masaki Takemiya | |
| 32 | 1994 | 3–2 | Koichi Kobayashi | ||
| 33 | 1995 | 3–0 | Hideo Otake | ||
| 34 | 1996 | 3–1 | O Rissei | ||
| 35 | 1997 | Masao Kato | 3–2 | Norimoto Yoda | |
| 36 | 1998 | 3–2 | Masao Kato | ||
| 37 | 1999 | Koichi Kobayashi | 3–0 | Naoto Hikosaka | |
| 38 | 2000 | 3–0 | Hironari Nakano | ||
| 39 | 2001 | O Rissei | 3–2 | Koichi Kobayashi | |
| 40 | 2002 | 3–2 | Masaki Takemiya | ||
| 41 | 2003 | 3–2 | Shinji Takao | ||
| 42 | 2004 | 3–1 | Cho U | ||
| 43 | 2005 | Cho Chikun | 3–2 | O Rissei | |
| 44 | 2006 | 3–1 | Keigo Yamashita | ||
| 2007 | 3–2 | ||||
| 46 | 2008 | Shinji Takao | 3–0 | Cho Chikun | |
| 47 | 2009 | Cho U | 3–1 | Shinji Takao | |
| 48 | 2010 | 3–0 | Keigo Yamashita | ||
| 2011 | 3–2 | Cho U | |||
| 50 | 2012 | 3–1 | |||
| 51 | 2013 | 3–2 | Yuta Iyama | ||
| 52 | 2014 | 3–2 | Satoshi Yuki | ||
| 53 | 2015 | 3–2 | Shinji Takao | ||
| 54 | 2016 | 3–1 | Atsushi Ida | ||
| 55 | 2017 | 3–1 | Yo Seiki | ||
| 56 | 2018 | 3–0 | Murakawa Daisuke | ||
| 57 | 2019 | Murakawa Daisuke | 3–1 | Yuta Iyama | |
| 58 | 2020 | 3–1 | Murakawa Daisuke | ||
| 59 | 2021 | 3–2 | Toramaru Shibano | ||
| 60 | 2022 | 3–0 | Yo Seiki | ||
| 61 | 2023 | 3–1 | Kyo Kagen | ||
| 62 | 2024 | 3–2 | Toramaru Shibano |