The 45th Judan was held from May 11, 2006 to April 25, 2007. The current sponsor is Sankei Newspapers. The holder is Cho Chikun, and the challenger is Keigo Yamashita for the second time in a row. Hideki Komatsu, Norimoto Yoda, Kimio Yamada, Hideo Otake, Koichi Kobayashi, Kim Shushun, Naoki Hane, and Takeshi Sakai qualified through preliminary tournaments. The rest of the players were given spots automatically.
Preliminaries
| Semifinals | | | Finals | |
| | | | | | | | | |
| Shigeaki Yokota 9 dan | 0 | | |
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| Hideki Komatsu 9 dan | 1 | |
| | Hideki Komatsu 9 dan | 1 | |
| | |
| | | Yoshio Ishida 9 dan | 0 | |
| Yoshio Ishida 9 dan | 1 | |
| |
| Toshiya Imamura 9 dan | 0 | |
| Semifinals | | | Finals | |
| | | | | | | | | |
| Norimoto Yoda Gosei | 1 | | |
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| Hideyuki Sakai 7 dan | 0 | |
| | Norimoto Yoda Gosei | 1 | |
| | |
| | | Kenichi Mochizuki 6 dan | 0 | |
| Shinichi Aoki 9 dan | 0 | |
| |
| Kenichi Mochizuki 6 dan | 1 | |
| Semifinals | | | Finals | |
| | | | | | | | | |
| Yo Kaei 8 dan | 0 | | |
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| Kimio Yamada 9 dan | 1 | |
| | Kimio Yamada 9 dan | 1 | |
| | |
| | | Rin Kono Tengen | 0 | |
| Rin Kono Tengen | 1 | |
| |
| Kunihisa Honda 9 dan | 0 | |
| Semifinals | | | Finals | |
| | | | | | | | | |
| Noriyoshi Yamada 9 dan | 0 | | |
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| Kana Mannami 3 dan ♀ | 1 | |
| | Kana Mannami 3 dan | 0 | |
| | |
| | | Hideo Otake Honorary Gosei | 1 | |
| Ryu Shikun 9 dan | 0 | |
| |
| Hideo Otake Honorary Gosei | 1 | |
| Semifinals | | | Finals | |
| | | | | | | | | |
| Koichi Kobayashi Honorary Kisei | 1 | | |
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| Naoto Hikosaka 9 dan | 0 | |
| | Koichi Kobayashi Honorary Kisei | 0 | |
| | |
| | | Shinya Nakamura 8 dan | 1 | |
| Shinya Nakamura 8 dan | 1 | |
| |
| Katsunori Yanaka 8 dan | 0 | |
| Semifinals | | | Finals | |
| | | | | | | | | |
| Kim Shushun 7 dan | 1 | | |
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| Mitsuhisa Yukawa 9 dan | 0 | |
| | Kim Shushun 7 dan | 1 | |
| | |
| | | Michael Redmond 9 dan | 0 | |
| Masaki Ogata 9 dan | 0 | |
| |
| Michael Redmond 9 dan | 1 | |
| Semifinals | | | Finals | |
| | | | | | | | | |
| Masayuki Kurahashi 9 dan | 0 | | |
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| Maki Sakai 8 dan | 1 | |
| | Maki Sakai 8 dan | 0 | |
| | |
| | | Naoki Hane 9 dan | 1 | |
| Naoki Hane 9 dan | 0 | |
| |
| Cho Sonjin 9 dan | 1 | |
| Semifinals | | | Finals | |
| | | | | | | | | |
| Rin Kaiho Honorary Tengen | 1 | | |
|
| Satoshi Kataoka 9 dan | 0 | |
| | Rin Kaiho Honorary Tengen | 0 | |
| | |
| | | Takeshi Sakai 9 dan | 1 | |
| Nakano Hironari 9 dan | 0 | |
| |
| Takeshi Sakai 9 dan | 1 | |
Main tournament
Winners section
| Round of 16 | | Quarter-finals | | Semi-finals | | Final |
| | | | | | | | | | | | | | |
| | | | | | | | | |
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| Satoru Kobayashi 9 dan | 1 |
| |
| So Yokoku 8 dan | 0 | |
| Satoru Kobayashi 9 dan | 1 |
| |
| | Kim Shushun 7 dan | 0 | |
| Hiroshi Yamashiro 9 dan | 0 |
| | |
| Kim Shushun 7 dan | 1 | |
| Satoru Kobayashi 9 dan | 0 |
| |
| | Keigo Yamashita Kisei | 1 | |
| Takeshi Sakai 9 dan | 0 |
| | |
| Norimoto Yoda 9 dan | 1 | |
| Norimoto Yoda 9 dan | 0 |
| |
| | Keigo Yamashita Kisei | 1 | |
| Koichi Kobayashi Honorary Kisei | 0 |
| | |
| Keigo Yamashita Kisei | 1 | |
| Keigo Yamashita Kisei | 1 |
| |
| | Cho U Gosei | 0 |
| Cho U Gosei | 1 |
| | |
| Shinji Takao Meijin | 0 | |
| Cho U Gosei | 1 |
| |
| | Hideki Komatsu 9 dan | 0 | |
| Hideo Otake Honorary Gosei | 0 |
| | |
| Hideki Komatsu 9 dan | 1 | |
| Cho U Gosei | 1 |
| |
| | Kimio Yamada 9 dan | 0 | |
| Kimio Yamada 9 dan | 1 |
| | |
| Tomoyasu Mimura 9 dan | 0 | |
| Kimio Yamada 9 dan | 1 |
| |
| | O Rissei 9 dan | 0 | |
| Naoki Hane 9 dan | 0 |
| |
| O Rissei 9 dan | 1 | |
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Losers section
Challenger finals
Finals
External links