The 31st Kisei is a go tournament held from May 2006 to March 22, 2007. The following players earned spots through not being eliminated in the group stage: Satoshi Yuki (5-0), Tomoyasu Mimura (3-2), Kato Atsushi (3-2), Kobayashi Satoru (3-2), Komatsu Hideki (3-2), Norimoto Yoda (2-3), and O Rissei (2-3). Cho U, Kunihisa Honda, O Meien, and Toshiya Imamura were eliminated from group play and had to earn a spot through preliminary stages. The players to have qualified through preliminary tournaments are Cho U, Kunihisa Honda, Cho Chikun, and Toshiya Imamura. Naoki Hane, the loser of the 30th Kisei takes the place of holder Keigo Yamashita in the group stage. Players who end with the two lowest records in the each league are eliminated from automatic berth into the next tournament while the 3 other players who were not eliminated or had the top record are given a place in the following years groups.
Keigo Yamashita swept his opponent for the second time in as many years.
Preliminaries
editGroup A
edit| Quarter-finals | Semi-finals | Final | ||||||||
| Tetsuya Kiyonari 9 dan | 0 | |||||||||
| Yuta Iyama 7 dan | 1 | |||||||||
| Yuta Iyama 7 dan | 1 | |||||||||
| Kimio Yamada 9 dan | 0 | |||||||||
| Kimio Yamada 9 dan | 1 | |||||||||
| Susumu Fukui 9 dan | 0 | |||||||||
| Yuta Iyama 7 dan | 0 | |||||||||
| Cho U Meijin | 1 | |||||||||
| Tetsuya Mitani 3 dan | 0 | |||||||||
| Yoshio Ueki 8 dan | 1 | |||||||||
| Yoshio Ueki 8 dan | 0 | |||||||||
| Cho U Meijin | 1 | |||||||||
| Hikosaka Naoto 9 dan | 0 | |||||||||
| Cho U Meijin | 1 | |||||||||
Group B
edit| Quarter-finals | Semi-finals | Final | ||||||||
| Hideki Matsuoka 8 dan | 0 | |||||||||
| Hideyuki Sakai 7 dan | 1 | |||||||||
| Hideyuki Sakai 7 dan | 0 | |||||||||
| Masaharu Sato 9 dan | 1 | |||||||||
| Takuji Yamada 7 dan | 0 | |||||||||
| Masaharu Sato 9 dan | 1 | |||||||||
| Masaharu Sato 9 dan | 0 | |||||||||
| Kunihisa Honda 9 dan | 1 | |||||||||
| Katsunori Yanaka 8 dan | 0 | |||||||||
| Yasumasa Hane 9 dan | 1 | |||||||||
| Yasumasa Hane 9 dan | 0 | |||||||||
| Kunihisa Honda 9 dan | 1 | |||||||||
| Shuzo Awaji 9 dan | 0 | |||||||||
| Kunihisa Honda 9 dan | 1 | |||||||||
Group C
edit| Quarter-finals | Semi-finals | Final | ||||||||
| Michihiro Morita 9 dan | 1 | |||||||||
| Shinichi Aoki 9 dan | 0 | |||||||||
| Michihiro Morita 9 dan | 1 | |||||||||
| Norio Kudo 9 dan | 0 | |||||||||
| Taiki Seto 6 dan | 0 | |||||||||
| Norio Kudo 9 dan | 1 | |||||||||
| Michihiro Morita 9 dan | 0 | |||||||||
| Cho Chikun Judan | 1 | |||||||||
| Masaki Hoshino 8 dan | 1 | |||||||||
| Masaki Takemiya 9 dan | 0 | |||||||||
| Masaki Hoshino 8 dan | 0 | |||||||||
| Cho Chikun Judan | 1 | |||||||||
| Cho Chikun Judan | 1 | |||||||||
| O Meien 9 dan | 0 | |||||||||
Group D
edit| Quarter-finals | Semi-finals | Final | ||||||||
| Hiroshi Yamashiro 9 dan | 0 | |||||||||
| Yoshiaki Imamura 8 dan | 1 | |||||||||
| Yoshiaki Imamura 8 dan | 1 | |||||||||
| Hideki Takano 6 dan | 0 | |||||||||
| Ei Kandei 9 dan | 0 | |||||||||
| Hideki Takano 6 dan | 1 | |||||||||
| Yoshiaki Imamura 8 dan | 0 | |||||||||
| Toshiya Imamura 9 dan | 1 | |||||||||
| Kim Shushun 7 dan | 0 | |||||||||
| Tomochika Mizokami 8 dan | 1 | |||||||||
| Tomochika Mizokami 8 dan | 0 | |||||||||
| Toshiya Imamura 9 dan | 1 | |||||||||
| Hiroyuki Hiroe 9 dan | 0 | |||||||||
| Toshiya Imamura 9 dan | 1 | |||||||||
Main tournament
editGroup A
edit| Player | N.H. | T.M. | K.H. | N.Y. | C.U. | H.K. | T |
|---|---|---|---|---|---|---|---|
| Naoki Hane 9 dan | X | W+R | W+0.5 | L+R | W+R | W+R | 4-1* |
| Mimura Tomoyasu 9 dan | L+R | X | L+R | W+2.5 | L+R | L+5.5 | 1-4 |
| Hideki Komatsu 9 dan | L+0.5 | W+R | X | W+2.5 | L+R | L+R | 2-3 |
| Norimoto Yoda 9 dan | W+R | L+2.5 | L+2.5 | X | L+1.5 | W+R | 2-3 |
| Cho U Gosei | L+R | W+R | W+R | W+1.5 | X | W+R | 4-1 |
| Kunihisa Honda 9 dan | L+R | W+5.5 | W+R | L+R | L+R | X | 2-3** |
* Naoki Hane held the tiebreaker over Cho U.
** Hideki Komatsu and Norimoto Yoda held tiebreakers over Kunihisa Honda.
Group B
edit| Player | S.Y. | S.K. | K.A. | O.R. | C.C. | T.I. | T |
|---|---|---|---|---|---|---|---|
| Satoshi Yuki 9 dan | X | L+R | L+2.5 | L+0.5 | W+R | L+R | 1-4 |
| Satoru Kobayashi 9 dan | W+R | X | L+R | W+R | W+R | W+0.5 | 4-1*** |
| Atsushi Kato 8 dan | W+2.5 | W+R | X | W+3.5 | L+8.5 | W+5.5 | 4-1 |
| O Rissei 9 dan | W+0.5 | L+R | L+3.5 | X | W+R | W+13.5 | 3-2 |
| Cho Chikun Judan | L+R | L+R | W+8.5 | L+R | X | L+R | 1-4 |
| Toshiya Imamura 9 dan | W+R | L+0.5 | L+5.5 | L+13.5 | W+R | X | 2-3 |
*** Satoru Kobayashi held the tiebreaker over Atsushi Kato.
Key:
- Green - Winner of group; earns a spot in the challenger final.
- Blue - Earns a place in the next edition's group stage.
- Red - Eliminated from automatic berth; must qualify through preliminary stages.
Challenger finals
edit| Final | ||||
| Naoki Hane 9 dan | 0 | |||
| Satoru Kobayashi 9 dan | 1 | |||
Finals
edit Player
|
1
(Hokkaidō) |
2
(Wakayama) |
3
(Fukushima) |
4
(Toyama) |
5
(Aichi) |
6
(Sunto) |
7
(Nagasaki) |
T
|
|---|---|---|---|---|---|---|---|---|
| Keigo Yamashita (Kisei) | B+R | W+R | B+R | W+R | 4 | |||
| Kobayashi Satoru (Challenger) | 0 |
Key
- W+ - Won by
- R - Resignation