68th Honinbo-sen
Host Organization: Mainichi Shimbun
Title match
| Players | 1st round 05-16,17 Ota Shimane |
2nd round 05-28,29 Kitakyushu Fukuoka |
3rd round 06-05,06 Kushiro Hokkaido |
4th round 06-17,18 Shiraishi Miyagi |
5th round 06-24,25 Suita Osaka |
6th round 07-10,11 Toba Mie |
7th round 07-17,18 Hadano Kanagawa |
|---|---|---|---|---|---|---|---|
| Iyama Yuta (Honinbo) | W+4.5 | B+R | W+R | B+4.5 | |||
| Takao Shinji (9 dan) | W+R | B+R | W+R |
Iyama Yuta kept the title by 4-3.
The win-loss records; Iyama Yuta 17-5 Takao Shinji.
The win-loss records; Iyama Yuta 17-5 Takao Shinji.
League
| Rank | Players | Y.K | Y.S | C.U | T.S | C.S | I.T | K.I | S.T | Result | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Yamashita Keigo(M) | - | B+R 11-22 |
W+R 04-08 |
X 02-21 |
W+0.5 10-25 |
X 03-21 |
W+R 01-10 |
B+R 12-20 |
5-2 | 2 |
| 2 | Yuki Satoshi(9d) | X 11-22 |
- | X 11-15 |
X 01-24 |
X 03-21 |
W+R 10-04 |
B+R 02-21 |
W+R 04-08 |
3-4 | 4 |
| 3 | Cho U(9d) | X 04-08 |
W+R 11-15 |
- | X 03-27 |
W+R 01-10 |
B+R 02-11 |
W+R 10-11 |
B+R 11-08 |
5-2 | 3 |
| 4 | Takao Shinji(9d) | W+R 02-21 |
B+R 01-24 |
W+R 03-27 |
- | B+R 11-29 |
W+R 04-08 |
B+R 11-01 |
W+1.5 10-11 |
7-0 | C |
| 5 | Cho Sonjin(9d) | X 10-25 |
W+R 03-21 |
X 01-10 |
X 11-29 |
- | X 11-01 |
X 04-08 |
X 02-14 |
1-6 | DM |
| 5 | Imamura Toshiya(9d) | W+0.5 03-21 |
X 10-04 |
X 02-11 |
X 04-08 |
W+R 11-01 |
- | X 12-06 |
X 01-24 |
2-5 | DM |
| 5 | Ko Iso(8d) | X 01-10 |
X 02-21 |
X 10-11 |
X 11-01 |
B+R 04-08 |
W+4.5 12-06 |
- | B+R 03-07 |
3-4 | DM |
| 5 | Seto Taiki(7d) | X 12-20 |
X 04-08 |
X 11-08 |
X 10-11 |
W+0.5 02-14 |
B+R 01-24 |
X 03-07 |
- | 2-5 | DM |
League scene
| title | Player1(upper);winner Player2(lower);loser B|W+x.x|R ;result xx-xx ;date |
1 Y.K |
2 Y.S |
3 C.U |
4 T.S |
5 C.S |
5 I.T |
5 K.I |
5 S.T | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Round 1 (Oct.) |
Y.S I.T W+R 10-04 |
C.U K.I W+R 10-11 |
T.S S.T W+1.5 10-11 |
Y.K C.S W+0.5 10-25 |
1-0 | 1-0 | 1-0 | 1-0 | 0-1 | 0-1 | 0-1 | 0-1 |
| Round 2 (Nov.) |
T.S K.I B+R 11-01 |
I.T C.S W+R 11-01 |
C.U S.T B+R 11-08 |
Y.K Y.S W+R 11-22 |
2-0 | 1-1 | 2-0 | 1-1 | 0-2 | 1-1 | 0-2 | 0-2 |
| Round 3 (Dec.) |
C.U Y.S W+R 11-15 |
T.S C.S B+R 11-29 |
K.I I.T W+4.5 12-06 |
Y.K S.T B+R 12-20 |
3-0 | 1-2 | 3-0 | 3-0 | 0-3 | 1-2 | 1-2 | 0-3 |
| Round 4 (Jan.) |
Y.K K.I W+R 01-10 |
C.U C.S W+R 01-10 |
T.S Y.S B+R 01-24 |
S.T I.T B+R 01-24 |
4-0 | 1-3 | 4-0 | 4-0 | 0-4 | 1-3 | 1-3 | 1-3 |
| Round 5 (Feb.) |
C.U I.T B+R 02-11 |
S.T C.S W+0.5 02-14 |
T.S Y.K W+R 02-21 |
Y.S K.I B+R 02-21 |
4-1 | 2-3 | 5-0 | 5-0 | 0-5 | 1-4 | 1-4 | 2-3 |
| Round 6 (Mar.) |
K.I S.T B+R 03-07 |
I.T Y.K W+0.5 03-21 |
C.S Y.S W+R 03-21 |
T.S C.U W+R 03-27 |
4-2 | 2-4 | 5-1 | 6-0 | 1-5 | 2-4 | 2-4 | 2-4 |
| Round 7 (Apr.) |
Y.K C.U W+R 04-08 |
Y.S S.T W+R 04-08 |
T.S I.T W+R 04-08 |
K.I C.S B+R 04-08 |
5-2 | 3-4 | 5-2 | 7-0 | 1-6 | 2-5 | 3-4 | 2-5 |
| Result | 2 | 4 | 3 | C | DM | DM | DM | DM | ||||
| Age | at 2012-09-30 | 34 | 40 | 32 | 35 | 42 | 46 | 25 | 28 | |||
| Registered | Honinbo and league(years) | 8 | 7 | 12 | 8 | 13 | 2 | 2 | 3 | |||
| Win-Loss | 2012-09-30(win-loss) | 19-17 | 22-20 | 22-19 | 24-17 | 15-08 | 19-08 | 14-12 | 28-18 | |||
| Percentage | 2012-09-30(%) | 53 | 52 | 54 | 59 | 65 | 70 | 54 | 61 | |||
| Ranking | 2012-09-30 | 17 | 7 | 7 | 6 | - | 17 | - | 2 | |||
Note (M); Meijin History; 2012-08-31 Page was created. 2012-09-28 Updated. 2012-10-05,12,19,26 Updated. 2012-11-03,09,16,23,30 Updated. 2012-12-08,15,21 Updated. 2013-01-04,12,19,26 Updated. 2013-02-10,17,23 Updated. 2013-03-03,09,16,22,29 Updated. 2013-04-06,08 Updated. 2013-05-17,30 Updated. 2013-06-06,18,25 Updated. 2013-07-11,18 Updated.
The last preliminary tournament
| Players | 1st round | Semifinals | Final | |
|---|---|---|---|---|
| Awaji Shuzo(9d) | Imamura T B+0.5 07-12 |
Imamura T W+R 08-02 |
Imamura T W+R 08-23 | |
| Imamura Toshiya(9d) | ||||
| Yamada Kimio(9d) | Yamada K W+0.5 05-31 |
Yamada K W+R 06-28 | ||
| Kato Atsushi(9d) | ||||
| Sakai Hideyuki(8d) | ||||
| Kobayashi Koichi(9d) | Nakamura S W+R 06-28 |
Yamada T W+3.5 08-02 | ||
| Nakamura Shinya(9d) | Nakamura S B+R 05-24 | |||
| Sasaka Shiro(8d) | ||||
| Yamada Takuji(8d) | Yamada T B+R 06-14 | |||
| Kono Rin(9d) | ||||
| Cho Sonjin(9d) | Cho Sonjin B+0.5 07-12 |
Cho Sonjin B+R 08-02 |
Cho Sonjin W+14.5 08-30 | |
| Iwamaru Taira(6d) | ||||
| Mizokami Tomochika(8d) | Mizokami T B+R 06-21 |
Fujii S B+0.5 07-12 | ||
| Morita Michihiro(9d) | ||||
| Fujii Shuya(7d) | ||||
| Imamura Yoshiaki(9d) | Imamura Y B+R 06-21 |
Imamura Y B+3.5 08-09 | ||
| Shida Tatsuya(5d) | ||||
| Kubo Hideo(6d) | Kubo H B+R 06-07 | |||
| Hane Naoki(9d) | ||||
| Aoki Shinichi(9d) | Aoki S B+R 05-31 |
Nakano H B+R 08-16 |
Ko Iso B+R 08-30 | |
| Yokota Shigeaki(9d) | ||||
| Rin Shien(7d) | Nakano H B+R 06-14 |
Nakano H B+R 07-05 | ||
| Nakano Hironari(9d) | ||||
| Tajiri Yuto(3d) | ||||
| Oba Junya(6d) | Oba J W+R 06-14 |
Ko Iso B+1.5 08-02 | ||
| Shimojima Yohei(7d) | ||||
| Tsuruyama Atsushi(7d) | Ko Iso W+R 06-07 | |||
| Ko Iso(8d) | ||||
| Muramatsu Hiroki(2d) | Shuto S B+R 06-14 |
Shuto S B+R 08-02 |
Seto T B+R 08-30 | |
| Shuto Shun(7d) | ||||
| Kono Takashi(8d) | Yoda N B+R 06-07 |
Ryu Shikun W+1.5 06-28 | ||
| Yoda Norimoto(9d) | ||||
| Ryu Shikun(9d) | ||||
| Michael Redmond(9d) | Murakawa D W+R 06-21 |
Seto T W+R 08-09 | ||
| Murakawa Daisuke(7d) | ||||
| O Rissei(9d) | Seto T B+R 06-21 | |||
| Seto Taiki(7d) | ||||
History; 2012-05-27 Page was created. 2012-06-02,08,15,22 Updated. 2012-07-01,07,14,28 Updated. 2012-08-03,11,17,24,31 Updated.