Kobayashi Izumi
Kobayashi Izumi (小林泉美) has a rating of 1621, ranked 185 of 452 in professional play. Their highest rating so far is 1670 (March 4, 2024).
- 2026 record
- 15-12
- Record since 1927
- 173-179
- Win rate
- .491
The rating is calculated from published game results. It does not include any adjustment for playing Black.
Professional ratingsFind a player
Rating history — professional
The “All” view starts at 2006; earlier years are used only to warm up the calculation and are not shown.
Rating history in the women's tournaments pool (for reference)
The “All” view starts at 2006; earlier years are used only to warm up the calculation and are not shown.
Ratings in other pools
Ratings for general play and for women's tournaments are calculated independently and do not affect each other.
- Women's tournaments: 1698 (#16)
Recent games
| Date | Opponent and tournament | Result | Change |
|---|---|---|---|
| September 7, 2026 | Kanazawa HideoOza Preliminary B as White | Loss | ↓12 |
| August 27, 2026 | Yokota HinanoWomen's Kisei Colors unknown | Loss | ↓20 |
| August 24, 2026 | Miyamoto ChiharuWomen's Kisei Colors unknown | Win | ↑3 |
| August 10, 2026 | Sugimoto AkiraSGW Cup Chuyo Preliminary Round 1 Colors unknown | Loss | ↓20 |
| July 30, 2026 | Takekiyo IsamuOza Colors unknown | Win | ↑14 |
| July 23, 2026 | Cho ChikunGosei Colors unknown | Loss | ↓8 |
| July 2, 2026 | Ko IsoTengen Colors unknown | Loss | ↓3 |
| June 4, 2026 | Hino ShotaTengen Colors unknown | Win | ↑12 |
| May 25, 2026 | Awaji ShuzoGosei Colors unknown | Win | ↑18 |
| May 23, 2026 | Cho ChikunTeikei Cup Legend Final as White | Loss | ↓7 |
| May 14, 2026 | Kubo KatsuakiTeikei Cup Legend Round 3 as White | Win | ↑19 |
| April 29, 2026 | Nyu EikoFumakilla Women's Go Brains Match Round 1 as White | Loss | ↓8 |
| April 27, 2026 | Obata MinoriTengen Colors unknown | Win | ↑10 |
| April 20, 2026 | Cho SonjinGosei Colors unknown | Win | ↑20 |
| April 13, 2026 | Kobayashi SatoruTeikei Cup Legend Round 2 as White | Win | ↑23 |
| April 6, 2026 | Mizuma ToshifumiHoninbo Colors unknown | Loss | ↓21 |
| March 30, 2026 | Ando KazushigeKisei First Tournament Preliminary Quarterfinal Colors unknown | Loss | ↓16 |
| March 19, 2026 | Shibusawa MachikoGosei Colors unknown | Win | ↑1 |
| March 12, 2026 | Goto ManaTengen Colors unknown | Win | ↑6 |
| March 9, 2026 | Yashiro KumikoWomen's Honinbo Preliminary Final as White | Loss | ↓20 |
Head-to-head
| Opponent | Total | As Black | As White |
|---|---|---|---|
| Chinen Kaori | 10-16.385 | 4-8 | 5-8 |
| Aoki Kikuyo | 12-6.667 | 6-3 | 4-2 |
| Kato Keiko | 8-10.444 | 2-3 | 3-2 |
| Yashiro Kumiko | 7-8.467 | 2-0 | 3-4 |
| Osawa Narumi | 6-8.429 | 1-2 | 1-1 |
| Inori Yoko | 9-4.692 | 4-0 | 5-2 |
| Mannami Kana | 6-6.500 | 2-2 | 1-1 |
| Umezawa Yukari | 6-6.500 | 4-2 | 1-2 |
| Koyama Terumi | 5-6.455 | 0-3 | 4-0 |
| Xie Yimin | 3-8.273 | 1-3 | 1-4 |
| Nakazawa Ayako | 7-3.700 | 1-1 | 2-1 |
| Komatsu Hideko | 7-3.700 | 2-1 | 1-1 |
| Kato Tomoko | 7-3.700 | 2-3 | 2-0 |
| Nagashima Kozue | 7-2.778 | 1-0 | 1-0 |
| Sugiuchi Kazuko | 6-3.667 | 4-0 | 1-3 |
| Mukai Chiaki | 3-6.333 | 2-2 | 0-2 |
| Yoshida Mika | 4-4.500 | 4-2 | 0-1 |
| Kobayashi Chizu | 7-1.875 | 2-0 | 2-0 |
| Izawa Akino | 4-3.571 | 1-1 | 1-0 |
| Yokota Hinano | 4-2.667 | 0-0 | 1-0 |
| Ko Iun | 4-2.667 | 0-0 | 0-0 |
| Kusunoki Teruko | 6-01.000 | 2-0 | 1-0 |
| Konishi Kazuko | 4-2.667 | 0-1 | 4-1 |
| Nakajima Mieko | 6-01.000 | 0-0 | 2-0 |
| Mimura Kaori | 2-3.400 | 0-0 | 2-0 |
| Sato Fumitoshi | 5-01.000 | 0-0 | 1-0 |
| Nyu Eiko | 2-3.400 | 1-0 | 1-2 |
| Hosaka Mayu | 5-01.000 | 2-0 | 0-0 |
| Suzuki Ayumi | 3-2.600 | 2-0 | 1-2 |
| Shibusawa Machiko | 5-01.000 | 0-0 | 0-0 |
| Cho Sonjin | 3-2.600 | 1-0 | 0-0 |
| Cho Chikun | 0-5.000 | 0-1 | 0-2 |
| Nakaonoda Tomomi | 2-3.400 | 2-0 | 0-0 |
Record by year
Counted by calendar year, January to December (default wins and losses are included; jigo and no-result games are not). Only games from 1927 onward are counted, so these totals do not match the career records published by the two Ki-in.
| Year | Record | Win rate |
|---|---|---|
| 2026 | 15-12 | .556 |
| 2025 | 22-17 | .564 |
| 2024 | 20-16 | .556 |
| 2023 | 21-19 | .525 |
| 2022 | 23-14 | .622 |
| 2021 | 14-13 | .518 |
| 2020 | 8-14 | .364 |
| 2019 | 14-15 | .483 |
| 2018 | 23-17 | .575 |
| 2017 | 11-14 | .440 |
| 2016 | 7-5 | .583 |
| 2015 | 7-6 | .538 |
| 2014 | 4-1 | .800 |
| 2011 | 2-3 | .400 |
| 2010 | 2-2 | .500 |
| 2009 | 9-3 | .750 |
| 2008 | 4-10 | .286 |
| 2007 | 15-4 | .789 |
| 2006 | 6-7 | .462 |
| 2005 | 25-23 | .521 |
| 2004 | 19-19 | .500 |
| 2003 | 25-19 | .568 |
| 2002 | 21-16 | .568 |
| 2001 | 7-7 | .500 |
| 2000 | 7-10 | .412 |
| 1999 | 15-13 | .536 |
| 1998 | 9-8 | .529 |
| 1997 | 7-4 | .636 |
| 1996 | 3-1 | .750 |
| 1995 | 1-0 | 1.000 |
| Total | 173-179 | .491 |
Calculated from games played between 1927 and 2026 (as of September 17, 2026).