Go Player Ratings

JAAbout ratings

Ishigure Ikuro

Ishigure Ikuro (石榑郁郎) has a rating of 1620, ranked 187 of 452 in professional play. Their highest rating so far is 1681 (September 18, 2025).

Ishigure Ikuro9 dan石榑郁郎Nihon Ki-in Tokyo
Rating1620
Rank187
1-year change↓40
Peak rating1681
Last 10326-318
2026 record
4-5
Record since 1927
326-318
Win rate
.506

The rating is calculated from published game results. It does not include any adjustment for playing Black.

Professional ratingsFind a player

Rating history — professional

13 gamesHigh 1681Low 1595
55 gamesHigh 1681Low 1463
86 gamesHigh 1681Low 1463
264 gamesHigh 1681Low 1463

The “All” view starts at 2006; earlier years are used only to warm up the calculation and are not shown.

Recent games

Up to 20 games, newest first. “Change” is the rating movement.
DateOpponent and tournamentResultChange
August 27, 2026Arimura HiroshiOza　Colors unknown↑14
July 27, 2026Mochizuki KenichiHoninbo　Colors unknown↓9
June 25, 2026Jo BunenHoninbo　Colors unknown↑20
June 11, 2026Izawa AkinoTengen　Colors unknown↓25
March 30, 2026Jo BunenKisei First Tournament Preliminary Quarterfinal　Colors unknown↓18
March 9, 2026So YokokuGosei Preliminary C　as Black↓8
February 16, 2026Awaji ShuzoKisei First Tournament Preliminary Round 2　Colors unknown↑16
January 29, 2026Yoda OzoraJudan　Colors unknown↓19
January 19, 2026Takahashi HideoKisei First Tournament Preliminary Round 1　Colors unknown↑6
December 18, 2025Yoshihara YukariMeijin Preliminary C　as Black↓25
November 6, 2025Suzuki ShinjiOza　Colors unknown↓4
October 23, 2025Terayama ReiHoninbo Preliminary A Final　as Black↓9
September 18, 2025Ohashi HirofumiOza　Colors unknown↑21
September 4, 2025Nakaonoda TomomiHoninbo　Colors unknown↑18
August 21, 2025Shimosaka MioriOza　Colors unknown↑7
August 7, 2025Matsumoto TakehisaTengen　Colors unknown↓6
July 28, 2025Kim SujunRyusei　Colors unknown↓7
July 24, 2025Takeshita RyoyaHoninbo　Colors unknown↑22
July 14, 2025Doi MakotoTengen　Colors unknown↑3
July 7, 2025Obata MinoriRyusei　Colors unknown↑11

Head-to-head

Up to 10 opponents, most-played first. Records are from Ishigure Ikuro's point of view; jigo and no-result games are not counted as wins or losses. Only games from 1927 onward are included.
OpponentTotalAs BlackAs White
Chino Tadahiko5-6.4551-11-5
Kudo Norio4-5.4441-32-2
Kojima Takaho5-4.5562-11-3
Ishida Yoshio3-6.3331-12-5
Kobayashi Koichi3-6.3332-31-2
Kato Masao1-7.1250-21-5
Magari Reiki3-5.3751-51-0
Kuroda Yukio7-1.8753-14-0
Sanno Hirotaka2-6.2502-20-3
Abe Yoshiteru4-4.5002-12-3
Sakai Takeshi3-5.3752-31-1
Ohira Shuzo2-5.2861-41-1
Kataoka Satoshi3-4.4291-32-1
Fujisawa Shuko1-5.1671-00-5
Tei Meiko5-1.8330-00-0
Kurosawa Tadanao3-3.5002-11-2
Hashimoto Utaro3-3.5002-21-1
Rin Kaiho3-3.5001-12-1
Sato Masaharu3-3.5002-01-1
Otake Hideo0-6.0000-30-2
Cho Chikun1-5.1671-30-1
Tanimiya Teiji4-1.8004-00-1
Tozawa Akinobu3-2.6002-11-1
O Rissei1-4.2000-21-1
Fukui Masaaki4-1.8001-00-1
Kodama Kunio3-2.6000-13-1
Takahashi Toshimitsu5-01.0004-01-0

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.

YearRecordWin rate
20264-5.444
202513-10.565
202414-8.636
20233-10.231
20227-7.500
20217-8.467
20207-8.467
201912-6.667
20189-9.500
201711-11.500
20169-12.429
201512-7.632
20143-4.429
20136-4.600
20125-8.385
20119-5.643
20100-2.000
20091-1.500
20065-3.625
20059-10.474
20045-8.385
20034-7.364
20023-7.300
20012-1.667
20001-2.333
19992-1.667
19980-2.000
19953-2.600
19941-01.000
19930-2.000
19920-3.000
19914-3.571
19900-3.000
19892-1.667
19882-1.667
19871-6.143
19866-5.545
19852-3.400
19842-1.667
19831-3.250
19825-5.500
19815-7.417
19803-2.600
19791-2.333
19782-4.333
19773-2.600
19763-2.600
197512-11.522
197411-7.611
19737-9.438
19729-8.529
19715-6.455
197013-10.565
196917-10.630
196812-7.632
196711-7.611
196610-7.588
19653-8.273
19643-1.750
19634-3.571
19610-1.000
Total326-318.506

Calculated from games played between 1927 and 2026 (as of September 17, 2026).