Go Player Ratings

JAAbout ratings

Ishii Shinzo

Ishii Shinzo (石井新蔵) has a rating of 1452, ranked 305 of 452 in professional play. Their highest rating so far is 1637 (January 14, 2017).

Ishii Shinzo9 dan石井新蔵Kansai Ki-in
Rating1452
Rank305
1-year change↓38
Peak rating1637
Last 1067-95(1 lost by default)
2026 record
0-2
Record since 1927
67-95(2 no result)
Win rate
.414

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

Professional ratingsFind a player

Rating history — professional

2 gamesHigh 1468Low 1452
5 gamesHigh 1523Low 1452
8 gamesHigh 1527Low 1452
44 gamesHigh 1637Low 1452

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
September 16, 2026Aragaki ShunOza Preliminary B　as Black↓16
January 7, 2026Honda GoroKisei First Tournament Preliminary Round 1　Colors unknown↓22
December 18, 2024Tanaka KentaroKisei First Tournament Preliminary Round 1　Colors unknown↓16
February 28, 2024Hashimoto KanKisei First Tournament Preliminary Round 2　Colors unknown↓16
February 8, 2024Tsukuda AkikoKisei First Tournament Preliminary Round 1　Colors unknown↑13
January 30, 2023Utani ShuntaKisei First Tournament Preliminary Round 2　Colors unknown↓16
December 22, 2022Hotta SeijiKisei First Tournament Preliminary Round 1　Colors unknown↑3
January 26, 2022Nishi TakenobuKisei First Tournament Round 2　as White↓5
January 6, 2021Ida JunyaKisei First Tournament Round 1　as Black↓19
October 15, 2020Yokota ShigeakiKansai Ki-in First Place Tournament Round 1　as Black↓13
November 20, 2019Yahata NaokiKisei First Tournament Preliminary Round 2　Colors unknown↓21
October 31, 2019Chin KaeiKisei First Tournament Preliminary Round 1　Colors unknown↑20
December 12, 2018Ushinohama SatsuoHoninbo Preliminary B　as White↓21
November 8, 2018Yamamori TadanaoKisei First Tournament Preliminary Round 1　Colors unknown↓13
February 22, 2018Chin KaeiKisei First Tournament Preliminary Semifinal　Colors unknown↓14
January 24, 2018Honda KunihisaKansai Ki-in First Place Tournament Round 1　as White↓15
January 12, 2018Kitano RyoKisei First Tournament Preliminary Quarterfinal　Colors unknown↑16
December 13, 2017Konishi KazukoKisei First Tournament Preliminary Round 2　Colors unknown↓23
December 7, 2017Kurahashi ShozoKisei First Tournament Preliminary Round 2　Colors unknown↑9
November 23, 2017Honda GoroKisei First Tournament Preliminary Round 1　Colors unknown↑9

Head-to-head

Up to 10 opponents, most-played first. Records are from Ishii Shinzo'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
Hashimoto Utaro2-3.4002-20-1
Ohira Shuzo1-3.2500-01-3
Shiraishi Yutaka2-2.5000-12-1
Aragaki Shun0-1.0000-10-0
Chin Kaei1-2.3330-00-0
Hane Yasumasa0-3.0000-00-3
Honda Goro2-1.6670-00-0
Kajiwara Takeo0-3.0000-10-2
Yokota Shigeaki1-2.3330-21-0
Ishii Kunio0-3.0000-20-1

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
20260-2.000
20241-2.333
20230-1.000
20221-1.500
20210-1.000
20200-1.000
20191-1.500
20181-4.200
20176-3.667
20164-2.667
20153-01.000
20141-01.000
20120-1.000
20100-1.000
20090-3.000
20080-1.000
20071-1.500
20054-1.800
20041-3.250
20030-2.000
20011-2.333
20000-1.000
19994-3.571
19981-01.000
19950-1.000
19941-1(2 no result).500
19901-2.333
19890-1.000
19881-3.250
19870-2.000
19863-3.500
19851-2.333
19840-2.000
19832-4.333
19824-2.667
19812-5.286
19805-5.500
19792-2.500
19780-3.000
19772-4.333
19765-3.625
19751-3.250
19731-1.500
19701-2.333
19690-1.000
19670-1.000
19652-2.500
19642-2.500
19610-1.000
19601-01.000
Total67-95(2 no result).414

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