Go Player Ratings

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Ishida Yoshio

Ishida Yoshio (石田芳夫) has a rating of 1507, ranked 259 of 452 in professional play. Their highest rating so far is 1835 (June 8, 2006).

Ishida Yoshio9 dan石田芳夫Nihon Ki-in TokyoAlso known as: 二十四世本因坊秀芳
Rating1507
Rank259
1-year change↓2
Peak rating1835
Last 10948-702(1 lost by default)
2026 record
6-7
Record since 1927
948-702(2 no result)
Win rate
.575

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

Professional ratingsFind a player

Rating history — professional

14 gamesHigh 1522Low 1480
49 gamesHigh 1600Low 1480
89 gamesHigh 1744Low 1480
470 gamesHigh 1835Low 1480

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 17, 2026Mochizuki KenichiTengen　Colors unknown↓5
August 6, 2026Seki RyosukeOza　Colors unknown↓10
July 2, 2026Sugimoto AkiraTengen　Colors unknown↑20
June 25, 2026Izumitani HideoOza　Colors unknown↑20
June 1, 2026Yokotsuka RikiHoninbo　Colors unknown↓1
April 16, 2026Hosaka MayuTengen　Colors unknown↑4
April 2, 2026Yokota HinanoGosei　Colors unknown↓11
March 9, 2026Takekiyo IsamuJudan Preliminary C　as Black↓14
March 2, 2026Takemiya YokoGosei Preliminary C　as White↑17
February 19, 2026Miyatani FugaKisei First Tournament Preliminary Round 2　Colors unknown↓13
February 12, 2026Hirano NorikazuTengen　Colors unknown↑4
February 2, 2026Shibano RyunosukeJudan　Colors unknown↑14
January 26, 2026Koyama TerumiTeikei Cup Legend Round 1　as Black↓11
November 13, 2025Kono TakashiMeijin　Colors unknown↓14
August 28, 2025Kurotaki MasanoriTengen　Colors unknown↓14
July 31, 2025Saga ShuntaroOza　Colors unknown↓16
July 10, 2025Mizokami TomochikaOza　Colors unknown↑28
July 7, 2025Kono TakashiRyusei　Colors unknown↓15
June 19, 2025Terayama ReiHoninbo　Colors unknown↓4
May 29, 2025Chang FukangJudan　Colors unknown↓6

Head-to-head

Up to 10 opponents, most-played first. Records are from Ishida Yoshio'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
Rin Kaiho42-32.56821-1620-16
Takemiya Masaki23-31.42612-1311-16
Otake Hideo24-26.4809-1013-16
Kato Masao11-30.2685-116-19
Fujisawa Shuko17-19.4729-88-11
Cho Chikun14-22.38911-83-13
Kobayashi Koichi19-16.5436-1212-4
Sakata Eio19-15.5598-611-9
Hashimoto Shoji13-19.40611-102-9
Ohira Shuzo10-15.4007-63-9
Kudo Norio14-8.6367-67-2
Yoda Norimoto6-16.2734-31-11
Takagi Shoichi14-7.6678-45-3
Kobayashi Satoru6-14.3002-74-6
Honda Kunihisa11-7.6117-13-6
O Rissei10-8.5568-32-4
Hane Yasumasa11-6.6476-25-4
Kataoka Satoshi12-5.70610-32-2
Yamabe Toshiro7-9.4387-20-7
Hashimoto Utaro11-5.6888-13-4
O Meien4-12.2502-52-3
Miyazawa Goro10-5.6674-15-4
Ryu Shikun4-11.2673-61-3
Yamashiro Hiroshi8-6.5712-26-4
Mimura Tomoyasu4-9.3081-32-3
Kajiwara Takeo9-4.6925-24-2
Sugiuchi Masao6-6.5002-33-3
Chino Tadahiko8-3.7275-12-2
Awaji Shuzo3-8.2731-22-5
Shiraishi Yutaka10-1.9094-06-1
Yamada Takuji6-5.5451-12-2
Ishii Kunio8-3.7273-25-1
Ishida Akira9-2.8186-02-2
Kiyonari Tetsuya5-6.4551-24-3
Kojima Takaho6-4.6003-13-3
Fujisawa Hosai6-4.6003-23-2
Shimamura Toshihiro6-4.6003-33-1
Sonoda Yuichi5-4.5562-23-2
Iwata Tatsuaki6-3.6671-25-1
Oya Koichi6-3.6671-13-2
Kamimura Kunio7-2.7784-13-1
Ishigure Ikuro6-3.6675-21-1
Sakai Takeshi7-2.7782-24-0
Imamura Toshiya8-01.0004-03-0
Hikosaka Naoto6-2.7502-14-1
Takagawa Shukaku4-4.5003-21-2
Kada Katsuji7-1.8754-03-1
Nakaonoda Tomomi5-3.6254-00-1
Akiyama Jiro3-4.4291-11-1
Sato Masaharu7-01.0004-02-0
Kanda Ei6-1.8575-01-0
Mizokami Tomochika5-2.7141-12-1
Kamimura Haruo4-3.5712-20-0
Kato Atsushi2-5.2860-32-1
Komatsu Hideki2-5.2861-21-3
Lee Ishu1-6.1430-30-2
Kubouchi Shuchi6-1.8575-01-1
So Kofuku5-1.8333-11-0
Mochizuki Kenichi0-6.0000-10-0
Magari Reiki4-2.6671-03-2
Iguchi Toyohide4-2.6671-12-0
Yasuda Yasutoshi4-2.6671-02-1
Aoki Shinichi5-1.8331-03-0
Sakakibara Shoji6-01.0003-03-0
So Yokoku3-3.5002-01-1
Oba Junya4-2.6672-10-0
Fukui Masaaki6-01.0002-03-0
Cho Sonjin4-2.6672-12-1
Hashimoto Yujiro4-1.8002-10-0
Hane Naoki1-4.2000-21-2
Oyama Kunio5-01.0005-00-0
Arimura Hiroshi3-2.6001-11-0
Kano Yoshinori5-01.0002-03-0
Ando Kazushige5-01.0002-01-0
Tozawa Akinobu5-01.0002-02-0
Tei Meiko3-01.0001-02-0
Tsuchida Masamitsu4-1.8004-10-0
Uchida Shuhei3-2.6000-02-1
Koyama Terumi2-3.4001-20-1
Kurosawa Tadanao4-1.8001-03-1
Ko Iun4-1.8001-01-1
Terayama Rei0-5.0000-20-1
Ko Mosei4-1.8001-01-1
Ueda Takashi5-01.0001-01-0
Takanashi Seiken3-2.6002-00-2
Sakai Maki4-1.8001-11-0
Kurahashi Masayuki3-2.6000-12-0
Nakamura Hidehito1-4.2001-40-0
Tono Hiroaki3-2.6000-03-2
Rin Kanketsu1-4.2001-10-2
Mitani Tetsuya3-2.6000-02-1
Abe Yoshiteru4-1.8002-02-1
Hoshino Toshi4-1.8002-02-1
Miyashita Shuyo2-3.4002-10-2

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
20266-7.462
20255-11.313
20249-10.474
20238-10.444
202211-10.524
202118-10.643
20207-8.467
201913-10.565
20189-11.450
201716-15.516
201620-11.645
201511-14.440
201412-10.545
201314-12.538
201217-13.567
201120-13.606
201014-9.609
200911-8.579
20089-10.474
20077-7.500
200621-11.656
200512-14.462
200414-12.538
20036-17.261
200214-15.483
20016-10.375
20009-5.643
19997-6.538
19984-7.364
19973-3(2 no result).500
19960-7.000
19958-7.533
199411-12.478
199318-12.600
199225-14.641
199124-14.632
199022-14.611
198928-22.560
198826-9.743
198722-13.629
198618-10.643
19857-14.333
198421-11.656
198317-14.548
198221-13.618
198125-15.625
198026-16.619
197926-27.491
197837-17.685
197724-8.750
197614-24.368
197511-16.407
197428-20.583
197326-10.722
197217-14.548
197133-13.717
197026-8.765
196922-7.759
196821-6.778
19677-3.700
19664-2.667
19640-1.000
Total948-702(2 no result).575

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