Go Player Ratings

JAAbout ratings

Kubo Hideo

Kubo Hideo (久保秀夫) has a rating of 1572, ranked 214 of 452 in professional play. Their highest rating so far is 1722 (June 7, 2012).

Kubo Hideo7 dan久保秀夫Nihon Ki-in Tokyo
Rating1572
Rank214
1-year change±0
Peak rating1722
Last 10216-211
2026 record
8-7
Record since 1927
216-211
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

16 gamesHigh 1580Low 1529
53 gamesHigh 1670Low 1529
101 gamesHigh 1704Low 1529
328 gamesHigh 1722Low 1484

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 3, 2026Kono MitsukiOza　Colors unknown↑22
August 17, 2026Takemiya YokoOza　Colors unknown↑17
August 3, 2026Xie YiminSGW Cup Chuyo Preliminary Round 1　Colors unknown↓8
June 22, 2026Nakamura HidehitoOza　Colors unknown↑12
June 1, 2026Toyoda HirohitoTengen　Colors unknown↓10
May 21, 2026Hashimoto YujiroGosei　Colors unknown↓16
May 11, 2026Hara SachikoOza　Colors unknown↑3
April 27, 2026Ueda TakashiTengen　Colors unknown↑12
April 16, 2026Takanashi SeikenJudan　Colors unknown↓12
April 9, 2026Nobuta ShigehitoGosei　Colors unknown↑3
April 2, 2026Uchida ShuheiHoninbo　Colors unknown↓5
March 19, 2026Hosaka MayuJudan　Colors unknown↑3
March 12, 2026Oya KoichiMeijin　Colors unknown↓19
January 29, 2026Takemiya YokoJudan　Colors unknown↑15
January 22, 2026Kurita YoshikiKisei First Tournament Round 1　as Black↓23
December 18, 2025Kuwabara YokoMeijin　Colors unknown↑8
September 8, 2025Mizokami TomochikaSGW Cup Chuyo Preliminary Round 2　as Black↓6
September 8, 2025Yashiro KumikoSGW Cup Chuyo Preliminary Round 1　as White↑12
September 4, 2025O RisseiOza　Colors unknown↓5
August 11, 2025Suzuki YoshimichiRyusei　Colors unknown↓15

Head-to-head

Up to 10 opponents, most-played first. Records are from Kubo Hideo'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
Suzuki Yoshimichi1-5.1671-00-0
So Yokoku2-3.4000-01-1
Hirata Tomoya2-3.4000-01-0
Yashiro Kumiko4-1.8000-01-0
Hashimoto Yujiro1-3.2500-00-0
Kurotaki Masanori2-2.5000-00-0
Taniguchi Toshinori3-1.7500-00-0
Yamamoto Masato4-01.0000-00-0
Uchida Shuhei0-4.0000-00-0
Kobayashi Kenji3-1.7500-00-0

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
20268-7.533
20259-10.474
20249-9.500
20237-10.412
202216-14.533
202113-10.565
20208-12.400
201919-9.679
201811-11.500
201712-13.480
20167-10.412
20158-10.444
20144-4.500
20133-6.333
20129-10.474
20119-7.563
20101-3.250
20091-1.500
20081-2.333
20072-2.500
20068-6.571
200512-11.522
200419-11.633
20038-10.444
200211-7.611
20010-3.000
19990-1.000
19980-1.000
19971-01.000
19950-1.000
Total216-211.506

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