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Kubo Katsuaki

Kubo Katsuaki (久保勝昭) has a rating of 1666, ranked 155 of 452 in professional play. Their highest rating so far is 1748 (May 26, 2022).

Kubo Katsuaki9 dan久保勝昭Kansai Ki-in
Rating1666
Rank155
1-year change↑14
Peak rating1748
Last 1072-101
2026 record
5-2
Record since 1927
72-101
Win rate
.416

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

Professional ratingsFind a player

Rating history — professional

9 gamesHigh 1683Low 1653
17 gamesHigh 1689Low 1652
32 gamesHigh 1748Low 1652
94 gamesHigh 1748Low 1538

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 14, 2026Fujisawa NanamiOza Preliminary B　as White↑9
September 2, 2026Maeda RyoTengen Preliminary B　as Black↑4
May 14, 2026Kobayashi IzumiTeikei Cup Legend Round 3　as Black↓19
March 12, 2026Koyama TerumiTeikei Cup Legend Round 2　as Black↑14
February 11, 2026Aragaki ShunKisei First Tournament Preliminary Round 2　Colors unknown↓25
February 5, 2026Nakamura HidehitoTeikei Cup Legend Round 1　as White↑9
January 22, 2026Terada ShutaKisei First Tournament Preliminary Round 1　Colors unknown↑12
December 17, 2025Sakai KentaroTengen Preliminary A　as Black↓19
September 24, 2025Sada AtsushiTengen Preliminary A　as Black↑29
June 26, 2025Kiyonari TetsuyaJudan Preliminary A　as White↓12
December 19, 2024Ikemoto RyotaKisei First Tournament Preliminary Round 1　Colors unknown↓13
September 9, 2024福原勘左卫门Kansai Ki-in First Place Tournament Preliminary　as White↑5
September 9, 2024Fujita ReoKansai Ki-in First Place Tournament Preliminary　as White↑9
April 11, 2024Nishioka MasaoKisei First Tournament Round 4　as White↓17
March 20, 2024Nishi TakenobuKansai Ki-in First Place Tournament Round 1　as Black↓8
March 13, 2024Ono AyakoKisei First Tournament Round 3　as Black↑8
February 22, 2024Ikawa RyougoKisei First Tournament Preliminary Round 2　Colors unknown↑6
May 17, 2023Yata NaokiJudan Preliminary A　as White↓20
April 26, 2023Kumaki TeruyaKisei First Tournament Round 5　as Black↓24
March 30, 2023Chang Ruei JieRyusei Round 8　as Black↓9

Head-to-head

Up to 10 opponents, most-played first. Records are from Kubo Katsuaki'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
Murakawa Daisuke0-4.0000-30-1
Kato Masao1-2.3331-10-1
Imamura Toshiya0-3.0000-10-2
Taniguchi Toru3-01.0003-00-0
Furuya Yutaka2-1.6670-01-0
Shiraishi Yutaka1-2.3331-10-1
Yukawa Mitsuhisa1-2.3330-21-0
Kobayashi Satoru1-2.3331-00-1
Sakai Hideyuki1-2.3331-10-1
Nishi Takenobu2-1.6671-11-0

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
20265-2.714
20251-2.333
20244-3.571
20233-4.429
20221-6.143
20219-3.750
20201-4.200
20193-01.000
20181-3.250
20174-9.308
20165-2.714
20153-3.500
20140-1.000
20132-2.500
20121-01.000
20111-1.500
20090-1.000
20080-3.000
20060-1.000
20050-2.000
20044-5.444
20031-6.143
20023-4.429
20018-3.727
20000-2.000
19990-1.000
19950-1.000
19940-1.000
19931-2.333
19920-2.000
19911-2.333
19901-3.250
19890-2.000
19880-1.000
19860-3.000
19852-2.500
19841-1.500
19831-3.250
19820-1.000
19810-2.000
19802-01.000
19791-1.500
19781-1.500
19761-01.000
Total72-101.416

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