Go Player Ratings

JAAbout ratings

Omori Yasushi

Omori Yasushi (大森泰志) has a rating of 1499, ranked 267 of 452 in professional play. Their highest rating so far is 1757 (September 14, 2020).

Omori Yasushi9 dan大森泰志Nihon Ki-in Tokyo
Rating1499
Rank267
1-year change↓40
Peak rating1757
Last 10204-217
2026 record
4-8
Record since 1927
204-217
Win rate
.485

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 1560Low 1499
49 gamesHigh 1585Low 1499
86 gamesHigh 1661Low 1499
315 gamesHigh 1757Low 1499

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 10, 2026Ishida AtsushiSGW Cup Chuyo Preliminary　as White↓12
June 11, 2026Akiyama JiroHoninbo　Colors unknown↓3
June 4, 2026Miyazawa GoroTengen　Colors unknown↓11
May 11, 2026Osawa NarumiOza　Colors unknown↓20
April 20, 2026Suzuki IsaoHoninbo　Colors unknown↑11
April 16, 2026Kanda EiTengen　Colors unknown↑15
March 30, 2026Shibano RyunosukeGosei　Colors unknown↓20
March 12, 2026Tanimiya AyakoTengen　Colors unknown↑1
February 26, 2026Ito MasashiJudan　Colors unknown↓9
February 19, 2026Toyoda HirohitoKisei First Tournament Preliminary Round 2　Colors unknown↓11
January 29, 2026Yamada ShinjiJudan　Colors unknown↑17
January 15, 2026Koike YoshihiroMeijin　Colors unknown↓1
November 20, 2025Nakazawa AyakoMeijin　Colors unknown↑6
September 11, 2025Kim SujunSGW Cup Chuyo Preliminary Round 2　as White↓4
September 11, 2025Suzuki AyumiSGW Cup Chuyo Preliminary Round 1　as Black↑25
September 4, 2025Takeuchi KosukeOza　Colors unknown↓5
July 14, 2025Chen BoshaoRyusei　Colors unknown↓14
June 30, 2025Kataoka SatoshiTengen　Colors unknown↓8
June 19, 2025Mitsunaga JunzoHoninbo　Colors unknown↓15
May 15, 2025O YuininTengen　Colors unknown↑5

Head-to-head

Up to 10 opponents, most-played first. Records are from Omori Yasushi'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
Kataoka Satoshi0-8.0000-20-2
Kanazawa Hideo1-5.1670-10-0
Nishimura Keiji2-4.3331-10-0
Kurotaki Masanori3-2.6000-11-0
So Yokoku0-5.0000-10-0
Kono Rin0-5.0000-10-2
Kato Tomoko3-2.6000-00-0
Yamada Shinji3-2.6000-00-0
Oki Keiji3-2.6000-10-0
Nakazawa Ayako3-1.7501-10-0

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
20264-8.333
20256-10.375
20248-9.471
20239-10.474
20225-11.313
20219-10.474
202016-12.571
201911-8.579
201816-11.593
201716-12.571
201612-10.545
201512-7.632
20144-5.444
20133-7.300
20129-8.529
20117-7.500
20102-3.400
20092-1.667
20080-2.000
20071-2.333
20064-6.400
20059-12.429
200411-9.550
20036-12.333
20029-4.692
20010-1.000
20001-2.333
19982-2.500
19971-1.500
19951-2.333
19940-1.000
19930-2.000
19922-3.400
19912-01.000
19901-4.200
19891-1.500
19880-1.000
19872-1.667
Total204-217.485

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