Go Player Ratings

JAAbout ratings

Onishi Kenya

Onishi Kenya (大西研也) has a rating of 1820, ranked 73 of 452 in professional play. Their highest rating so far is 1961 (December 4, 2025).

Onishi Kenya6 dan大西研也Nihon Ki-in Tokyo
Rating1820
Rank73
1-year change↓133
Peak rating1961
Last 10231-171
2026 record
3-13
Record since 1927
231-171
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

23 gamesHigh 1961Low 1810
84 gamesHigh 1961Low 1769
149 gamesHigh 1961Low 1769
397 gamesHigh 1961Low 1494

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 27, 2026Ogaki YusakuGosei　Colors unknown↓20
August 20, 2026Koyama KuyaHiroshima Aluminum Cup Wakagoi Preliminary Final　Colors unknown↑24
August 20, 2026Arai KantaHiroshima Aluminum Cup Wakagoi Preliminary Semifinal　Colors unknown↑6
August 13, 2026Rin KanketsuKisei League B2　as White↓10
July 23, 2026Sugimoto AkiraGosei　Colors unknown↑6
July 13, 2026Miura TaroKisei League B2　as Black↓7
July 2, 2026Sotoyanagi SebunHoninbo　Colors unknown↓16
June 25, 2026Hon AkiyoshiKisei　as White↓13
June 18, 2026Hon AkiyoshiKisei League B2　as White↓14
May 24, 2026Sada AtsushiNHK Cup Round 1　as Black↓7
May 21, 2026U BoiKisei League B2　as White↓14
April 20, 2026Onishi RyuheiKisei League B2　as White↓7
March 16, 2026Seto TaikiOza Final Preliminary Final　as Black↓14
March 2, 2026Koyama KuyaKisei League B2　as Black↓13
February 19, 2026I RyoKisei League B2　as Black↓12
February 2, 2026Akiyama JiroJudan Preliminary C　as White↓21
December 22, 2025Hirata TomoyaTengen Preliminary A　as White↓10
December 4, 2025Anzai NobuakiOza Preliminary A Final　as Black↑17
November 20, 2025Rin KanketsuMeijin　Colors unknown↓15
November 13, 2025Fujita AkihikoTengen Preliminary A　as White↑18

Head-to-head

Up to 10 opponents, most-played first. Records are from Onishi Kenya'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
Hirose Yuichi1-6.1430-20-2
Sun Zhe2-5.2860-10-2
Yokotsuka Riki2-5.2862-10-1
Oomote Takuto4-2.6670-10-0
Koike Yoshihiro2-4.3330-20-1
Xie Yimin3-3.5000-13-0
Taniguchi Toru5-01.0003-01-0
Anzai Nobuaki1-4.2001-00-0
Tsuruyama Atsushi3-2.6001-00-0
Yu Zhengqi0-5.0000-20-2
Mutsuura Yuta1-4.2000-11-3
Fujita Akihiko2-3.4000-11-0
Rin Kanketsu2-3.4000-01-1
Takeuchi Kosuke5-01.0000-01-0
Hirata Tomoya1-4.2000-00-1
Fujisawa Rina3-2.6001-00-1
Kanazawa Hideo3-2.6000-01-0

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
20263-13.188
202526-10.722
202414-10.583
202318-14.563
202216-13.552
202120-16.556
202024-9.727
201927-12.692
201815-14.517
201719-16.543
201618-11.621
201511-15.423
20148-8.500
20139-6.600
20123-4.429
Total231-171.575

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