Go Player Ratings

JAAbout ratings

Yanai Kazuma

Yanai Kazuma (柳井一真) has a rating of 1641, ranked 171 of 452 in professional play. Their highest rating so far is 1660 (July 30, 2026).

Yanai Kazuma2 dan柳井一真Nihon Ki-in Tokyo
Rating1641
Rank171
1-year change↑30
Peak rating1660
Last 1038-35
2026 record
10-8
Record since 1927
38-35
Win rate
.520

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

Professional ratingsFind a player

Rating history — professional

21 gamesHigh 1660Low 1584
68 gamesHigh 1660Low 1483
72 gamesHigh 1660Low 1479
72 gamesHigh 1660Low 1479

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, 2026Ueno AsamiOza　Colors unknown↓3
August 6, 2026Yoshida TomaHiroshima Aluminum Cup Wakagoi Preliminary Semifinal　Colors unknown↓17
July 30, 2026Kanazawa HideoHoninbo　Colors unknown↑21
July 27, 2026Nishimura KeijiOza　Colors unknown↑9
July 13, 2026Ko ReibunHoninbo　Colors unknown↑16
June 18, 2026Izawa AkinoOza　Colors unknown↑9
May 28, 2026Jo BunenTengen　Colors unknown↓15
May 14, 2026Takayama NonokaOza　Colors unknown↑4
May 7, 2026Onishi RyuheiMeijin　Colors unknown↓1
April 30, 2026Takemiya MasakiTengen　Colors unknown↑15
April 23, 2026Hino ShotaGlobis Cup Japan Representative Playoff Round 1　Colors unknown—
April 16, 2026Shibusawa MachikoHoninbo　Colors unknown↑1
April 9, 2026Okada ShinichiroMeijin　Colors unknown↑12
March 12, 2026Kikuchi MasatoshiTengen　Colors unknown↑5
February 23, 2026Mochizuki KenichiGosei　Colors unknown↓7
February 12, 2026Anzai NobuakiKisei First Tournament Preliminary Round 2　Colors unknown↓4
January 29, 2026Mori ChisakiJudan　Colors unknown↓25
January 15, 2026Moro ArisaKisei First Tournament Preliminary Round 1　Colors unknown↑15
December 22, 2025Ueda TakashiMeijin　Colors unknown↑10
December 15, 2025Kondo ToshikiShinjin-O Preliminary　Colors unknown↓12

Head-to-head

Up to 10 opponents, most-played first. Records are from Yanai Kazuma'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
Yanagihara Saki3-01.0001-01-0
Hino Shota0-2.0000-10-0
Takayama Nonoka2-01.0001-00-0
Jo Bunen0-2.0000-00-1
Onishi Ryuhei0-2.0000-00-0
Izawa Akino2-01.0000-00-0
Kondo Toshiki0-2.0000-00-0
Tanaka Yuki0-2.0000-00-1
Kobayashi Izumi2-01.0000-00-0
Fujisawa Rina0-2.0000-10-0

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
202610-8.556
202515-13.536
202412-11.522
20231-3.250
Total38-35.520

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