Go Player Ratings

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Kasai Koji

Kasai Koji (笠井浩二) has a rating of 1200, ranked 424 of 452 in professional play. Their highest rating so far is 1457 (May 12, 2017).

Kasai Koji7 dan笠井浩二Nihon Ki-in Tokyo
Rating1200
Rank424
1-year change↓14
Peak rating1457
Last 1074-184
2026 record
0-6
Record since 1927
74-184
Win rate
.287

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

Professional ratingsFind a player

Rating history — professional

7 gamesHigh 1211Low 1200
30 gamesHigh 1253Low 1200
54 gamesHigh 1275Low 1200
174 gamesHigh 1457Low 1200

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
June 1, 2026Obuchi KotaroOza　Colors unknown↓1
May 25, 2026Toyoda HirohitoHoninbo　Colors unknown↓2
April 16, 2026Mizokami TomochikaTengen　Colors unknown↓1
April 6, 2026O RisseiGosei　Colors unknown↓1
February 12, 2026Kibe NatsukiJudan　Colors unknown↓3
January 26, 2026Inaba TakahiroKisei First Tournament Preliminary Round 1　Colors unknown↓3
November 13, 2025Hino ShotaMeijin　Colors unknown↓4
August 11, 2025Sugimoto AkiraRyusei　Colors unknown↓5
June 5, 2025Koyama TerumiOza　Colors unknown↓3
May 15, 2025Cho KosumiTengen　Colors unknown↓7
May 8, 2025Fujii KokiMeijin　Colors unknown↓1
April 24, 2025Tsuneishi TakashiGosei　Colors unknown↓2
April 17, 2025Awaji ShuzoHoninbo　Colors unknown↓2
April 3, 2025Mizuma ToshifumiMeijin　Colors unknown↑27
March 20, 2025Mannami NaoJudan　Colors unknown↓6
February 24, 2025Ueda TakashiAgon Kiriyama Cup　Colors unknown↓9
February 6, 2025Kin EnGosei　Colors unknown↑20
December 26, 2024Kaneko MakiKisei First Tournament Preliminary Round 1　Colors unknown↓14
August 19, 2024Sugimoto AkiraRyusei　Colors unknown↓4
May 16, 2024Ueda TakashiGosei　Colors unknown↓7

Head-to-head

Up to 10 opponents, most-played first. Records are from Kasai Koji'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
Mizuma Toshifumi3-2.6000-00-0
Sugimoto Akira0-4.0000-00-0
Aragaki Takeshi1-3.2501-00-0
Awaji Shuzo1-3.2501-00-0
Kaku Kyushin3-1.7500-00-0
Takano Hideki1-2.3330-00-0
Kin En1-2.3330-00-0
Ono Nobuyuki1-2.3330-00-0
Hiramoto Yasei2-1.6670-00-0
Koyama Terumi0-3.0000-00-0

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
20260-6.000
20252-9.182
20243-8.273
20231-10.091
20223-8.273
20212-10.167
20200-7.000
20194-9.308
20180-6.000
201711-14.440
20165-10.333
20155-8.385
20141-4.200
20131-2.333
20123-5.375
20111-5.167
20066-5.545
20056-8.429
20044-9.308
20033-10.231
20021-8.111
20010-1.000
19990-1.000
19980-1.000
19950-1.000
19940-1.000
19930-1.000
19920-1.000
19910-1.000
19901-2.333
19890-2.000
19870-1.000
19861-01.000
19781-1.500
19774-3.571
19764-1.800
19751-2.333
19710-2.000
19700-1.000
Total74-184.287

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