Go Player Ratings

JAAbout ratings

Mizuma Toshifumi

Mizuma Toshifumi (水間俊文) has a rating of 1465, ranked 294 of 452 in professional play. Their highest rating so far is 1619 (March 7, 2022).

Mizuma Toshifumi8 dan水間俊文Nihon Ki-in Tokyo
Rating1465
Rank294
1-year change↑22
Peak rating1619
Last 10160-191
2026 record
5-8
Record since 1927
160-191
Win rate
.456

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

Professional ratingsFind a player

Rating history — professional

14 gamesHigh 1489Low 1440
48 gamesHigh 1566Low 1438
96 gamesHigh 1619Low 1438
269 gamesHigh 1619Low 1389

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 17, 2026Tajima ShingoSGW Cup Chuyo Preliminary Round 1　Colors unknown↓13
July 27, 2026Takeshita RyoyaTengen　Colors unknown↓8
July 6, 2026Aoki ShinichiTengen　Colors unknown↑21
June 1, 2026Jo BunenOza　Colors unknown↓8
May 25, 2026Sakai MakiHoninbo　Colors unknown↓14
May 7, 2026Kono TakashiTengen　Colors unknown↑18
April 20, 2026Mannami KanaJudan　Colors unknown↓18
April 16, 2026Takao ShinjiGosei　Colors unknown↓2
April 6, 2026Kobayashi IzumiHoninbo　Colors unknown↑21
March 23, 2026Hara SachikoGosei　Colors unknown↑5
March 16, 2026Yoda OzoraTengen　Colors unknown↑23
January 22, 2026Sonoda YasutakaMeijin　Colors unknown↓11
January 12, 2026Yoshida TomaKisei First Tournament Preliminary Round 1　Colors unknown↓13
November 10, 2025Shiraishi YuichiMeijin Preliminary C　as Black↑22
September 11, 2025Ishida AtsushiSGW Cup Chuyo Preliminary Round 1　as Black↓7
August 4, 2025Suzuki IsaoOza　Colors unknown↓17
July 21, 2025Sakai MakiRyusei　Colors unknown↓13
July 21, 2025Aoki KikuyoRyusei　Colors unknown↑15
June 30, 2025Mochizuki KenichiJudan　Colors unknown↓6
June 23, 2025Kanno MasashiOza　Colors unknown↑10

Head-to-head

Up to 10 opponents, most-played first. Records are from Mizuma Toshifumi'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
Muramatsu Ryuichi5-3.6250-00-0
Sonoda Yasutaka4-2.6670-00-0
Kasai Koji2-3.4000-00-0
Sakai Takeshi2-3.4000-00-0
Mochizuki Kenichi0-4.0000-00-0
Akiyama Jiro1-3.2501-00-0
Aoki Kikuyo3-1.7500-00-0
Kobayashi Kenji3-1.7500-00-0
Shiraishi Yuichi2-2.5002-00-0
Ueda Takashi1-3.2500-00-0

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
20265-8.385
20257-10.412
20247-9.438
202314-10.583
20225-9.357
202117-12.586
20207-8.467
20192-10.167
20187-10.412
20176-13.316
20165-12.294
201510-6.625
20140-5.000
20134-4.500
201215-11.577
20114-5.444
20100-2.000
20066-4.600
20055-10.333
200413-8.619
200310-12.455
20028-7.533
20000-1.000
19990-1.000
19931-2.333
19920-1.000
19910-1.000
19902-01.000
Total160-191.456

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