Go Player Ratings

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Yamamoto Masato

Yamamoto Masato (山本正人) has a rating of 1353, ranked 379 of 452 in professional play. Their highest rating so far is 1491 (March 11, 2024).

Yamamoto Masato8 dan山本正人Nihon Ki-in Tokyo
Rating1353
Rank379
1-year change±0
Peak rating1491
Last 10105-185
2026 record
4-6
Record since 1927
105-185
Win rate
.362

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

Professional ratingsFind a player

Rating history — professional

11 gamesHigh 1378Low 1337
39 gamesHigh 1491Low 1337
66 gamesHigh 1491Low 1337
209 gamesHigh 1491Low 1314

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 18, 2026Takemiya YokoOza　Colors unknown↓9
May 28, 2026Morita MichihiroHoninbo　Colors unknown↓3
April 23, 2026Kobayashi SatoruTengen　Colors unknown↓4
April 16, 2026Hagiya KazuhiroHoninbo　Colors unknown↑11
March 26, 2026Cho KoharuTengen　Colors unknown↑14
March 19, 2026Seki RyosukeGosei　Colors unknown↓5
March 12, 2026Mimura KaoriJudan　Colors unknown↓17
March 2, 2026Rafif Shidqi FitrahKisei First Tournament Preliminary Round 2　Colors unknown↓11
January 29, 2026Fujisawa KazunariJudan　Colors unknown↑24
January 22, 2026Kawai ShojiKisei First Tournament Preliminary Round 1　Colors unknown↑17
November 20, 2025Cho ChienMeijin　Colors unknown↓17
August 14, 2025Takeuchi KosukeOza　Colors unknown↓3
July 17, 2025Tanimiya AyakoOza　Colors unknown↑4
July 14, 2025Izawa AkinoRyusei　Colors unknown↓18
June 26, 2025Shibano RyunosukeTengen　Colors unknown↓12
May 15, 2025Sugiuchi KazukoTengen Preliminary C　as Black↑8
April 24, 2025Okada ShinichiroGosei　Colors unknown↓11
April 10, 2025Okada YumikoHoninbo　Colors unknown↓20
March 20, 2025Ko ReibunJudan　Colors unknown↓13
March 17, 2025Fujisawa KazunariAgon Kiriyama Cup　Colors unknown↓11

Head-to-head

Up to 10 opponents, most-played first. Records are from Yamamoto Masato'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
Kanda Ei2-4.3330-00-0
Tokimoto Hajime2-3.4000-00-1
Rin Shien1-3.2500-00-0
Nobuta Shigehito3-1.7500-00-0
Suzuki Isao2-2.5000-00-0
Kubo Hideo0-4.0000-00-0
Ogaki Yusaku2-2.5000-00-0
Haruyama Isamu0-4.0000-00-0
Kawai Shoji3-1.7500-00-0
Fujisawa Kazunari1-3.2500-10-0

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
20264-6.400
20253-10.231
20245-9.357
20237-8.467
20223-9.250
20218-9.471
20202-6.250
20194-8.333
20183-10.231
20174-12.250
20169-9.500
20157-10.412
20143-4.429
20131-3.250
20125-7.417
20112-6.250
20101-3.250
20091-1.500
20080-1.000
20062-4.333
20054-9.308
20048-9.471
20038-10.444
20026-7.462
19982-1.667
19971-1.500
19950-1.000
19930-2.000
19910-1.000
19900-2.000
19840-1.000
19832-1.667
19790-1.000
19780-1.000
19770-1.000
19750-1.000
19730-1.000
Total105-185.362

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