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Sato Masaharu

Sato Masaharu (佐藤昌晴) has a rating of 1489. Their highest rating so far is 1700 (March 16, 2006).

Retired. The rating shown is the rating at retirement.

Sato Masaharu佐藤昌晴Nihon Ki-in Tokyo
Rating1489
Rank—
1-year change—
Peak rating1700
Last 10296-306
2025 record
5-9
Record since 1927
296-306
Win rate
.492

Rating at retirement (not included in the rating list)

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

Professional ratingsFind a player

Rating history — professional

33 gamesHigh 1553Low 1470
60 gamesHigh 1553Low 1467
256 gamesHigh 1700Low 1456

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 7, 2025Ueda TakashiOza　Colors unknown↓19
July 7, 2025Onishi RyuheiRyusei　Colors unknown↓2
June 30, 2025Takahashi HideoTengen　Colors unknown↓23
June 23, 2025Osawa NarumiHoninbo　Colors unknown↓20
June 16, 2025Seki RyosukeOza　Colors unknown↑18
June 2, 2025Cho SonjinJudan　Colors unknown↓7
May 25, 2025Nakaonoda TomomiTengen　Colors unknown↑24
May 12, 2025Kono YukioHoninbo　Colors unknown↑2
May 1, 2025Yoda OzoraJudan　Colors unknown↑19
March 20, 2025Numadate SakiyaHoninbo　Colors unknown↑28
March 10, 2025Onishi RyuheiAgon Kiriyama Cup　Colors unknown↓3
February 10, 2025Kondo ToshikiMeijin　Colors unknown↓9
January 30, 2025Sugimoto AkiraGosei　Colors unknown↓14
January 23, 2025Awaji ShuzoKisei First Tournament Preliminary Round 2　Colors unknown↓11
December 23, 2024Oki KeijiKisei First Tournament Preliminary Round 1　Colors unknown↑11
August 12, 2024Han ZenkiRyusei　Colors unknown↓5
August 12, 2024Kikuchi MasatoshiRyusei　Colors unknown↑11
July 25, 2024Omori YasushiOza　Colors unknown↓15
June 13, 2024Kudo NorioOza　Colors unknown↑15
May 9, 2024Kobayashi ChizuOza　Colors unknown↑8

Head-to-head

Up to 10 opponents, most-played first. Records are from Sato Masaharu'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
Awaji Shuzo3-9.2502-20-4
Otake Hideo1-8.1110-50-2
Cho Chikun1-8.1110-41-3
Tozawa Akinobu5-3.6252-21-0
Takemiya Masaki4-4.5003-21-2
Sakai Takeshi7-1.8754-01-0
Sakata Eio0-7.0000-00-7
Ishida Yoshio0-7.0000-20-4
Haruyama Isamu4-3.5713-01-2
Nakamura Hidehito6-1.8573-03-0
Kataoka Satoshi1-6.1431-30-2
Takagi Shoichi2-5.2861-20-3
Rin Kaiho0-6.0000-00-4
Fukui Masaaki4-2.6672-11-1
Ishigure Ikuro3-3.5001-10-2
Ishida Akira1-4.2001-20-2
Ishii Mamoru4-1.8002-00-1

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
20255-9.357
20249-8.529
20236-9.400
20225-8.385
20218-10.444
20208-7.533
20193-11.214
201818-9.667
20177-12.368
20164-10.286
20157-10.412
20144-4.500
20138-5.615
20124-7.364
20118-5.615
20102-1.667
20090-2.000
20081-2.333
20070-3.000
200610-8.556
200516-8.667
20047-9.438
20034-8.333
20028-8.500
20000-1.000
19960-1.000
19953-2.600
19942-11.154
19931-2.333
19911-4.200
19903-3.500
19890-2.000
19880-2.000
19870-4.000
19862-5.286
19852-1.667
19843-3.500
19831-6.143
19826-8.429
198113-14.481
19809-6.600
19796-4.600
19785-7.417
197712-11.522
197610-6.625
197515-4.789
197417-5.773
197312-7.632
19723-4.429
19716-2.750
19704-4.500
19695-3.625
19683-1.750
Total296-306.492

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