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Seki Tatsuya

Seki Tatsuya (関達也) has a rating of 1475. Their highest rating so far is 1547 (December 26, 2015).

Seki Tatsuya4 dan関達也Nihon Ki-in Tokyo
Rating1475
Rank—
1-year change—
Peak rating1547
Last 10109-153
2025 record
2-7
Record since 1927
109-153
Win rate
.416

No games in the last year

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

Professional ratingsFind a player

Rating history — professional

28 gamesHigh 1544Low 1432
64 gamesHigh 1544Low 1432
257 gamesHigh 1547Low 1349

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 19, 2025Kim SujunTengen　Colors unknown↓3
May 8, 2025Terayama ReiHoninbo　Colors unknown↓4
April 3, 2025Oki KeijiJudan　Colors unknown↓22
March 27, 2025Yanai KazumaMeijin　Colors unknown↓13
March 3, 2025Takayama NonokaJudan　Colors unknown↑9
February 27, 2025Ishida YoshioGosei　Colors unknown↓15
February 17, 2025Takekiyo IsamuAgon Kiriyama Cup　Colors unknown↓19
February 13, 2025Muramatsu RyuichiMeijin　Colors unknown↑9
January 30, 2025Uchida ShuheiKisei First Tournament Preliminary Round 2　Colors unknown↓6
December 23, 2024Cho KosumiKisei First Tournament Preliminary Round 1　Colors unknown↑13
September 5, 2024Koike YoshihiroOza　Colors unknown↓2
August 12, 2024Koyama TerumiHoninbo　Colors unknown↓13
August 5, 2024Yokotsuka RikiRyusei　Colors unknown↓3
July 29, 2024Kanda EiRyusei　Colors unknown↑15
July 25, 2024Rafif Shidqi FitrahOza　Colors unknown↑17
July 8, 2024Cho ChikunHoninbo　Colors unknown↑28
June 20, 2024Kenmochi JoOza　Colors unknown↑15
June 10, 2024Tahara YasufumiHoninbo　Colors unknown↑13
June 6, 2024Kato TomokoTengen　Colors unknown↓20
May 30, 2024Shoji KazukoOza　Colors unknown↑1

Head-to-head

Up to 10 opponents, most-played first. Records are from Seki Tatsuya'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
Matsubara Taisei6-01.0000-00-0
Nakamura Hidehito4-1.8000-00-0
Cho Chikun1-4.2000-00-2
Taniguchi Toshinori4-01.0000-00-0
Onishi Kenya2-1.6670-00-0
Numadate Sakiya0-3.0000-00-0
O Yuinin3-01.0000-00-0
Inaba Takahiro0-3.0000-00-0
Kojima Takaho2-1.6670-00-0
Tsuneishi Takashi0-3.0000-00-0

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
20252-7.222
202410-8.556
20236-11.353
20226-7.462
20218-12.400
20209-9.500
20193-11.214
201812-14.462
20179-15.375
20169-14.391
201517-8.680
20141-6.143
20131-4.200
20121-10.091
20117-6.538
20103-2.600
20091-2.333
20081-4.200
20072-1.667
20060-1.000
20051-1.500
Total109-153.416

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