Kosuke Onishi

JPN · 33 yrs · K=20 · Peak 1856 (Mar 2024)

Best performance: 1923 at Japan Open 2019(Best of 2019)

NOV26 Rating

1804

Live Rating

1804.0

Change

0.0

Games Played

Rating History · Classical

Loading chart…

Official classical rating by month

Form · Classical

oldest → latest

Unbeaten in the last 3 games (3 wins), since May 5, 2025.

From 99 classical games on record, the latest on May 6, 2025.

Classical games since the November list

No rated standard games this rating periodsince the NOV26 list (Nov 1, 2026)

	Last played	Score	TPR
	Japan Chess Championship 2025 -The 26th Argentina Cup-May 2, 2025 – May 6, 2025TPR 1796	4½/9	1796

The live rating moves only when new rated games are played. Until then it matches the published rating.

From 74 rated classical games against rated opponents, 2017–2025

#	Opponent	Rating
1,	Tyler Scott, Aug 2018 · 2018 Japan Chess League	, 2065
2,	Show Kitagami, Apr 2019 · Japan Chess Championship 2019	, 2054
3,	Koji Noguchi, Nov 2020 · 2020 Japan Chess Championship	, 1997
4,	Battur Khaliun, Nov 2020 · 2020 Japan Chess Championship	, 1929
5,	Yuichi Yokoyama, Aug 2019 · Japan Chess Classic 2019	, 1883
6,	Huachun Zhu, Nov 2019 · Japan Open 2019	, 1821
7,	Toshiyuki Nagai, May 2019 · Japan Chess Championship 2019	, 1809
8,	Masashi Kitamura, Apr 2019 · Japan Chess Championship 2019	, 1789
9,	Hinata Kakishima, Jul 2024 · Japan Chess Classic 2024 (4-Day_Open)	, 1756
10,	Yuuma Nakanishi, May 2025 · Japan Chess Championship 2025 -The 26th Argentina Cup-	, 1752

#	Opponent	Overall	Rating
1,	IM Thanh Tu Tran, Highest-rated meeting: Apr 2022 · Japan Chess Championship 2022	, 0/1	, 2386
2,	IM Ryosuke Nanjo, Highest-rated meeting: Jul 2024 · Japan Chess Classic 2024 (4-Day_Open)	, 0/2	, 2367
3,	FM Mirai Aoshima, Highest-rated meeting: Aug 2019 · Japan Chess Classic 2019	, 0/1	, 2359
4,	Samuel Asaka, Highest-rated meeting: Nov 2021 · Japan Open 2021	, 0/1	, 2254
5,	FM Stephen Jones, Highest-rated meeting: May 2024 · Japan Chess Championship 2024 -The 25th Argentina Cup-	, 0/1	, 2247
6,	FM Kohei Yamada, Highest-rated meeting: May 2024 · Japan Chess Championship 2024 -The 25th Argentina Cup-	, 0/2	, 2198
7,	FM Simon Bibby, Highest-rated meeting: Oct 2021 · Gion Open	, 0/1	, 2159
8,	Tetsuo Higashino, Highest-rated meeting: Nov 2019 · Japan Open 2019	, ½/4	, 2131
9,	Naohiro Nakamura, Highest-rated meeting: Nov 2021 · Japan Open 2021	, 0/1	, 2111
10,	CM Atsuhiko Kobayashi, Highest-rated meeting: May 2025 · Japan Chess Championship 2025 -The 26th Argentina Cup-	, 0/1	, 2106

13 events

Events before the current rating period show the performance, not a rating change.

Live events show the rating change; earlier events show the performance rating.

Year	Games	Score	Avg opp	TPR
2025	7	3½	1796	1796
2024	19	8½	1804	1768
2022	6	2½	1825	1768
2021	7	1½	1932	1702
2020	7	3	1918	1868
2019	18	7	1934	1854
2018	5	1½	1902	1753
2017	5	1½	1759	1610

Games count in the month they were played. Each month and year is one performance rating over all of its rated games.

Japan Chess Championship 2025 -The 26th Argentina Cup-1796
May 2025Swissfederation source
Best of 2025Score 4½/9Opp avg 1796Start 1806
Japan Open 20241777
Nov 2024Swissfederation source
#2 in 2024Score 4½/7Opp avg 1720Start 1816
Japan Chess Classic 2024 (4-Day_Open)1796
Jul 2024Swissfederation source
Best of 2024Score 4½/7Opp avg 1883Start 1826
Japan Chess Championship 2024 -The 25th Argentina Cup-1745
May 2024Swissfederation source
#3 in 2024Score 3½/9Opp avg 1825Start 1856
Japan Chess Championship 20221768
Apr – May 2022Swissfederation source
Best of 2022Score 4/9Opp avg 1825Start 1768
Japan Open 20211794
Nov 2021Swissfederation source
Best of 2021Score 4½/7Opp avg 1881Start 1772
Gion Open1200
Oct 2021Swissfederation source
Score 4/7Opp avg 2000Start 1787
2020 Japan Chess Championship1868
Oct – Nov 2020Swissfederation source
Best of 2020Score 3/7Opp avg 1918Start 1749
Japan Open 20191923
Nov 2019Swissfederation source
Best of 2019Score 4/7Opp avg 1923Start 1704
Japan Chess Classic 20191758
Aug 2019Swissfederation source
#3 in 2019Score 4/7Opp avg 1951Start 1710
Japan Chess Championship 20191853
Apr – May 2019Swissfederation source
#2 in 2019Score 4½/10Opp avg 1933Start 1627
2018 Japan Chess League1753
Aug 2018Swissfederation source
Best of 2018Score 3/7Opp avg 1902Start 1610
2017 Japan Chess League1610
Aug 2017Swissfederation source
Best of 2017Score 3/7Opp avg 1759

Live ratings projected from the NOV26 published list · Not affiliated with FIDE