CChessStats

Japan Open 2025(Challenger Category)

Open SwissStandard

139 players participated in this 9-round tournament, held from 19 Sept 2025 to 23 Sept 2025 in Tokyo, Japan. 9 titled players from 8 federations. Top 10 Elo average was 1932, and top seed was Tuan Anh Nguyen (🇯🇵 JPN, 1988).

Taewoo A Kim (🇰🇷 KOR, 1857) won with 7.5/9, ahead of Shixuan Xue (7.5) and Keita Shakuya (7.0). Kim shared the lead from round 5, winning on tie-break.

The biggest upset came in round 8: Howe Luong Lim (1528) beat Steven D Young (1849), a +321-point gap.

Location
🇯🇵Tokyo, Japan
Dates
19 Sept 2025 → 23 Sept 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 9 rounds
Top seed
🇯🇵Tuan Anh Nguyen1988
Avg top 10
1,932
Participants
139
Titled players · 9
WCM×9
Federations · 8 represented
🇯🇵Japan×77
🇨🇳China×10
🇹🇼Chinese Taipei×9
🇰🇷South Korea×8
🇭🇰Hong Kong China×6
🇰🇬Kyrgyzstan×4
🇧🇩Bangladesh×4
🇺🇸United States of America×4
Top 3

How it unfolded

Top 6 · 9 rounds

Tight race until R6; 2 players tied at 7.5/9, decided on Buchholz. Title race narrowed from 3 co-leaders at R4 to 2 at the finish.

Co-leaders
61
26
12
3
5
1
1
2
2
2.54.579R1R2R3R4R5R6R7R8R9
R6–R9 · LEAD HELD

Taewoo A Kim held the sole lead from R6 through R9 without losing it.

R9 · TIEBREAK CLUSTER

2 players finish on 7.5/9. Kim takes the title on Buchholz Cut1 (48.5).

R9 · HEAD-TO-HEAD · WINNER VS 2ND

Taewoo A Kim drew with Shixuan Xue (White).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Taewoo A Kim*
½
2Shixuan Xue
½
*
3Show Kitagami*
4Islambek Baisynov*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΔ
1Kim, Taewoo A1857KOR+107B=19N+57B+40N+12B+3N+14B=6N=2B7.548.551.541.502088+50.8
2Xue, Shixuan1920CHN+36N+67B+28N=7B=13N+39B+15N+29B=1N7.547.552.042.002065+30.0
3Shakuya, Keita1819JPN+84N+105B+75N+18B=39N1B+16N=33B+12B7.044.047.034.251996+75.2
4Kitagami, Show1878JPN+74N=8B25N+86B+57N=41B+19N+15B+13N7.043.547.536.251936+12.2
5Baisynov, Islambek1914KGZ78N+72B+105N+59B+26N=19B=7N+25B+6B7.043.046.035.751914+3.0
6Tran, Duc Hung Long1969VIE+44N+22B+17N=13B+7N=15B+18N=1B5N6.551.056.039.251970+4.4
7Wu, Chen- Hao1818TPE+121B+78N+14B=2N6B+26N=5B=20N+29N6.548.050.533.751977+80.4
8Sun, Chang-Jyu1698TPE+120B=4N+50B16B+11N=12N+80B+39B=9N6.546.048.532.752006+130.4
9Patil, Rushad1846JPN+93N+51B26N+62B=41B+42N=17B+53N=8B6.542.546.031.751847+1.8
10Xu, Xiaodi1547CHN+23N=25B115N+79B28N+51B+57N+34B+33N6.541.544.533.251955+187.2
11Saito, Hiromasa1877JPN+95B76N+78B=55N8B+48N+42B+110N+30B6.538.541.528.501833-7.2
12Araki, Dai1828JPN+112N+38B+49N=26B1N=8B+41N+22B3N6.048.051.030.501796-6.0
13Song, Jihu1820KOR+99B+62N+32B=6N=2B14N+31B+43N4B6.047.551.031.001897+40.0
14Nguyen, Tuan Anh1988JPN+132N+79B7N+35B+47N+13B1N=17B=23N6.046.547.527.501888-19.4
15Zhou, Tony1770HKG+118B+98N+20B+34B=16N=6N2B4N+74B6.046.048.527.751914+63.6
16Planche, Pierre-Francois1958FRA+124B+37N=40B+8N=15B=25N3B=27N+43B6.046.048.030.001863-19.4
17Zhu, AliciaWCM1791USA+91B+60N6B=31N+69B+24B=9N=14N=20B6.045.549.531.001904+56.0
18Tanaka, Satoshi1885JPN+65B+42N+54B3N+27B+75N6B=30N=19B6.045.049.029.751854-6.2
19Noda, Ryo1682JPN+138N=1B+128N=25B+45B=5N4B+58N=18N6.044.544.524.501963+116.4
20Nodon, Jeremi1897JPN+94N+59B15N+83B+37N+36B29N=7B=17N6.043.547.029.251863-6.0
21Kihara, Taira0JPN=57B=27N+43B47N+77B30N+46B+54N+58B6.040.044.028.5018150.0
22Bhatia, Praveen1761JPN+89B6N31B+121N+106B+46N+74B12N+52B6.039.041.523.501742-2.8
23Kato, Ami1810JPN10B+134N+107B74N=65B+95N+26B+61N=14B6.037.538.522.751778-5.2
24Gishi, Takeshi1971JPN+126B40N+109B+77N=53B17N+75B=45N+55B6.037.039.023.001831-26.2
25Jang, Seojun1788KOR+134B=10N+4B=19N+74B=16B=39N5N=36B5.547.048.026.501811+16.0
26Lim, Howe Luong1528MAS+30B+136N+9B=12N5B7B23N+104N+63B5.545.046.023.501904+162.8
27Lopez de Anda, Edgar1743HKG=52N=21B+129N+49B18N+35B=34N=16B=32N5.544.546.526.501806+11.0
28Onuma, Kota1779JPN+64B+82N2B=60N+10B29B=32N+62B=35N5.544.048.027.251721-20.8
29Kuroda, Yunosuke1903JPN+88B77N+73B=76N+40B+28N+20B2N7B5.543.047.027.001840-12.8
30Nakanishi, Yuuma1790JPN26N+81B+94N=44B=35N+21B+62N=18B11N5.543.046.526.251714-28.4
31Chongstitwattana, Cholapat1590THA39N+133B+22N=17B=58N+66B13N=37B+57N5.542.043.024.001840+51.8
32Lee, Onbin1676KOR+85N+61B13N=33B=50B=45N=28B+70N=27B5.541.545.526.251852+38.6
33Summerville, Nathan1847JPN60B+91N+95B=32N=55B+54N+76B=3N10B5.541.545.025.251733-23.2
34Abe, Taro1860JPN+106B+43N+77B15N=42B=53N=27B10N+59B5.541.544.524.251775-18.0
35Niori, Toma1606JPN+92B=50N+70B14N=30B27N+104B+40N=28B5.541.044.024.501900+135.6
36Jiang, Luning1627CHN2B+96N+92B+63N+104B20N53B+47B=25N5.541.044.022.751871+106.8
37Hasegawa, EmiWCM1745JPN+101B16B+97N+48N20B74N+106B=31N+110B5.536.539.520.751718-5.2
38Kim, Dohyun D1669KOR+139B12N+102B104N+96B=70N45B+64N+115B5.533.033.016.751718+6.2
39Thapa, Lekha Bahadur1845NEP+31B+46N+76B+41N=3B2N=25B8NF5.046.046.025.751831-3.0
40Yokota, Yoshiaki1765JPN+103N+24B=16N1B29N+56B=44N35B+84N5.044.548.024.001767+1.4
41Mooi, Kok Onn Osric1689SGP+131B+80N+104B39B=9N=4N12B+48NF5.041.542.519.751864+32.8
42Lee, Donghyun C1714KOR+100N18B+111N+58B=34N9B11N+93B=44N5.041.044.019.751755+9.6
43Takayama, Tadayoshi1690JPN+119N34B21N+129B+52N+47B+61N13B16N5.040.542.519.001789+30.4
44Cha, Tony1631JPN6B+89N+80B=30N=70B=50N=40B=63N=42B5.040.044.022.751812+73.6
45Chen, YueyiWCM1853GERF+121N+65B+51B19N=32B+38N=24BF5.040.040.023.251852+4.4
46Pichon, Mathieu1678FRA+116N39B52N+68B+49N22B21N+87B+75N5.039.542.020.001673-0.6
47Kojima, NatsumiWCM1769JPN+108N75B+87N+21B14B43N+64B36N+88B5.039.042.021.501686-13.4
48Furuse, Mizuki1575JPN61N+116B+67N37B+59N11B+66N41B+83N5.039.041.520.001750+72.0
49Chong, Wing Hei0JPN+71B+63N12B27N46B+88N+79B+76N53B5.038.542.521.0017550.0
50Clark, Domenic1812JPN+81N=35B8N+123B=32N=44B110N+86B=56N5.038.540.520.501656-35.4
51Takase, Hayato1676JPN+113B9N+98B45N=64B10N+99B=60N+91B5.038.041.018.501578-38.8
52Takahashi, Taiga0JPN=27B=109N+46B53N43B+124N+94N+83B22N5.037.039.018.7517120.0
53Nguyen Cong Khen1762VIEFF+93N+52B=24N=34B+36N9B+49N5.037.037.024.751848+24.0
54Burgess, Joseph1729JPN+122N+58B18N75B+97N33B+84N21B+111N5.036.538.517.001827+32.8
55Chen, YuefanWCM1703GERF+118N+127B=11B=33N80N+81B+75B24N5.034.534.518.501761+18.4
56Chung, Frederick H.1609TPE80B+131N63B=82N+117B40N+96B+71N=50B5.033.034.016.001644+7.6
57Mitsuyama, RikkaWCM1758JPN=21N+123B1N+101B4B+60N10B+69N31B4.545.047.017.501619-52.4
58Otake, Sakae1916JPN+73B54N+124B42N=31B+65N+71B19B21N4.541.043.018.251709-38.8
59Zhang, Yicheng1708JPN+114B20N+64B5N48B=68N+97B+95N34N4.539.542.516.751634-16.6
60Aritro, Dhar1599BAN+33N17B+79N=28B61N57B+125N=51B=67N4.539.541.519.001729+52.4
61Sugimoto, Koichi1826JPN+48B32N+106B=69N+60B=76N43B23B=62N4.539.042.019.001666-37.4
62Ishii, Hibiki1667JPN+102B13B+85N9N+122B+104N30B28N=61B4.538.540.514.751625-12.0
63Karasawa, Yuta1778JPN+68N49B+56N36B=93N=108B+87N=44B26N4.538.041.019.251606-33.0
64Wang, Yifan(BJ)1506CHN28N+66B59N+105B=51N+86B47N38B+94N4.537.540.517.501693+88.8
65Wu, Sinian1618CHN18N+117B45N+116B=23N58B=101N+90B=66N4.536.038.516.001660+8.8
66Koyama, Nobuyuki1739JPN82B64N+89B+91N+107B31N48B+81N=65B4.535.538.517.251561-32.4
67Curtis, Toby1731JPN+96B2N48B+134N110B+82N+107B74N=60B4.534.535.513.751529-77.2
68Du, Jonathan Bao1485USA63B69N+113B46N+73B=59B86N+103N+95B4.534.037.016.751598+44.0
69Lau, Tsz Yiu Christ1668HKG98N+68B+100N=61B17N+101B115N57B+99N4.533.536.517.251650-3.4
70Ogasa, Seiichi1798JPN=123N+110B35N+108B=44N=38BF32B+78N4.533.533.516.251639-30.6
71Kawamura, Takuto1735JPN49N+90B=108N128B+100N+93B58N56B+97N4.532.034.016.001641-16.4
72Wang Alison0TPE=109B5N110N+135B108N=90B+112N=94B+93N4.530.031.012.7516150.0
73Ramkumar, Aravindh1623JPN58N+122B29N100B68N+119B=116N+117B+98N4.529.031.011.75968-40.0
74Hung, I-Hsuan1617TPE4B+120NF+23B25N+37B22N+67B15N4.043.044.018.501733+40.4
75Zhao, Ming0CHN+135B+47N3B+54N+115B18B24N55N46B4.042.043.014.0017370.0
76Fukuda, Toyoaki1703JPN+117N+11B39N=29BF=61B33N49B+101N4.038.040.017.501788+10.8
77Kakishima, Hinata1717JPN+125B+29B34N24B21N81B90N+96N+108B4.037.539.514.001580-43.2
78Lam, Lok Sum1621HKG+5B7B11N+111N80B127N+122B+108N70B4.036.538.515.001686+9.4
79Mamatkulov, Azizjon1766JPN+111B14N60B10N=118B+103N49N=82B+123N4.035.037.011.751570-65.2
80Shishido, Yusuke1873JPN+56N41B44N+81B+78N+55B8NFF4.034.534.518.001693-59.6
81Murugappan N1550IND50B30N+120B80N+114B+77N55N66B+105N4.034.036.512.501597+6.0
82Jie, Jingfei0JPN+66N28B83N=56B+123N67B93N=79N+106B4.034.036.014.0016290.0
83Misawa, YukiWCM1682JPN+137B104N+82B20N+99B92N+108B52N48B4.033.533.510.501572-17.8
84Hehir, Stephen1557JPN3B92N114B+113N+120B+130N54B+109N40B4.032.533.59.501527-7.6
85Noda, Kyohei0JPN32B+99N62B106N+91B109N88B+122N+107B4.030.532.512.5015240.0
86Liang, Haoyang1624CHNF128B+125N4N+103B64N+68B50N+127B4.030.530.512.001535-30.8
87Karimov, Ismail1600KGZ104B+113N47B96N+89B+122N63B46N+130B4.030.031.010.00969-22.6
88Chen, Zixi1620CHN29N100B117N+131B+119N49B+85N+123B47N4.030.031.09.501614-2.4
89Yoshida, Sou0JPN22N44B66N+133B87N+135B105N+113B+112N4.029.530.58.0014990.0
90Itokazu, Antonio1510JPN136B71N+131B92N=102B=72N+77B65N+109B4.029.030.012.001604+25.6
91Li, Chengfei1528CHN17N33B+137N66B85N+138B+130N+105B51N4.029.029.04.001501+1.6
92Tanaka, Ryosuke1859JPN35N+84B36N+90B+94N+83BFFF4.026.526.515.501723-35.6
93Aditya, Mohajan1593BAN9B+139N53B+114N=63B71N+82B42N72B3.537.037.09.251401-35.2
94Wong, Linda JaneWCM1619TPE20B+114N30B+127N92B+111N52B=72N64B3.535.537.510.251456-20.8
95Kumasaka, Akiho1616JPN11N+119B33N=117B+125N23B+98N59B68N3.535.537.59.25945-67.6
96Tsai, Nicholas0USA67N36B+112N+87B38N=97B56N77B+116N3.535.037.511.2514950.0
97Yen, Yu-Ting1570TPE115B+130N37B+102N54B=96N59N+100B71B3.533.034.09.75947-54.0
98Visvanathan, Kieran Chang0TPE+69B15B51N107N+132B=99N95B+118N73B3.532.533.59.7515420.0
99Kanehara, Hiromichi1564JPN13N85B+119N+130B83N=98B51N+116B69B3.532.033.07.75911-24.8
100Kitahara, Fumihiro0JPN42B+88N69B+73N71B106N=121B97N+118B3.531.534.012.2515360.0
101Sato, Keito0JPN37NF+132B57N+109B69N=65B+107N76B3.530.030.09.2516320.0
102Wada, Ryotaro0JPN62N+112B38N97B=90N105B118B+132N+122B3.528.029.08.0014500.0
103Jang, Seungwoo1431KOR40B124N+139B=109N86N79B+132N68B+117N3.526.026.05.001423-2.0
104Young, Steven D1849USA+87N+83B41N+38B36N62B35N26BF3.039.539.513.501546-63.4
105Abe, Masahiro1649JPN+130B3N5B64N111B+102N+89B91N81B3.037.038.08.50818-131.6
106You, GaramWCM1608KOR34N+138B61N+85B22N+100B37N111B82N3.036.036.07.50925-35.2
107Kothakota, Satya Sandesh1603JPN1N+137B23N+98B66N+116B67N101B85N3.036.036.06.00984-42.8
108Khamkuer, Thanthorn1436THA47B+135N=71B70N+72B=63N83N78B77N3.035.036.010.001525+25.6
109Nukui, Michitaka1663JPN=72N=52B24N=103B101N+85B=123N84B90N3.034.536.511.501362-77.6
110Liang, Zhuobin1579CHNF70N+72BF+67NF+50B11B37N3.030.530.514.001721+33.6
111Akiyama, Kairi1433JPN79N+126N42B78B+105N94BF+106N54B3.029.531.58.001580+52.0
112Zawad, Hussain1576BAN12B102N96B+137N127B+114N72B+120N89B3.029.029.05.501029-7.6
113Lo, Gareth0HKG51N87B68N84B+131N132B+119N89N+126B3.027.028.05.5013250.0
114Solanki, Shambhavi0JPN59N94B+84N93B81N112B+137N130B+133N3.024.524.55.0013280.0
115Kanda, Daigo1820JPN+97NF+10BF75NF+69BF38N3.024.024.014.501808-0.8
116Li, Yu Tung0HKG46B48N+118B65N+121B107N=73B99N96B2.531.534.07.2514420.0
117Hernandez, Jino0JPN76B65N+88B=95N56N123B+126B73N103B2.531.033.07.7514340.0
118Anobadyo, Shristi Ghosh1448BAN15N55B116N+138B=79N125B+102N98B100N2.530.030.05.501473+2.0
119Watanabe, Timofei0JPN43B95N99B+126N88B73N113B+131N=120B2.528.029.04.2513510.0
120FIDE 700784108N74B81N+139B84N129B+133N112B=119N2.527.027.02.257840.0
121Deno, Masahiko1554JPN7N45B+138N22B116N+133B=100NFF2.524.524.52.751010-22.4
122Okita, Ken0JPN54B73N+126B+124N62N87B78N85B102N2.031.533.54.0014850.0
123Wang, Minrui1545JPN=70B57NF50N82B+117N=109B88N79B2.031.532.56.251463-22.4
124Toyota, Yusuke1630JPN16N+103B58N122B+129N52BFFF2.026.026.05.501703+5.6
125Nakamura, Junko0JPN77NF86B+132N95B+118N60BF129N2.021.521.53.5014340.0
126Lin, Yu-Fei1632TPE24N111B122N119B133N+131B117N+137B113N2.021.021.01.00903-34.8
127Handika, Rangga0JPNFF55N94B+112N+78BFF86N2.019.519.57.0015570.0
128Erkoc, Vedat1854JPNF+86N19B+71NFFFFF2.018.518.58.501806-3.6
129Inoue, Satomi1507JPNFF27B43N124B+120NFF+125B2.017.017.04.50888-31.6
130FIDE 163058170105N97BF99NF84B91B+114N87N1.026.026.03.007710.0
131Ramkumar, Aaradh0JPN41N56B90N88N113B126NF119B+137N1.025.525.50.008110.0
132Matsumoto, Shinji1636JPN14BF101N125B98N+113N103B102BF1.025.025.03.00909-34.8
133Ismailov, Bolotbek0KGZF31N134B89N+126B121N120BF114B1.020.520.52.0013820.0
134Ishitsu, Mike1524JPN25N23B+133N67BFFFFF1.018.018.01.00976-23.2
135Ravneet, Kaur1643JPN75N108BF72N+137B89NFFF1.017.517.50.00639-15.2
136Ursely, Arthur1781FRA+90N26BFFFFFFF1.013.513.54.001522-12.8
137FIDE 547037830083N107N91B112B135NF114B126N131B0.021.021.00.008040.0
138FIDE 7006683019B106N121B118NF91NFFF0.018.018.00.007560.0
139Tavakalov, Doolatbek0KGZ38N93B103N120NFFFFF0.015.015.00.007650.0

Key insights

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