Japan Open 2025(Master Category)

SwissStandard

35 players participated in this 9-round tournament, held from 19 Sept 2025 to 23 Sept 2025 in Tokyo, Japan. 19 titled players from 8 federations. Top 10 Elo average was 2431, and top seed was Samvel Ter-Sahakyan (🇦🇲 ARM, GM, 2611).

Arif Abdul Hafiz (🇮🇩 INA, IM, 2386) won with 7.5/9, ahead of Samvel Ter-Sahakyan (7.0) and Paul Velten (6.0). Hafiz shared the lead from round 4 and won solo starting round 7.

The biggest upset came in round 1: Kan Nakahara (CM, 2171) beat Susanto Megaranto (GM, 2483), a +312-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

🇦🇲GMSamvel Ter-Sahakyan2611

Avg top 10

2,431

Participants

Titled players · 19

GM×4

IM×5

FM×6

CM×4

Federations · 8 represented

🇯🇵Japan×21

🇮🇩Indonesia×3

🇰🇷South Korea×3

🇫🇷France×2

🇨🇳China×2

🇦🇲Armenia×1

🇨🇦Canada×1

🇸🇬Singapore×1

Top 3

🥇
IMArif Abdul Hafiz
🇮🇩INA·2386
7.5pts·2637perf+55.6
🥈
GMSamvel Ter-Sahakyan
🇦🇲ARM·2611
7.0pts·2618perf+1.5
🥉
GMPaul Velten
🇫🇷FRA·2536
6.0pts·2460perf-6.3

How it unfolded

Top 6 · 9 rounds

IM Arif Abdul Hafiz led from R5; +0.5-point edge over the runner-up. Title race converged from 3 co-leaders at R4 to 1 by R5.

Co-leaders

Hafiz7.5Ter-Sahakyan7Kwon6Velten6Lee6Swayams5.5

R5 · LEADER CHANGE21 Sept

IM Arif Abdul Hafiz takes the sole lead (4.5/5).

R6 · HEAD-TO-HEAD · WINNER VS 2ND

IM Arif Abdul Hafiz drew with GM Samvel Ter-Sahakyan (Black).

WIN STREAKS · 2 top finishers

IM Arif Abdul Hafiz 3 wins (R3–R5)GM Samvel Ter-Sahakyan 3 wins (R1–R3)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1IMArif Abdul Hafiz	*	½	½	1
2GMSamvel Ter-Sahakyan	½	*	—	½
3FMSehyun Kwon	½	—	*	1
4GMPaul Velten	0	½	0	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	R8	R9	Pts	Bu C1	Bu	SB	Perf	Δ
1	Hafiz, Arif AbdulIM	2386	INA	+13B	=23N	+9B	+7N	+3B	=2N	+6N	=5B	+10N	7.5	46.0	49.5	41.25	2637	+55.6
2	Ter-Sahakyan, SamvelGM	2611	ARM	+17B	+11N	+8B	=3N	=4B	=1B	=7N	+6B	+9N	7.0	47.0	51.5	39.00	2618	+1.5
3	Velten, PaulGM	2536	FRA	+18N	+15B	=4N	=2B	−1N	+16B	−5N	+7B	+12N	6.0	46.0	50.5	30.50	2460	-6.3
4	Lee, JunhyeokIM	2435	KOR	+34B	+16N	=3B	+10N	=2N	−6B	+12N	=9B	=5N	6.0	45.0	46.5	28.75	2455	+4.3
5	Kwon, SehyunFM	2253	KOR	+24B	−7N	+14B	+23N	=8B	=21N	+3B	=1N	=4B	6.0	42.5	46.0	29.00	2416	+38.8
6	Megaranto, SusantoGM	2483	INA	−23B	+13N	+17B	+19N	+9B	+4N	−1B	−2N	=8B	5.5	45.5	49.0	28.25	2399	-7.4
7	Swayams, MishraGM	2446	IND	+27N	+5B	=10N	−1B	=16N	+15B	=2B	−3N	+19B	5.5	45.5	49.0	27.00	2419	-2.1
8	Tran, Thanh TuIM	2412	JPN	+20N	+12B	−2N	=21B	=5N	+18B	−10N	+15B	=6N	5.5	42.5	46.5	26.25	2355	-4.5
9	Aoshima, MiraiFM	2354	JPN	+25N	+35B	−1N	+12B	−6N	+23B	+21B	=4N	−2B	5.5	42.0	43.0	20.00	2343	+1.4
10	Otsuka, ShouFM	2329	JPN	+33B	+14N	=7B	−4B	−21N	+22N	+8B	+17N	−1B	5.5	41.5	43.0	22.75	2324	+2.0
11	Kojima, ShinyaIM	2318	JPN	+26N	−2B	−21N	=22B	+30N	−12B	+29N	+18B	+14B	5.5	35.5	38.0	20.00	2208	-10.7
12	Gu, Injung	2023	KOR	+19B	−8N	+32B	−9N	+17B	+11N	−4B	+21N	−3B	5.0	41.5	43.5	20.50	2337	+66.2
13	Averbukh, AlexCM	2097	JPN	−1N	−6B	+30N	=26B	+25N	=14B	−15N	+23B	+21B	5.0	36.5	39.0	17.50	2233	+28.8
14	Martin, Axel	2020	FRA	+21N	−10B	−5N	=25B	+26N	=13N	=22B	+16B	−11N	4.5	38.0	41.5	18.25	2180	+35.8
15	Nanjo, RyosukeIM	2311	JPN	+28B	−3N	=23B	=20N	+31B	−7N	+13B	−8N	=17B	4.5	38.0	40.5	17.25	2222	-9.8
16	Chen, KailinFM	2264	CHN	+30N	−4B	=20N	+27B	=7B	−3N	=24B	−14N	+22B	4.5	37.5	40.0	16.75	2199	-14.8
17	Yamada, KoheiFM	2186	JPN	−2N	+26B	−6N	+35B	−12N	+31B	+23N	−10B	=15N	4.5	37.0	38.0	12.75	2218	+4.6
18	Song, Samuel	2175	CAN	−3B	=28N	+24B	=31N	+20B	−8N	=19B	−11N	+30N	4.5	35.5	38.0	15.75	2188	+1.2
19	Owen, MichaelCM	2222	INA	−12N	+25B	+35N	−6B	−23N	+27B	=18N	+24B	−7N	4.5	34.5	35.5	13.75	2171	-13.0
20	Higashino, Tetsuo	2103	JPN	−8B	+29N	=16B	=15B	−18N	−24N	=28B	+32N	+27B	4.5	32.5	34.5	14.75	2165	+13.6
21	Chen, Muxi	2189	CHN	−14B	+33N	+11B	=8N	+10B	=5B	−9N	−12B	−13N	4.0	42.5	44.0	18.25	2165	-11.6
22	Yonemitsu, Kohei	2053	JPN	F	F	+33B	=11N	+35N	−10B	=14N	+25B	−16N	4.0	26.0	26.0	11.00	2203	+26.8
23	Nakahara, KanCM	2171	JPN	+6N	=1B	=15N	−5B	+19B	−9N	−17B	−13N	=28B	3.5	43.0	46.5	17.75	2179	-0.4
24	Shioguchi, Tatsuya	2027	JPN	−5N	=27B	−18N	=29B	+33N	+20B	=16N	−19N	−26B	3.5	34.0	35.5	11.50	2061	+6.6
25	Okuno, Rion	2069	JPN	−9B	−19N	+29B	=14N	−13B	+28N	=26B	−22N	=32B	3.5	33.5	35.5	11.50	2025	-24.0
26	Nakamura, Naohiro	2047	JPN	−11B	−17N	F	=13N	−14B	+30B	=25N	=27B	+24N	3.5	32.5	32.5	12.00	2068	+3.0
27	Moritani, Sho	2138	JPN	−7B	=24N	+34B	−16N	=28B	−19N	+35B	=26N	−20N	3.5	31.0	32.0	7.75	2060	-41.2
28	Nagataki, Kota	2037	JPN	−15N	=18B	−31N	+32B	=27N	−25B	=20N	=29B	=23N	3.5	29.5	31.5	11.50	2042	-0.2
29	Matsunaga, Toma	2001	JPN	F	−20B	−25N	=24N	F	+32B	−11B	=28N	+34N	3.0	24.0	24.0	7.00	2061	+19.6
30	Jiang, Likai	2030	JPN	−16B	=32N	−13B	+34N	−11B	−26N	+31N	F	−18B	2.5	29.0	29.0	5.00	2001	-15.2
31	Furuya, Masahiro	2010	JPN	F	=34N	+28B	=18B	−15N	−17N	−30B	=33N	F	2.5	22.5	22.5	7.25	2028	+1.6
32	Sanjay, Vasu	2116	SGP	F	=30B	−12N	−28N	+34B	−29N	F	−20B	=25N	2.0	23.5	23.5	4.50	1895	-84.8
33	Matsuo, TomohikoCM	2066	JPN	−10N	−21B	−22N	F	−24B	−35N	+34N	=31B	F	1.5	22.0	22.0	2.75	1873	-33.8
34	Jones, StephenFM	2107	JPN	−4N	=31B	−27N	−30B	−32N	F	−33B	+35N	−29B	1.5	22.0	22.0	2.25	1849	-53.0
35	Yamamoto, Soichiro	2003	JPN	F	−9N	−19B	−17N	−22B	+33B	−27N	−34B	F	1.0	25.0	25.0	1.50	1852	-22.2

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Gu, InjungKOR
+66.2
5.0 pts · #12
2Hafiz, Arif AbdulIMINA
+55.6
7.5 pts · #1
3Kwon, SehyunFMKOR
+38.8
6.0 pts · #3

Top rating losers

1Sanjay, VasuSGP
-84.8
2.0 pts · #32
2Jones, StephenFMJPN
-53.0
1.5 pts · #34
3Moritani, ShoJPN
-41.2
3.5 pts · #28

Biggest upsets

R1+312 Elo gap
CMNakahara, Kan2171 beat GMMegaranto, Susanto2483
R6+295 Elo gap
Gu, Injung2023 beat IMKojima, Shinya2318
R7+283 Elo gap
FMKwon, Sehyun2253 beat GMVelten, Paul2536