Japan at the 2025 World Aquatics Championships

Japan at the 2025 World Aquatics Championships
Flag of Japan
World Aquatics code	JPN
National federation	Japan Swimming Federation
Website	swim.or.jp (in Japanese)
in Singapore
Competitors	82 in 5 sports
Medals Ranked 12th	Gold 1 Silver 4 Bronze 3 Total 8
World Aquatics Championships appearances
1973 1975 1978 1982 1986 1991 1994 1998 2001 2003 2005 2007 2009 2011 2013 2015 2017 2019 2022 2023 2024 2025

Japan competed at the 2025 World Aquatics Championships in Singapore from July 11 to August 3, 2025.

Medalists

Medal	Name	Sport	Event	Date
	Ichika Kajimoto	Open water swimming	Women's 3 km knockout sprints	19 July 2025
	Kaho Aitaka Moka Fujii Moe Higa Yuka Kawase Uta Kobayashi Tomoka Sato Nao Shirahase Sakurako Uchida	Artistic swimming	Team free routine	20 July 2025
	Ippei Watanabe	Swimming	Men's 200 metre breaststroke	1 August 2025
	Tomoyuki Matsushita	Swimming	Men's 400 metre individual medley	3 August 2025
	Mio Narita	Swimming	Women's 400 metre individual medley	3 August 2025
	Reo Nishida Sho Sakai Rin Kaneto Sayaka Mikami	Diving	Team event	26 July 2025
	Ichika Kajimoto	Open water swimming	Women's 5 km	18 July 2025
	Tatsuya Murasa	Swimming	Men's 200 metre freestyle	29 July 2025

Competitors

The following is the list of competitors in the Championships. ^[1]

Sport	Men	Women	Total
Artistic swimming	0	9	9
Diving	6	2	8
Open water swimming	1	2	3
Swimming	19	14	33
Water polo	15	15	30
Total	41	41	82

Artistic swimming

Main article: Artistic swimming at the 2025 World Aquatics Championships

Women

Athlete	Event	Preliminaries		Final
		Points	Rank	Points	Rank
Moe Higa	Solo technical routine	249.1833	6 Q	251.2184	6
Moe Higa Tomoka Sato	Duet technical routine	293.4950	4 Q	295.6240	4
Uta Kobayashi Tomoka Sato	Duet free routine	255.9020	4 Q	254.9917	7

Mixed

Athlete	Event	Preliminaries		Final
		Points	Rank	Points	Rank
Kaho Aitaka Moka Fujii Moe Higa Yuka Kawase Uta Kobayashi Hinata Kumagai Tomoka Sato Nao Shirahase	Team technical routine	265.7967	6 Q	282.4134	4
Kaho Aitaka Moka Fujii Moe Higa Yuka Kawase Uta Kobayashi Tomoka Sato Nao Shirahase Sakurako Uchida	Team free routine	327.9186	3 Q	334.7232
'Kaho Aitaka Moka Fujii Moe Higa Yuka Kawase Uta Kobayashi Hinata Kumagai Tomoka Sato Sakurako Uchida	Team acrobatic routine	191.0638	9 Q	193.0367	10

Diving

Main article: Diving at the 2025 World Aquatics Championships

Men

Athlete	Event	Preliminaries		Semifinals		Final
		Points	Rank	Points	Rank	Points	Rank
Senri Ikuma	1 m springboard	Did not start		—		Did not advance
Reo Nishida	10 m platform	335.10	34	Did not advance
Sho Sakai	3 m springboard	396.80	10 Q	395.75	12 Q	406.45	11
Haruki Suyama	3 m springboard	343.30	39	Did not advance
Rikuto Tamai	10 m platform	466.60	3 Q	480.20	3 Q	492.55	6
Senri Ikuma Haruki Suyama	3 m synchro springboard	362.91	11	—		Did not advance
Shu Ohkubo Rikuto Tamai	10 m synchro platform	373.38	7 Q	—		369.24	8

Women

Athlete	Event	Preliminaries		Semifinals		Final
		Points	Rank	Points	Rank	Points	Rank
Rin Kaneto	10 m platform	306.25	6 Q	305.70	9 Q	306.20	10
Sayaka Mikami	3 m springboard	283.75	12 Q	300.45	7 Q	320.15	5

Mixed

Athlete	Event	Final
		Points	Rank
Reo Nishida Sho Sakai Rin Kaneto Sayaka Mikami	Team event	409.65

Open water swimming

Main article: Open water swimming at the 2025 World Aquatics Championships

Men

Athlete	Event	Heat		Semi-final		Final
		Time	Rank	Time	Rank	Time	Rank
Riku Takaki	Men's 3 km knockout sprints	18:46.6	27	Did not advance
	Men's 5 km	—				1:01:26.9	39
	Men's 10 km	—				2:09:18.8	34
Kaito Tsujimori	Men's 3 km knockout sprints	17:16.6	13	Did not advance
	Men's 5 km	—				1:01:00.2	25
	Men's 10 km	—				2:01:47.9	11

Women

Athlete	Event	Heat		Semi-final		Final
		Time	Rank	Time	Rank	Time	Rank
Ichika Kajimoto	Women's 3 km knockout sprints	18:09.9	2 Q	12:09.7	2 Q	6:19.9
	Women's 5 km	—				1:02:28.9
	Women's 10 km	—				2:09:27.8	8

Swimming

Main article: Swimming at the 2025 World Aquatics Championships

Japan entered 32 swimmers. ^[2]

Men

Athlete	Event	Heat		Semi-final		Final
		Time	Rank	Time	Rank	Time	Rank
Yamato Fukasawa	100 m breaststroke	1:00.23	18	Did not advance
	200 m breaststroke	2:10.83	9 Q	2:08.45	4 Q	2:09.21	6
Kazushi Imafuku	400 m freestyle	3:48.69	19	—		Did not advance
	1500 m freestyle	15:24.98	15			Did not advance
Kosuke Makino	200 m individual medley	1:57.74	2 Q	1:57.51	9 Q	1:59.25	8
Katsuhiro Matsumoto	50 m butterfly	23.34	19	Did not advance
	100 m butterfly	51.30	8 Q	51.20	11	Did not advance
Tomoyuki Matsushita	200 m individual medley	1:58.28	10 Q	1:57.11	4 Q	1:57.52	6
	400 m individual medley	4:10.39	1 Q	—		4:08.32
Riku Matsuyama	50 m backstroke	25.11	29	Did not advance
	100 m backstroke	53.94	21	Did not advance
Naoki Mizunuma	100 m butterfly	51.44	14 Q	50.96	9	Did not advance
Tatsuya Murasa	200 m freestyle	1:45.92	5 Q	1:45.39	6 Q	1:44.54 NR
Akira Namba	50 m freestyle	22.41	38	Did not advance
Asaki Nishikawa	400 m individual medley	4:10.41	2 Q	—		4:10.21	4
Kodai Nishiono	200 m backstroke	1:56.55	6 Q	1:56.04	11	Did not advance
So Ogata	200 m butterfly	1:55.37	9 Q	1:55.42	12	Did not advance
Hidekazu Takehara	200 m backstroke	1:57.25	19	Did not advance
Taikan Tanaka	50 m butterfly	23.58	31	Did not advance
Taku Taniguchi	50 m breaststroke	26.65 NR	2 Q	27.07	16	Did not advance
	100 m breaststroke	59.75	12 Q	59.59	14	Did not advance
Genki Terakado	200 m butterfly	1:54.64	6 Q	1:55.30	11	Did not advance
Ippei Watanabe	200 m breaststroke	2:08.41	2 Q	2:08.01	1 Q	2:07.70
Toshinari Yanagisawa	50 m breaststroke	27.23	18	Did not advance
Masaki Yura	50 m backstroke	25.35	38	Did not advance
Tatsuya Murasa Tomoyuki Matsushita So Ogata Asaki Nishikawa	4 × 200 m freestyle relay	7:09.17	10	—		Did not advance
Riku Matsuyama Taku Taniguchi Naoki Mizunuma Katsuhiro Matsumoto	4 × 100 m medley relay	3:34.36	13	—		Did not advance

Women

Athlete	Event	Heat		Semi-final		Final
		Time	Rank	Time	Rank	Time	Rank
Reona Aoki	100 m breaststroke	1:07.19	20	Did not advance
Yasuki Fujimoto	200 m butterfly	2:09.70	12 Q	2:10.20	13	Did not advance
Mizuki Hirai	50 m butterfly	25.64	9 Q	25.63	9	Did not advance
	100 m butterfly	56.81	4 Q	56.86	7 Q	56.83	7
Rikako Ikee	50 m butterfly	25.63	7 Q	25.67	11	Did not advance
	100 m butterfly	57.75	13 Q	57.89	14	Did not advance
Nagisa Ikemoto	100 m freestyle	54.90	25	Did not advance
	200 m freestyle	1:58.61	18	Did not advance
Ichika Kajimoto	400 m freestyle	4:08.79	12	—		Did not advance
	800 m freestyle	8:27.51	8 Q			8:26.85	8
	1500 m freestyle	16:09.65	10			Did not advance
Kotomi Kato	200 m breaststroke	2:27.91	22	Did not advance
Waka Kobori	200 m freestyle	1:59.06	22	Did not advance
	400 m individual medley	4:36.62	4 Q	—		4:38.05	7
Shiho Matsumoto	200 m individual medley	2:10.94	8 Q	2:11.69	14	Did not advance
Miyu Namba	400 m freestyle	4:08.72	11	—		Did not advance
Mio Narita	200 m backstroke	2:11.58	20	Did not advance
	200 m individual medley	2:10.87	7 Q	2:09.16	3 Q	2:09.56	5
	400 m individual medley	4:37.12	6 Q	—		4:33.26
Satomi Suzuki	50 m breaststroke	30.91	21	Did not advance
	100 m breaststroke	1:06.13	3 Q	1:06.12	6 Q	1:05.78	4
	200 m breaststroke	2:25.26	9 Q	2:26.44	14	Did not advance
Miki Takahashi	50 m backstroke	28.12	20	Did not advance
Chiaki Yamamoto	200 m backstroke	2:12.63	25	Did not advance
Nagisa Ikemoto Miyu Namba Waka Kobori Ichika Kajimoto	4 × 200 m freestyle relay	7:58.80	8 Q	—		7:58.13	8
Miki Takahashi Satomi Suzuki Mizuki Hirai Nagisa Ikemoto	4 × 100 m medley relay	3:56.85	5 Q	—		3:57.63	7

Mixed

Athlete	Event	Heat		Final
		Time	Rank	Time	Rank
Tatsuya Murasa Taikan Tanaka Nagisa Ikemoto Mizuki Hirai	4 × 100 m freestyle relay	3:26.77	14	Did not advance
Riku Matsuyama Taku Taniguchii Mizuki Hirai Nagisa Ikemoto	4 × 100 m medley relay	3:43.57	6 Q	3:44.15	7

Water polo

Main article: Water polo at the 2025 World Aquatics Championships

Summary

Team	Event	Group stage				Playoff	Quarterfinal	Semi-final	Final / BM
		Opposition Score	Opposition Score	Opposition Score	Rank	Opposition Score	Opposition Score	Opposition Score	Opposition Score	Rank
Japan	Men's tournament	Spain L 16–22	Hungary L 18–23	Australia W 12–11	3 P/Off	Serbia L 14–21	—	Brazil W 22–11	Romania W 20–19	9
Japan	Women's tournament	Croatia W 25–12	Hungary L 13–33	Greece L 15–25	3 P/Off	Great Britain W 23–10	United States L 8–26	Australia L 17–21	Italy L 15–20	8

Men's tournament

Main article: Water polo at the 2025 World Aquatics Championships – Men's tournament

Team roster

The following is the Japanese roster. ^{[3] [4]}

Head coach: Yoshinori Shiota

• 1 Towa Nishimura GK
• 2 Seiya Adachi FP
• 3 Taiyo Watanabe FP
• 4 Toshiyuki Maeda FP
• 5 Enishi Ura FP
• 6 Toi Suzuki FP
• 7 Kiyomu Date FP
• 8 Mitsuru Takata FP
• 9 Ikkei Nitta FP
• 10 Yusuke Inaba FP
• 11 Daichi Ogihara FP
• 12 Kenta Araki FP
• 13 Ren Sasano GK
• 14 Jun Lowrey FP
• 15 Yuki Moriya FP

Group play

Pos	Team v t e	Pld	W	PSW	PSL	L	GF	GA	GD	Pts	Qualification
1	Spain	3	3	0	0	0	42	32	+10	9	Quarterfinals
2	Hungary	3	2	0	0	1	50	34	+16	6	Playoffs
3	Japan	3	1	0	0	2	46	56	−10	3
4	Australia	3	0	0	0	3	24	40	−16	0	13–16th place semifinals

Source: Omegatiming
Rules for classification: 1) points; 2) head-to-head points; 3) head-to-head goal difference; 4) head-to-head number of goals scored; 5) Goal difference.

12 July 2025 16:00	Report	Spain	22–16	Japan	OCBC Aquatic Centre, Singapore Referees: Scott Voltz (USA), Michiel Zwart (NED)
		Score by quarters:5–3, 6–2, 5–4, 6–7
		Granados 5	Goals	Inaba 5

14 July 2025 13:45	Report	Japan	18–23	Hungary	OCBC Aquatic Centre, Singapore Referees: Georgios Stavridis (GRE), Germán Moller (ARG)
		Score by quarters: 5–5, 3–5, 3–5, 7–8
		Adachi, Watanabe 4	Goals	Vismeg 4

16 July 2025 10:35	Report	Australia	11–12	Japan	OCBC Aquatic Centre, Singapore Referees: Germán Moller (ARG), Michiel Zwart (NED)
		Score by quarters: 3–3, 2–3, 2–0, 4–6
		Power 5	Goals	four players 2

Playoffs

18 July 2025 16:00	Report	Serbia	21–14	Japan	OCBC Aquatic Centre, Singapore Referees: David Gómez (ESP), Frank Ohme (GER)
		Score by quarters:5–2, 4–3, 9–3, 3–6
		Vapenski 4	Goals	three players 3

9th–12th place semifinals

20 July 2025 12:10	Report	Japan	22–11	Brazil	OCBC Aquatic Centre, Singapore Referees: Germán Moller (ARG), Scott Voltz (USA)
		Score by quarters:7–1, 7–4, 4–3, 4–3
		Inaba 5	Goals	Real 3

Ninth place game

22 July 2025 10:35	Report	Japan	20–19	Romania	OCBC Aquatic Centre, Singapore Referees: Alessia Ferrari (ITA), Scott Voltz (USA)
		Score by quarters:8–1, 4–3, 2–8, 2–4  PSO:4–3
		Inaba 5	Goals	Georgescu, Neamțu 3

Women's tournament

Main article: Water polo at the 2025 World Aquatics Championships – Women's tournament

Team roster

The following is the Japanese roster. ^{[5] [6]}

Head coach: Shota Hazui

• 1 Haruka Inaba GK
• 2 Yumi Arima FP
• 3 Akari Inaba FP
• 4 Eruna Ura FP
• 5 Kako Kawaguchi FP
• 6 Hikaru Shitara FP
• 7 Ai Sunabe FP
• 8 Saya Sekine FP
• 9 Riko Otsubo FP
• 10 Fuka Nishiyama FP
• 11 Momo Inoue FP
• 12 Maho Kobayashi FP
• 13 Manami Noda GK
• 14 Shoka Fukuda FP
• 15 Momone Ninagawa FP

Group play

Pos	Team v t e	Pld	W	PSW	PSL	L	GF	GA	GD	Pts	Qualification
1	Hungary	3	3	0	0	0	65	28	+37	9	Quarterfinals
2	Greece	3	2	0	0	1	65	32	+33	6	Playoffs
3	Japan	3	1	0	0	2	53	70	−17	3
4	Croatia	3	0	0	0	3	25	78	−53	0	13–16th place semifinals

Source: Omegatiming
Rules for classification: 1) points; 2) head-to-head points; 3) head-to-head goal difference; 4) head-to-head number of goals scored; 5) Goal difference.

11 July 2025 16:00	Report	Japan	25–12	Croatia	OCBC Aquatic Centre, Singapore Referees: Fiona Haigh (AUS), Zhang Liang (CHN)
		Score by quarters:7–3, 4–3, 11–5, 3–1
		Arima 7	Goals	Rožić 4

13 July 2025 10:35	Report	Hungary	33–13	Japan	OCBC Aquatic Centre, Singapore Referees: Germán Moller (ARG), Megan Perry (NZL)
		Score by quarters:8–3, 8–2, 9–3, 8–5
		Rybanska, Vályi 6	Goals	Arima 4

15 July 2025 10:35	Report	Greece	25–15	Japan	OCBC Aquatic Centre, Singapore Referees: Wu Zhekang (SGP), Scott Voltz (USA)
		Score by quarters:6–3, 6–3, 6–4, 7–5
		Myriokefalitaki 7	Goals	Kawaguchi 5

Playoffs

17 July 2025 20:45	Report	Japan	23–10	Great Britain	OCBC Aquatic Centre, Singapore Referees: Aurély Blanchard (FRA), Fiona Haigh (AUS)
		Score by quarters:6–2, 5–2, 5–1, 7–5
		Ura 4	Goals	five players 2

Quarterfinals

19 July 2025 17:35	Report	United States	26–8	Japan	OCBC Aquatic Centre, Singapore Referees: Alessia Ferrari (ITA), Marta Cabanas (ESP)
		Score by quarters:10–2, 6–1, 5–2, 5–3
		Pearson 5	Goals	Sunabe, Ura 2

5-8th place semifinals

21 July 2025 16:00	Report	Australia	21–17	Japan	OCBC Aquatic Centre, Singapore Referees: Jennifer McCall (USA), Germán Moller (ARG)
		Score by quarters:7–6, 6–4, 2–3, 6–4
		Jackovich 5	Goals	Arima 5

Fifth place game

23 July 2025 16:00	Report	Japan	15–20	Italy	OCBC Aquatic Centre, Singapore Referees: Aurély Blanchard (FRA), Nicholas Hodgers (AUS)
		Score by quarters: 5–5, 2–5, 2–6, 6–4
		Fukuda 3	Goals	Cergol, Gagliardi 5

References

1. "Competition athletes". World Aquatics . Retrieved 30 July 2025.
2. "Entries Book" (PDF). Omega Timing. 24 July 2025. Retrieved 30 July 2025.
3. "Men's Water Polo Team Roster JPN" (PDF). Omega Timing. 12 July 2025. Retrieved 23 July 2025.
4. "Men's Water Polo Team Roster JPN (2)" (PDF). Omega Timing. 22 July 2025. Retrieved 25 July 2025.
5. "Women's Water Polo Team Roster JPN" (PDF). Omega Timing. 11 July 2025. Retrieved 23 July 2025.
6. "Women's Water Polo Team Roster JPN (2)" (PDF). Omega Timing. 21 July 2025. Retrieved 25 July 2025.