List of Japanese records in swimming

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These are the Japanese records in swimming: they are the fastest times ever swum by a swimmer from Japan in recognized events. The records are kept and maintained by the Japan Swimming Federation (JSF). The JSF recognizes records swum in both long course (50m) and short course (25m) pools.

Long course (50 metres)

Men

Event Time Name Club Date Meet Location Ref
50 m freestyle 21.64 AS Shuya Matsumoto Himawari Network 27 July 2025 Shizuoka Championships Fuji, Japan
100 m freestyle 47.85 Katsuhiro Matsumoto Mitsuuroko 6 April 2023 Japanese Championships Tokyo, Japan
200 m freestyle 1:44.54 Tatsuya Murasa  Japan 29 July 2025 World Championships Singapore, Singapore
400 m freestyle 3:43.90 Kosuke Hagino Toyo University 12 April 2014 Japanese Championships Tokyo, Japan
800 m freestyle 7:48.34 Kazushi Imafuku  Japan 21 August 2025 World Junior Championships Otopeni, Romania
1500 m freestyle 14:50.18 Kazushi Imafuku Flat SS 23 March 2025 Japanese Championships Tokyo, Japan
50m backstroke 24.24 AS Junya Koga  Japan 2 Aug 2009 World Championships Rome, Italy
100m backstroke 52.24 r Ryosuke Irie Kinki University 5 Sep 2009 Japanese University Championships Kumamoto, Japan
200m backstroke 1:52.51 AS Ryosuke Irie  Japan 31 Jul 2009 World Championships Rome, Italy
50m breaststroke 26.65 h Taku Taniguchi  Japan 29 July 2025 World Championships Singapore, Singapore
100m breaststroke 58.78 Yasuhiro Koseki  Japan 17 June 2018 Mare Nostrum Monte Carlo, Monaco
200m breaststroke 2:06.40 Shoma Sato Tokyo SC 7 April 2021 Japanese Championships Tokyo, Japan
50m butterfly 23.06 Taikan Tanaka Kikkoman 20 March 2025 Japanese Championships Tokyo, Japan
100m butterfly 50.81 sf Naoki Mizunuma  Japan 23 June 2022 World Championships Budapest, Hungary
200m butterfly 1:52.53 AS Daiya Seto  Japan 18 January 2020 Champions Swim Series Beijing, China
200m individual medley 1:55.07 Kosuke Hagino Toyo University 9 April 2016 Japanese Championships Tokyo, Japan
400m individual medley 4:06.05 AS Kosuke Hagino  Japan 6 August 2016 Olympic Games Rio de Janeiro, Brazil
4×50m freestyle relay 1:27.48
  • Shinri Shioura
     (22.07)
  • Akira Namba
     (21.69)
  • Kaiya Seki
     (22.17)
  • Katsumi Nakamura
     (21.55)
  Japan 3 July 2021 Summer Challenge Meet Sagamihara, Japan
4×100m freestyle relay 3:12.54
  • Katsumi Nakamura
     (48.52)
  • Shinri Shioura
     (48.19)
  • Katsuhiro Matsumoto
     (47.61)
  • Juran Mizohata
     (48.22)
  Japan 11 August 2018 Pan Pacific Championships Tokyo, Japan
4×200m freestyle relay 7:02.26
  • Sho Uchida
     (1:45.90)
  • Yoshihiro Okumura
     (1:45.83)
  • Shogo Hihara
     (1:45.99)
  • Takeshi Matsuda
     (1:44.54)
  Japan 31 July 2009 World Championships Rome, Italy
4×50m medley relay 1:36.44
  • Masaki Yura
     (25.04)
  • Taku Taniguchi
     (26.42)
  • Katsuhiro Matsumoto
     (22.89)
  • Akira Namba
     (22.09)
  Japan 7 June 2025 Tokyo Championships Tokyo, Japan
4×100m medley relay 3:29.91
  • Ryosuke Irie
     (53.05)
  • Ryuya Mura
     (58.94)
  • Naoki Mizunuma
     (50.88)
  • Katsumi Nakamura
     (47.04)
  Japan 1 August 2021 Olympic Games Tokyo, Japan
Legend: # – Record awaiting ratification by Japan Swimming Federation; WR – World record; AS – Asian record;
Records not set in finals: h – heat; sf – semifinal; r – relay 1st leg; rh – relay heat 1st leg; b – B final; † – en route to final mark; tt – time trial

Women

Event Time Name Club Date Meet Location Ref
50m freestyle 24.21 Rikako Ikee Renaissance Kameido 6 April 2018 Japanese Championships Tokyo, Japan
100m freestyle 52.79 Rikako Ikee Renaissance Kameido 18 November 2018 Kosuke Kitajima Cup Tokyo, Japan
200m freestyle 1:54.85 Rikako Ikee  Japan 9 August 2018 Pan Pacific Championships Tokyo, Japan
400m freestyle 4:05.19 Ai Shibata  Japan 25 Mar 2007 World Championships Melbourne, Australia
800m freestyle 8:23.68 Sachiko Yamada Konami 23 Apr 2004 Japanese Championships Tokyo, Japan
1500m freestyle 15:58.55 Ai Shibata  Japan 27 Mar 2007 World Championships Melbourne, Australia
50m backstroke 27.51 Aya Terakawa Mizuno 13 April 2013 Japanese Championships Niigata, Japan
100m backstroke 58.70 r, AS Aya Terakawa  Japan 4 August 2013 World Championships Barcelona, Spain
200m backstroke 2:07.13 Reiko Nakamura  Japan 16 Aug 2008 Olympic Games Beijing, China
50m breaststroke 30.10 Satomi Suzuki  Japan 8 October 2023 Shizuoka Invitational Sprint Championships Shizuoka, Japan
100m breaststroke 1:05.19 Reona Aoki Mizuno 2 March 2022 Japanese World Championships Trials Tokyo, Japan
200m breaststroke 2:19.65 AS Rie Kaneto Jaked 9 April 2016 Japanese Championships Tokyo, Japan
50m butterfly 25.11 Rikako Ikee  Japan 10 June 2018 Mare Nostrum Canet-en-Roussillon, France
100m butterfly 56.08 Rikako Ikee  Japan 11 August 2018 Pan Pacific Championships Tokyo, Japan
200m butterfly 2:04.69 Natsumi Hoshi Swin Daikyo 5 April 2012 Japanese Championships Tokyo, Japan
200m individual medley 2:07.91 Yui Ohashi  Japan 24 July 2017 World Championships Budapest, Hungary
400m individual medley 4:30.82 Yui Ohashi Itoman Toshin 8 April 2018 Japanese Championships Tokyo, Japan
4×50m freestyle relay 1:39.67
  • Chihiro Igarashi
     (25.11)
  • Rikako Ikee
     (24.71)
  • Natsumi Sakai
     (25.30)
  • Rika Omoto
     (24.55)
  Japan 4 July 2021 Summer Challenge Meet Sagamihara, Japan
4×100m freestyle relay 3:36.17 h
  • Rika Omoto
     (54.21)
  • Tomomi Aoki
     (54.01)
  • Aya Sato
     (53.98)
  • Rio Shirai
     (53.97)
  Japan 21 July 2019 World Championships Gwangju, South Korea
4×200m freestyle relay 7:48.96
  • Chihiro Igarashi
     (1:57.88)
  • Rikako Ikee
     (1:54.69)
  • Rio Shirai
     (1:58.29)
  • Yui Ohashi
     (1:58.10)
  Japan 10 August 2018 Pan Pacific Championships Tokyo, Japan
4×50m medley relay 1:48.12
  • Miki Takahashi
     (28.20)
  • Satomi Suzuki
     (29.72)
  • Mizuki Hirai
     (25.46)
  • Nagisa Ikemoto
     (24.76)
  Japan 7 June 2025 Tokyo Championships Tokyo, Japan
4×100m medley relay 3:54.73
  • Natsumi Sakai
     (59.42)
  • Satomi Suzuki
     (1:05.43)
  • Rikako Ikee
     (55.80)
  • Tomomi Aoki
     (54.08)
  Japan 23 August 2018 Asian Games Jakarta, Indonesia
Legend: # – Record awaiting ratification by Japan Swimming Federation; WR – World record; AS – Asian record;
Records not set in finals: h – heat; sf – semifinal; r – relay 1st leg; rh – relay heat 1st leg; b – B final; † – en route to final mark; tt – time trial

Mixed relay

Event Time Name Club Date Meet Location Ref
4×50 m freestyle relay 1:36.79 not officially ratified
  • Katsumi Nakamura
  • Naoya Shiota
  • Mio Narita
  • Ruka Takezawa
  Japan 19 January 2025 South Australia State Open & MC Championships Adelaide, Australia
4×100 m freestyle relay 3:24.67
  • Katsumi Nakamura
     (48.49)
  • Katsuhiro Matsumoto
     (47.99)
  • Rika Omoto
     (54.36)
  • Aya Sato
     (53.83)
  Japan 27 July 2019 World Championships Gwangju, South Korea
4×50 m medley relay 1:47.13 not officially ratified
  • Naoya Shiota
  • Taku Taniguchi
  • Umi Ishizuka
  • Ruka Takezawa
  Japan 19 January 2025 South Australia State Open & MC Championships Adelaide, Australia
4×100 m medley relay 3:40.98
  • Ryosuke Irie
     (52.83)
  • Yasuhiro Koseki
     (58.57)
  • Rikako Ikee
     (55.53)
  • Tomomi Aoki
     (54.05)
  Japan 9 August 2018 Pan Pacific Championships Tokyo, Japan
Legend: # – Record awaiting ratification by Japan Swimming Federation; WR – World record; AS – Asian record;
Records not set in finals: h – heat

Short course (25 m)

Men

Event Time Name Club Date Meet Location Ref
50 m freestyle 20.95 Kosuke Matsui NUHW 26 October 2019 Japanese Championships Tokyo, Japan
100 m freestyle 46.22 r Katsumi Nakamura  Japan 11 December 2018 World Championships Hangzhou, China
200 m freestyle 1:41.29 h Katsuhiro Matsumoto  Japan 18 December 2022 World Championships Melbourne, Australia
400 m freestyle 3:37.94 Katsuhiro Matsumoto Central Sports 11 January 2020 Chiba New Year Championships Chiba, Japan
400 m freestyle 3:36.87 not ratified Katsuhiro Matsumoto  Japan 15 December 2022 World Championships Melbourne, Australia
800 m freestyle 7:33.78 AS Shogo Takeda  Japan 17 December 2022 World Championships Melbourne, Australia
1500 m freestyle 14:23.26 Kazushi Imafuku Flat SS 29 March 2025 National Junior Olympic Cup Spring Championships Tokyo, Japan
50 m backstroke 22.81 sf Junya Koga  Japan 8 December 2016 World Championships Windsor, Canada
100 m backstroke 49.65 Masaki Kaneko  Japan 11 August 2017 World Cup Eindhoven, Netherlands
200 m backstroke 1:48.25 AS Masaki Kaneko Yuras 17 January 2016 Tokyo New Year Championships Tokyo, Japan
50m breaststroke 25.91 Yasuhiro Koseki Jieitai 17 October 2021 Japanese Championships Tokyo, Japan
50m breaststroke 25.88 # Taku Taniguchi MEIGI 11 January 2026 JSCA New Year's Festival Championships Hamamatsu, Japan
100m breaststroke 55.77 Yuya Hinomoto Aquatic 16 October 2021 Japanese Championships Tokyo, Japan
200m breaststroke 2:00.35 AS Daiya Seto  Japan 16 December 2022 World Championships Melbourne, Australia
50m butterfly 22.16 tt Hiroto Naito Chukyo University 15 February 2025 JSCA Mie Regional Winter Championships Suzuka, Japan
100m butterfly 49.54 = Takeshi Kawamoto Toyota 18 October 2020 Japanese Championships Tokyo, Japan
100m butterfly 49.54 = Tomonobu Gomi Miki House 19 October 2025 Japanese Championships Tokyo, Japan
200m butterfly 1:46.85 WR Tomoru Honda Nihon University 22 October 2022 Japanese Championships Tokyo, Japan
100m individual medley 51.29 Daiya Seto  Japan 28 October 2021 World Cup Kazan, Russia
200m individual medley 1:50.47 AS Kosuke Hagino  Japan 5 December 2014 World Championships Doha, Qatar
400m individual medley 3:54.81 WR Daiya Seto Energy Standard 20 December 2019 International Swimming League Las Vegas, United States
4×50m freestyle relay 1:23.80 AS
  • Kosuke Matsui
     (21.26)
  • Masahiro Kawane
     (20.79)
  • Takeshi Kawamoto
     (20.79)
  • Katsumi Nakamura
     (20.96)
  Japan 15 December 2022 World Championships Melbourne, Australia
4×100m freestyle relay 3:07.79 AS
  • Katsumi Nakamura
     (47.05)
  • Shinri Shioura
     (46.39)
  • Reo Sakata
     (47.12)
  • Kosuke Hagino
     (47.23)
  Japan 3 December 2014 World Championships Doha, Qatar
4×200m freestyle relay 6:52.04
  • Temma Watanabe
     (1:43.78)
  • Katsuhiro Matsumoto
     (1:40.66)
  • Hidenari Mano
     (1:43.18)
  • Shuya Matsumoto
     (1:44.42)
  Japan 16 December 2022 World Championships Melbourne, Australia
4×50m medley relay 1:31.28 AS
  • Takeshi Kawamoto
     (22.93)
  • Yuya Hinomoto
     (25.64)
  • Yuya Tanaka
     (22.13)
  • Masahiro Kawane
     (20.58)
  Japan 17 December 2022 World Championships Melbourne, Australia
4×100m medley relay 3:21.07 AS
  • Ryosuke Irie
     (49.95)
  • Yasuhiro Koseki
     (55.91)
  • Takeshi Kawamoto
     (49.58)
  • Katsumi Nakamura
     (45.63)
  Japan 16 December 2018 World Championships Hangzhou, China
Legend: # – Record awaiting ratification by Japan Swimming Federation; WR – World record; AS – Asian record;
Records not set in finals: h – heat; sf – semifinal; r – relay 1st leg; rh – relay heat 1st leg; b – B final; † – en route to final mark; tt – time trial

Women

Event Time Name Club Date Meet Location Ref
50 m freestyle 23.95 Rikako Ikee  Japan 21 December 2017 Swim Cup Lausanne Lausanne, Switzerland
100 m freestyle 51.62 Rikako Ikee Renaissance Kameido 14 January 2018 New Year Championships Tokyo, Japan
200 m freestyle 1:52.64 Rikako Ikee Renaissance Kameido 13 January 2018 New Year Championships Tokyo, Japan
400 m freestyle 3:59.41 Chihiro Igarashi  Japan 9 December 2016 World Championships Windsor, Canada
800 m freestyle 8:12.98 Miyu Namba  Japan 14 December 2022 World Championships Melbourne, Australia
1500 m freestyle 15:44.84 Waka Kobori Central Totsuka 14 February 2021 National Junior Olympic Cup Qualifying Meet Yokohama, Japan
50m backstroke 25.95 Mizuki Hirai Tokio Inkarami 18 October 2025 Japanese Championships Tokyo, Japan
100m backstroke 55.23 AS Shiho Sakai  Japan 15 November 2009 World Cup Berlin, Germany
200m backstroke 2:00.18 AS Shiho Sakai  Japan 14 November 2009 World Cup Berlin, Germany
50m breaststroke 29.57 Reona Aoki Tokyo Frog Kings 9 November 2020 International Swimming League Budapest, Hungary
100m breaststroke 1:04.01 Reona Aoki Mizuno 22 October 2022 Japanese Championships Tokyo, Japan
200m breaststroke 2:15.76 AS Rie Kaneto  Japan 9 October 2016 World Cup Doha, Qatar
50m butterfly 24.71 AS Rikako Ikee Renaissance Kameido 13 January 2018 New Year Championships Tokyo, Japan
100m butterfly 55.10 AS Mizuki Hirai ATSC.YW 22 February 2025 Sagamihara City Championships Sagamihara, Japan
200m butterfly 2:02.96 Suzuka Hasegawa Tokyo Dome 14 January 2017 Tokyo New Year Championships Tokyo, Japan
100m individual medley 57.75 Rikako Ikee Renaissance Kameido 15 November 2017 World Cup Tokyo, Japan
200m individual medley 2:03.93 AS Yui Ohashi Tokyo Frog Kings 14 November 2020 International Swimming League Budapest, Hungary
400m individual medley 4:22.73 AS Yui Ohashi Itoman Toshin 10 November 2018 World Cup Tokyo, Japan
4×50m freestyle relay 1:37.35
  • Aya Sato
     (24.46)
  • Runa Imai
     (24.27)
  • Rika Omoto
     (24.07)
  • Tomomi Aoki
     (24.55)
  Japan 16 December 2018 World Championships Hangzhou, China
4×100m freestyle relay 3:31.68
  • Tomomi Aoki
     (53.33)
  • Aya Sato
     (52.60)
  • Runa Imai
     (53.12)
  • Chihiro Igarashi
     (52.63)
  Japan 11 December 2018 World Championships Hangzhou, China
4×200m freestyle relay 7:41.97
  • Tomomi Aoki
     (1:56.49)
  • Chihiro Igarashi
     (1:54.93)
  • Aya Takano
     (1:56.73)
  • Rikako Ikee
     (1:53.82)
  Japan 10 December 2016 World Championships Windsor, Canada
4×50m medley relay 1:44.90
  • Miyuki Takemura
     (26.14)
  • Miho Teramura
     (29.50)
  • Ai Soma
     (25.28)
  • Aya Sato
     (23.98)
  Japan 12 December 2018 World Championships Hangzhou, China
4×100m medley relay 3:50.28
  • Emi Moronuki
     (58.25)
  • Miho Teramura
     (1:03.56)
  • Rikako Ikee
     (55.43)
  • Tomomi Aoki
     (53.04)
  Japan 11 December 2016 World Championships Windsor, Canada
Legend: # – Record awaiting ratification by Japan Swimming Federation; WR – World record; AS – Asian record;
Records not set in finals: h – heat; sf – semifinal; r – relay 1st leg; rh – relay heat 1st leg; b – B final; † – en route to final mark; tt – time trial

Mixed relay

Event Time Name Club Date Meet Location Ref
4×50 m freestyle relay 1:29.51 AS
  • Katsumi Nakamura
     (21.03)
  • Kosuke Matsui
     (20.90)
  • Aya Sato
     (23.62)
  • Runa Imai
     (23.96)
  Japan 12 December 2018 World Championships Hangzhou, China
4×50 m medley relay 1:37.29 AS
  • Kaiya Seki
     (23.04)
  • Taku Taniguchi
     (25.21)
  • Mizuki Hirai
     (25.07)
  • Yume Jinno
     (23.91)
  Japan 11 December 2024 World Championships Budapest, Hungary
4×100 m medley relay 3:37.36 h, AS, not officially ratified
  • Masaki Yura
     (51.23)
  • Taku Taniguchi
     (56.44)
  • Mizuki Hirai
     (56.07)
  • Yume Jinno
     (53.62)
  Japan 14 December 2024 World Championships Budapest, Hungary
Legend: # – Record awaiting ratification by Japan Swimming Federation; AS – Asian record;
Records not set in finals: h – heat

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