# List of Japanese records in swimming

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 |
| 50m freestyle | 21.67 | sf, AS | Shinri Shioura | Itoman Toshin | 7 April 2019 | Japanese Championships | Tokyo, Japan |
| 100m freestyle | 47.85 | | Katsuhiro Matsumoto | Mitsuuroko | 6 April 2023 | Japanese Championships | Tokyo, Japan |
| 200m freestyle | 1:44.65 | | Katsuhiro Matsumoto | Central Sports | 5 April 2021 | Japanese Championships | Tokyo, Japan |
| 400m freestyle | 3:43.90 | | Kosuke Hagino | Toyo University | 12 April 2014 | Japanese Championships | Tokyo, Japan |
| 800m freestyle | 7:49.55 | | Shui Kurokawa | Itoman Tondabayashi | 7 April 2021 | Japanese Championships | Tokyo, Japan |
| 1500m freestyle | 14:54.80 | | Kohei Yamamoto | Mizuno | 20 June 2014 | Japan Open | 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 | 26.94 | | Yasuhiro Koseki | Japan | 17 June 2018 | Mare Nostrum | Monte Carlo, Monaco |
| 100m breaststroke | 58.78 | | Yasuhiro Koseki | Japan | 17 June 2018 | Mare Nostrum | Monte Carlo, Monaco |
| 200m breaststroke | 2:06.40 | AS | Shoma Sato | Tokyo SC | 7 April 2021 | Japanese Championships | Tokyo, Japan |
| 50m butterfly | 23.13 | h | Takeshi Kawamoto | Toyota | 4 April 2023 | 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 | 1:37.64 | | | | | |
| 4×50m medley relay | 1:36.86 | '#' | Masaki Yura (25.10)Taku Taniguchi (26.75)Kaiya Seki (23.40)Katsumi Nakamura (21.61) | Japan | 17 January 2025 | South Australia State Open & MC Championships | Adelaide, Australia |
| 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 |

### Women

| Event | Time | | Name | Club | Date | Meet | Location |
| 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 | AS | 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 |
| 4×100m 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 |

### Mixed relay

| Event | Time | | Name | Club | Date | Meet | Location |
| 4×50 m freestyle relay | 1:36.79 | '#' | Katsumi NakamuraNaoya ShiotaMio NaritaRuka Takezawa | Japan | 19 January 2025 | South Australia State Open & MC Championships | Adelaide, Australia |
| 4×100 m freestyle relay | 3:24.67 | AS | 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 | '#' | Naoya ShiotaTaku TaniguchiUmi IshizukaRuka Takezawa | Japan | 19 Jaunuary 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 |

## Short course (25 m)
### Men

| Event | Time | | Name | Club | Date | Meet | Location |
| 50m freestyle | 20.95 | | Kosuke Matsui | NUHW | 26 October 2019 | Japanese Championships | Tokyo, Japan |
| 100m freestyle | 46.22 | r | Katsumi Nakamura | Japan | 11 December 2018 | World Championships | Hangzhou, China |
| 200m freestyle | 1:41.29 | h | Katsuhiro Matsumoto | Japan | 18 December 2022 | World Championships | Melbourne, Australia |
| 400m freestyle | 3:37.94 | | Katsuhiro Matsumoto | Central Sports | 11 January 2020 | Chiba New Year Championships | Chiba, Japan |
| 400m freestyle | 3:36.87 | not ratified | Katsuhiro Matsumoto | Japan | 15 December 2022 | World Championships | Melbourne, Australia |
| 800m freestyle | 7:33.78 | AS | Shogo Takeda | Japan | 17 December 2022 | World Championships | Melbourne, Australia |
| 1500m freestyle | 14:25.95 | | Shogo Takeda | Japan | 13 December 2022 | World Championships | Melbourne, Australia |
| 50m backstroke | 22.81 | sf | Junya Koga | Japan | 8 December 2016 | World Championships | Windsor, Canada |
| 100m backstroke | 49.65 | | Masaki Kaneko | Japan | 11 August 2017 | World Cup | Eindhoven, Netherlands |
| 200m backstroke | 1:48.25 | AS | Masaki Kaneko | Yuras | 17 January 2016 | Tokyo New Year Championships | Tokyo, Japan |
| 50m breaststroke | 25.91 | AS | Yasuhiro Koseki | Jieitai | 17 October 2021 | Japanese Championships | Tokyo, Japan |
| 100m breaststroke | 55.77 | AS | 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 | 22.19 | AS | Takeshi Kawamoto | Toyota | 17 October 2020 | Japanese Championships | Tokyo,, Japan |
| 50m butterfly | 22.16 | tt, # | Hiroto Naitou | 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 |
| 200m butterfly | 1:46.85 | WR | Tomoru Honda | Nihon University | 22 October 2022 | Japanese Championships | Tokyo, Japan |
| 100m individual medley | 51.29 | AS | 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 |

### Women

| Event | Time | | Name | Club | Date | Meet | Location |
| 50m freestyle | 23.95 | | Rikako Ikee | Japan | 21 December 2017 | Swim Cup Lausanne | Lausanne, Switzerland |
| 100m freestyle | 51.62 | | Rikako Ikee | Renaissance Kameido | 14 January 2018 | New Year Championships | Tokyo, Japan |
| 200m freestyle | 1:52.64 | | Rikako Ikee | Renaissance Kameido | 13 January 2018 | New Year Championships | Tokyo, Japan |
| 400m freestyle | 3:59.41 | | Chihiro Igarashi | Japan | 9 December 2016 | World Championships | Windsor, Canada |
| 800m freestyle | 8:12.98 | | Miyu Namba | Japan | 14 December 2022 | World Championships | Melbourne, Australia |
| 1500m freestyle | 15:44.84 | AS | Waka Kobori | Central Totsuka | 14 February 2021 | National Junior Olympic Cup Qualifying Meet | Yokohama, Japan |
| 50m backstroke | 26.05 | | Aya Terakawa | Mizuno | 25 February 2013 | 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 | AS | 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 | 55.31 | | Rikako Ikee | Renaissance Kameido | 11 November 2018 | World Cup | 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 | AS | 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 |

### Mixed relay

| Event | Time | | Name | Club | Date | Meet | Location |
| 4×50 m freestyle relay | 1:29.61 | 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 | 1:37.67 | | Miyuki Takemura (26.03)Yasuhiro Koseki (25.64)Takeshi Kawamoto (21.95)Aya Sato (24.05) | Japan | 13 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, # | Masaki Yura (51.23)Taku Taniguchi (56.44)Mizuki Hirai (56.07)Yume Jinno (53.62) | Japan | 14 December 2024 | World Championships | Budapest, Hungary |