• Thumbnail for Yasuhiro Koseki
    Yasuhiro Koseki (小関也朱篤, Koseki Yasuhiro, born March 14, 1992) is a Japanese competitive swimmer and breaststroke specialist. He won the 100-meter event...
    7 KB (166 words) - 00:18, 2 August 2024
  • Thumbnail for World record progression 100 metres breaststroke
    (2021). Cameron van der Burgh also swam 55.99 (2009), 56.01 (2018). Yasuhiro Koseki also swam 56.13 (2018), 56.42 (2018). Emre Sakçı also swam 56.25 (2021)...
    58 KB (2,262 words) - 04:20, 13 November 2024
  • Thumbnail for World record progression 200 metres breaststroke
    Gyurta also swam 2:07.28 (2012). Josh Prenot also swam 2:07.28 (2018). Yasuhiro Koseki also swam 2:07.29 (2017). Matthew Fallon also swam 2:07.39 (2024)....
    74 KB (2,139 words) - 22:53, 10 November 2024
  • Tatsumi International Swimming Center. The defending champion was Yasuhiro Koseki of Japan. Prior to this competition, the existing world and Pan Pacific...
    7 KB (239 words) - 08:55, 10 July 2023
  • Thumbnail for World record progression 50 metres breaststroke
    2018 Kazan  Kirill Strelnikov (RUS) 21 November 2021 Kazan 24 25.91  Yasuhiro Koseki (JPN) 17 October 2021 Tokyo 25 25.99  Ian Finnerty (USA) 16 November...
    63 KB (3,531 words) - 13:31, 29 October 2024
  • up the fourth spot in 3:31.30, with Japan's Ryosuke Irie (53.46), Yasuhiro Koseki (58.65), Takuro Fujii (51.56), and Katsumi Nakamura (48.30) following...
    17 KB (888 words) - 20:30, 9 September 2024
  • Thumbnail for Swimming at the 2016 Summer Olympics – Men's 100 metre breaststroke
    fifth-place finish in 59.31, almost a tenth-second margin ahead of Japan's Yasuhiro Koseki (59.37) and his countryman Felipe França Silva (59.38). Swimming on...
    18 KB (770 words) - 12:07, 13 July 2024
  • Thumbnail for Nic Fink
    competitors to swim under 2:10.00 in the final with the other being Yasuhiro Koseki of Japan who won the gold medal. Fink's swims at both championships...
    72 KB (4,773 words) - 23:16, 16 September 2024
  • Tatsumi International Swimming Center. The defending champion was Yasuhiro Koseki of Japan. Prior to this competition, the existing world and Pan Pacific...
    7 KB (239 words) - 09:01, 10 July 2023
  • narrowly missing on a podium by eight-hundredths of a second. Japan's Yasuhiro Koseki seized a comfortable lead throughout the majority of the race but slipped...
    16 KB (673 words) - 02:45, 18 July 2024