Run Record Lab
RecordsToolsAbout

Record Timeline

Every record update in this archive, newest first.

DateAthleteCountryTimeLocationType
14 Sept 2025Yuki Joseph NakajimaJapan44.44TokyoJapan Record
20 Aug 2023Kentaro SatoJapan44.77BudapestJapan Record
14 Aug 2016Wayde van NiekerkSouth Africa43.03Rio de JaneiroWorld Record
3 May 2008Asami TannoJapan51.75FukuroiJapan Record
19 Sept 2005Asami TannoJapan51.80YokohamaJapan Record
5 Jun 2005Asami TannoJapan51.93TokyoJapan Record
13 Jun 2004Asami TannoJapan52.88IpohJapan Record
24 May 2001Kazue KakinumaJapan52.95OsakaJapan Record
26 Aug 1999Michael JohnsonUnited States43.18SevilleWorld Record
16 Jun 1991Susumu TakanoJapan44.78TokyoJapan Record
26 Sept 1988Susumu TakanoJapan44.90SeoulJapan Record
17 Aug 1988Butch ReynoldsUnited States43.29ZurichWorld Record
1 Oct 1986Susumu TakanoJapan45.00SeoulJapan Record
7 Jul 1986Susumu TakanoJapan45.21HelsinkiJapan Record
6 Oct 1985Marita KochEast Germany47.60CanberraWorld Record
30 Aug 1985Susumu TakanoJapan45.30KobeJapan Record
14 Sept 1984Susumu TakanoJapan45.69TokyoJapan Record
25 Jul 1984Susumu TakanoJapan45.85WalnutJapan Record
10 Aug 1983Jarmila KratochvilovaCzechoslovakia47.99HelsinkiWorld Record
6 Jul 1983Susumu TakanoJapan45.86EdmontonJapan Record
8 May 1983Susumu TakanoJapan46.23TokyoJapan Record
8 Sept 1982Marita KochEast Germany48.16AthensWorld Record
23 May 1982Junko YoshidaJapan54.06TokyoJapan Record
3 May 1982Susumu TakanoJapan46.51TokyoJapan Record
5 Jun 1981Junko YoshidaJapan54.89TokyoJapan Record
9 Sept 1979Eiji NatoriJapan46.64Mexico CityJapan Record
4 Aug 1979Marita KochEast Germany48.60TurinWorld Record
29 Jul 1979Marita KochEast Germany48.89PotsdamWorld Record
31 Aug 1978Marita KochEast Germany48.94PragueWorld Record
19 Aug 1978Marita KochEast Germany49.03PotsdamWorld Record
2 Jul 1978Marita KochEast Germany49.19LeipzigWorld Record
4 Dec 1977Yasuhiro HaradaJapan46.70CanberraJapan Record
29 Jul 1976Irena SzewinskaPoland49.29MontrealWorld Record
18 Oct 1968Lee EvansUnited States43.86Mexico CityWorld Record