400 m · Japan Record
The detailed progression of the Japanese record.
Men · Japan Record
44.44
Yuki Joseph Nakajima
Japan · Tokyo · 14 Sept 2025
Women · Japan Record
51.75
Asami Tanno
Japan · Fukuroi · 3 May 2008
Men's Japan Record Progression
Current44.44Yuki Joseph Nakajima· 2025
Women's Japan Record Progression
Current51.75Asami Tanno· 2008
Record Timeline
| Date | Athlete | Time | Location |
|---|---|---|---|
| 14 Sept 2025 | Yuki Joseph Nakajima | 44.44 | Tokyo |
| 20 Aug 2023 | Kentaro Sato | 44.77 | Budapest |
| 16 Jun 1991 | Susumu Takano | 44.78 | Tokyo |
| 26 Sept 1988 | Susumu Takano | 44.90 | Seoul |
| 1 Oct 1986 | Susumu Takano | 45.00 | Seoul |
| 7 Jul 1986 | Susumu Takano | 45.21 | Helsinki |
| 30 Aug 1985 | Susumu Takano | 45.30 | Kobe |
| 14 Sept 1984 | Susumu Takano | 45.69 | Tokyo |
| 25 Jul 1984 | Susumu Takano | 45.85 | Walnut |
| 6 Jul 1983 | Susumu Takano | 45.86 | Edmonton |
| 8 May 1983 | Susumu Takano | 46.23 | Tokyo |
| 3 May 1982 | Susumu Takano | 46.51 | Tokyo |
| 9 Sept 1979 | Eiji Natori | 46.64 | Mexico City |
| 4 Dec 1977 | Yasuhiro Harada | 46.70 | Canberra |