On 13 June 2026, Haru Hiraki (Japan) ran their 400 metres hurdles in 57.79 seconds at Nagoya (Japan Championships).
| 19.93 |
| 7.61 |
15 R |
R |
| H5 | 4.85(+0.25) | 24.78 | 7.22 | 15 R | R |
| H6 | 5.00(+0.15) | 29.78 | 7.00 | 15 R | R |
| H7 | 5.09(+0.09) | 34.87 | 6.88 | 15 R | R |
| H8 | 5.22(+0.13) | 40.09 | 6.70 | 15 R | R |
| H9 | 5.46(+0.24) | 45.55 | 6.41 | 16 L | L |
| H10 | 5.66(+0.20) | 51.21 | 6.18 | 16 R | R |
| Finish | 6.58 | 57.79 | 6.08 | — — | — |
Avg. interval
4.96s
Std. deviation
0.43
Deceleration
Stride pattern
Fastest interval: 4.32s (H2–H3).
Deceleration of 12.8% between the first half (7.47 m/s) and the second half (6.51 m/s).
Steady stride pattern.
Lead leg alternation: 1× Left, 9× Right.