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Kosei YAHIRO
400m
 Japan
Born03 JAN 2004 (21)
Kosei's code14959629
Personal bests
resultResult
3:13.34
dateDate
28 SEP 2025
scoreScore
999
competitionCompetition & venue
Hakatanomori Athletic Stadium, Fukuoka (JPN)
resultResult
48.55
dateDate
11 AUG 2023
scoreScore
946
competitionCompetition & venue
Hakatanomori Athletic Stadium, Fukuoka (JPN)
resultResult
22.97
dateDate
07 AUG 2022
scoreScore
797
resultResult
36.39
dateDate
29 OCT 2022
scoreScore
792
competitionCompetition & venue
Kyushu Kyoritsu University Stadium, Kitakyushu (JPN)
* Not legal
Season’s bests (2025)
* Not legal
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