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| Name: | Koseki, Yoshihiro | 小関善博 |
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| Club: | 43 ANC | ||
| Residence: | Fukushima Pref. | ||
| Year of birth: | 1975 | (Cat. german: M50) | |
| Date of birth: | 00.00.0000 | (Cat. internat.: M50) | |
| Nationality: | JPN  |
Japan | |
| RunnerID: | 2254723 | ||
4 search results (4 Events, 318.4 km). (More)
| 2025 | 2 Events, 200 km (More) | ||||
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| 05.-06.07.2025 | Shiga Kogen 100 (JPN) | 100km | |||
| 18:52:32 h | Koseki, Yoshihiro | *Fukushima Pref. | Overall: 53 | M: 45 | Cat M45: 9 |
| 07.06.2025 | OSJ Aizu Bandaisan Ultramarathon - 100 km (JPN) | 100km | |||
| 10:18:33 h | Koseki, Yoshihiro | *Fukushima Pref. | Overall: 33 | M: 29 | Cat M45: 11 |
| 2024 | 2 Events, 118.4 km (More) | ||||
| 07.09.2024 | OSJ Adatara Trail 50K (JPN) | 53.4km | |||
| 12:25:01 h | Koseki, Yoshihiro | 43 ANC | Overall: 113 | M: 100 | Cat M45: 21 |
| 15.06.2024 | OSJ Aizu Bandaisan Ultramarathon - 65 km (JPN) | 65km | |||
| 7:59:14 h | Koseki, Yoshihiro | AMC | Overall: 19 | M: 17 | Cat M45: 4 |
Personal bests
Your list of personal best performances only contains performances of races which can be included into rankings.
In brackets rank in yearly international/national rankings.
| PB | 2025 | 2024 |
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