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| Name: | Koseki, Masamune | 小関将宗 |
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| Club: | |||
| Residence: | Iwate Pref. | ||
| Year of birth: | 1986 | (Cat. german: M40) | |
| Date of birth: | 00.00.0000 | (Cat. internat.: M35) | |
| Nationality: | JPN  |
Japan | |
| RunnerID: | 2010506 | ||
3 search results (3 Events, 250 km). (More)
| 2025 | 1 Event, 100 km (More) | ||||
|---|---|---|---|---|---|
| 08.06.2025 | Iwate Ginga 100km Marathon Challenge (JPN) | 100km | |||
| 9:14:05 h | Koseki, Masamune | *Iwate Pref. | Overall: 27 | M: 26 | Cat M35: 6 |
| 2024 | 1 Event, 100 km (More) | ||||
| 09.06.2024 | Iwate Ginga 100km Marathon Challenge (JPN) | 100km | |||
| 11:20:00 h | Koseki, Masamune | *Iwate Pref. | Overall: 185 | M: 162 | Cat M35: 21 |
| 2023 | 1 Event, 50 km (More) | ||||
| 11.06.2023 | Iwate Ginga 50km Marathon Challenge (JPN) | 50km | |||
| 4:25:05 h | Koseki, Masamune | *Iwate Pref. | Overall: 13 | M: 11 | Cat M35: 2 |
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 | 2023 |
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Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2024 | 2023 | ||
|---|---|---|---|---|
| Iwate Ginga 100km Marathon Challenge | 2 | 9:14:05 | 11:20:00 |