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| Name: | Iwasa, Koji | 岩佐幸司 |
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| Club: | |||
| Residence: | Osaka Pref. | ||
| Year of birth: | 1973 | (Cat. german: M50) | |
| Date of birth: | 10.10.1973 | (Cat. internat.: M50) | |
| Nationality: | JPN  |
Japan | |
| RunnerID: | 383799 | ||
12 search results (12 Events, 1090 km). (More)
| 2025 | 2 Events, 160 km (More) | ||||
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| 28.09.2025 | Muraoka 100 km Ultra Marathon (JPN) | 100km | |||
| 13:37:36 h | Iwasa, Koji | *Osaka | Overall: 363 | M: 321 | Cat M50: 90 |
| 14.09.2025 | Tango 60 km Ultramarathon (JPN) | 60km | |||
| 6:51:05 h | Iwasa, Koji | Overall: 102 | M: 80 | Cat M50: 9 | |
| 2018 | 1 Event, 100 km (More) | ||||
| 16.09.2018 | Tango 100 km Ultramarathon (JPN) | 100km | |||
| 12:02:44 h | Iwasa, Koji | Overall: 316 | M: 287 | Cat M40: 54 | |
| 2016 | 1 Event, 100 km (More) | ||||
| 16.10.2016 | River Shimanto 100km (JPN) | 100km | |||
| 11:09:24 h | Iwasa, Koji | Overall: 335 | M: 305 | Cat M40: 69 | |
| 2015 | 3 Events, 277 km (More) | ||||
| 20.09.2015 | Tango 100 km Ultramarathon (JPN) | 100km | |||
| 9:45:13 h | Iwasa, Koji | *Osaka Pref. | Overall: 101 | M: 97 | Cat M40: 31 |
| 17.05.2015 | Saba Highway Ultramarathon (JPN) | 77km | |||
| 10:45:48 h | Iwasa, Koji | Overall: 309 | M: 262 | Cat M40: 41 | |
| 26.04.2015 | Okukumano 100 Km Ultramarathon (JPN) | 100km | |||
| 12:30:24 h | Iwasa, Koji | *Osaka Pref. | Overall: 121 | M: 100 | Cat M40: 19 |
| 2014 | 2 Events, 177 km (More) | ||||
| 08.06.2014 | Hida Takayama 100 km Ultramarathon (JPN) | 100km | |||
| 11:46:19 h | Iwasa, Koji | *Osaka Pref. | Overall: 305 | M: 285 | Cat M40: 73 |
| 18.05.2014 | Saba Highway Ultramarathon (JPN) | 77km | |||
| 8:41:57 h | Iwasa, Koji | Overall: 59 | M: 56 | Cat M40: 10 | |
| 2013 | 2 Events, 176 km (More) | ||||
| 15.09.2013 | Tango 100 km Ultramarathon (JPN) | 100km | |||
| 10:11:42 h | Iwasa, Koji | Overall: 118 | M: 112 | Cat M35: 24 | |
| 19.05.2013 | Saba Highway Ultramarathon (JPN) | 76km | |||
| 8:14:58 h | Iwasa, Koji | Overall: 27 | M: 27 | Cat M35: 6 | |
| 2012 | 1 Event, 100 km (More) | ||||
| 21.09.2012 | Tango 100 km Ultramarathon (JPN) | 100km | |||
| 11:04:14 h | Iwasa, Koji | Overall: 108 | M: 101 | Cat M35: 19 | |
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 | 2018 | 2016 | 2015 | 2014 | 2013 | 2012 | |
|---|---|---|---|---|---|---|---|---|
| 100km | 9:45:13 |
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12:02:44
(5025/2344) |
11:09:24
(3337/1576) |
9:45:13
(1562/620) |
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Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2018 | 2016 | 2015 | 2014 | 2013 | 2012 | ||
|---|---|---|---|---|---|---|---|---|
| Tango 100 km Ultramarathon | 4 | 12:02:44 | 9:45:13 | 10:11:42 | 11:04:14 | |||
| Saba Highway Ultramarathon | 3 | 10:45:48 | 8:41:57 | 8:14:58 |