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| Name: | Iwai, Kozue | 岩井梢 |
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| Club: | Kitakyushu URC | ||
| Residence: | Fukuoka Pref. | ||
| Year of birth: | 1976 | (Cat. german: W50) | |
| Date of birth: | 03.08.1976 | (Cat. internat.: W45) | |
| Nationality: | JPN  |
Japan | |
| RunnerID: | 103390 | ||
34 search results (34 Events, 4697.166 km). (More)
| 2025 | 1 Event, 53.7 km (More) | ||||
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| 01.06.2025 | Rishiri Island Ultra Marathon (JPN) | 53.7km | |||
| 9:25:30 h | Iwai, Kozue | 北九州urc・九州爆走女 | Overall: 355 | F: 112 | Cat W45: 6 |
| 2024 | 1 Event, 100 km (More) | ||||
| 06.-07.04.2024 | Lake Biwa Kaizu Sakura Maranic - 100 km (JPN) | 100km | |||
| 19:04:00 h | Iwai, Kozue | Overall: 20 | F: 9 | Cat W45: 1 | |
| 2022 | 1 Event, 65 km (More) | ||||
| 17.07.2022 | Yamaguchi Hagi Return (JPN) | 65km | |||
| 13:37:07 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 269 | F: 70 | Cat W45: 11 |
| 2019 | 1 Event, 60 km (More) | ||||
| 02.06.2019 | Osakikamijima Ultra Marthon - 60 km (JPN) | 60km | |||
| 9:30:29 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 59 | F: 15 | Cat W40: 3 |
| 2017 | 4 Events, 500 km (More) | ||||
| 04.06.2017 | Osakikamijima Ultra Marthon - 70 km (JPN) | 70km | |||
| 9:22:19 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 40 | F: 6 | Cat W40: 1 |
| 04.05.2017 | Nagasaki Tachibana Gulf Coast Super Maranic 80 (JPN) | 80km | |||
| 11:07:12 h | Iwai, Kozue | Overall: 57 | F: 10 | Cat W40: 4 | |
| 02.-04.05.2017 | Yamaguchi 100 Hagi-O-Kan Maranic 250 km (JPN) | 250km | |||
| 40:46:45 h | Iwai, Kozue | 北九州URC | Overall: 35 | F: 4 | Cat W40: 2 |
| 08.01.2017 | Yakushima Ultramarathon (JPN) | 100km | |||
| 14:38:00 h | Iwai, Kozue | Overall: 73 | F: 25 | Cat W40: 3 | |
| 2016 | 5 Events, 883.666 km (More) | ||||
| 17.-18.12.2016 | Jingu Gaien 24 Hour Challenge (JPN) | 24h | |||
| 184.666 km | Iwai, Kozue | Overall: 44 | F: 7 | Cat W40: 4 | |
| 04.-05.11.2016 | Tachibana Bay Coast 100 Ultra Marathon (JPN) | 103km | |||
| 14:51:36 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 83 | F: 10 | Cat W40: 3 |
| 30.09.-01.10.2016 | Spartathlon (GRE) | 246km | |||
| 35:40:35 h | Iwai, Kozue | Overall: 214 | F: 32 | Cat W40: 11 | |
| 02.-04.05.2016 | Yamaguchi 100 Hagi-O-Kan Maranic 250 km (JPN) | 250km | |||
| 39:11:09 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 21 | F: 2 | Cat W35: 1 |
| 09.01.2016 | Yakushima Ultramarathon (JPN) | 100km | |||
| 13:13:16 h | Iwai, Kozue | Overall: 12 | F: 2 | Cat W35: 1 | |
| 2015 | 7 Events, 1072.3 km (More) | ||||
| 20.-23.11.2015 | Tachibana Bay Coast 273 Ultra Marathon (JPN) | 276km | |||
| 2d 00:09:58 h | Iwai, Kozue | Overall: 12 | F: 3 | Cat W35: 1 | |
| 18.10.2015 | Mt. Rocco Cannonball Run - 56 Km Speed (JPN) | 56km | |||
| 9:29:00 h | Iwai, Kozue | 九州爆走女 | Overall: 198 | F: 21 | Cat W35: 4 |
| 10.-11.10.2015 | Yukihashi to Beppu 100 km (JPN) | 100km | |||
| 16:59:45 h | Iwai, Kozue | *Kasuga, Fukuoka Pref. | Overall: 268 | F: 21 | Cat W35: 3 |
| 01.-02.08.2015 | 24-hour relay & solo marathon Kobe (JPN) | 24h | |||
| 117.300 km | Iwai, Kozue | Overall: 37 | F: 9 | Cat W35: 2 | |
| 06.06.2015 | Aso Caldera Super Marathon 100 km (JPN) | 100km | |||
| 11:56:51 h | Iwai, Kozue | Overall: 417 | F: 34 | Cat W35: 3 | |
| 04.-05.05.2015 | Nagasaki Tachibana Gulf Coast Super Maranic 173 (JPN) | 173km | |||
| 25:19:13 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 31 | F: 4 | Cat W35: 3 |
| 18.-20.04.2015 | Sakura Michi Kokusai Nature Run (JPN) | 250km | |||
| 34:00:45 h | Iwai, Kozue | Overall: 57 | F: 6 | Cat W35: 1 | |
| 2014 | 6 Events, 751 km (More) | ||||
| 22.-23.11.2014 | Tachibana Bay Coast 100 Ultra Marathon (JPN) | 103km | |||
| 12:01:14 h | Iwai, Kozue | Overall: 15 | F: 4 | Cat W35: 3 | |
| 11.-12.10.2014 | Yukihashi to Beppu 100 km (JPN) | 100km | |||
| 17:29:15 h | Iwai, Kozue | *Kasuga, Fukuoka Pref. | Overall: 290 | F: 26 | Cat W35: 3 |
| 14.-15.09.2014 | Shinetsu Five Mountains Trail 110km (JPN) | 110km | |||
| 18:41:58 h | Iwai, Kozue | Overall: 206 | F: 32 | Cat W35: 8 | |
| 04.05.2014 | Nagasaki Tachibana Gulf Coast Super Maranic 80 (JPN) | 80km | |||
| 11:09:03 h | Iwai, Kozue | Overall: 69 | F: 11 | Cat W35: 2 | |
| 02.-04.05.2014 | Yamaguchi 100 Hagi-O-Kan Maranic 250 km (JPN) | 250km | |||
| 41:35:13 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 55 | F: 3 | Cat W35: 1 |
| 20.04.2014 | Fuji 5 Lakes 108 km Challenge (JPN) | 108km | |||
| 11:55:40 h | Iwai, Kozue | 北九州URC | Overall: 128 | F: 5 | Cat W35: 2 |
| 2012 | 2 Events, 350 km (More) | ||||
| 21.10.2012 | River Shimanto 100km (JPN) | 100km | |||
| 12:20:00 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 471 | F: 53 | Cat W35: 13 |
| 02.-04.05.2012 | Yamaguchi 100 Hagi-O-Kan Maranic 250 km (JPN) | 250km | |||
| 41:34:57 h | Iwai, Kozue | Kitakyushu URC | Overall: 47 | F: 5 | Cat W35: 2 |
| 2011 | 2 Events, 350 km (More) | ||||
| 16.10.2011 | River Shimanto 100km (JPN) | 100km | |||
| 12:00:01 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 406 | F: 57 | Cat W35: 14 |
| 02.-04.05.2011 | Yamaguchi 100 Hagi-O-Kan Maranic 250 km (JPN) | 250km | |||
| 39:11:29 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 20 | F: 2 | Cat W23: 1 |
| 2010 | 2 Events, 321.5 km (More) | ||||
| 10.-11.10.2010 | Hasetsune Cup - Japan Mountain Endurance Race (JPN) | 71.5km | |||
| 20:49:15 h | Iwai, Kozue | Overall: 1316 | F: 117 | Cat W23: 28 | |
| 02.-04.05.2010 | Yamaguchi 100 Hagi-O-Kan Maranic 250 km (JPN) | 250km | |||
| 44:22:15 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 62 | F: 7 | Cat W23: 1 |
| 2009 | 2 Events, 190 km (More) | ||||
| 03.-04.05.2009 | Yamaguchi 100 Hagi-O-Kan Maranic 140 km (JPN) | 140km | |||
| 20:51:28 h | Iwai, Kozue | *Fukuoka | Overall: 85 | F: 7 | Cat W23: 3 |
| 08.02.2009 | OSJ Jungle Trail 50K Amami (JPN) | 50km | |||
| 6:29:36 h | Iwai, Kozue | *Fukuoka Pref. | Overall: 98 | F: 14 | Cat W23: 8 |
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 | 2022 | 2019 | 2017 | 2016 | 2015 | 2014 | 2012 | 2011 | 2010 | 2009 | |
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| 100km | 12:00:01 |
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12:20:00
(698/252) |
12:00:01
(589/201) |
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| 24h | 184.666 |
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184.666
(120/8) |
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Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2024 | 2022 | 2019 | 2017 | 2016 | 2015 | 2014 | 2012 | 2011 | 2010 | 2009 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yamaguchi 100 Hagi-O-Kan Maranic 250 km | 6 | 40:46:45 | 39:11:09 | 41:35:13 | 41:34:57 | 39:11:29 | 44:22:15 | ||||||
| Yukihashi to Beppu 100 km | 2 | 16:59:45 | 17:29:15 | ||||||||||
| Yakushima Ultramarathon | 2 | 14:38:00 | 13:13:16 | ||||||||||
| Nagasaki Tachibana Gulf Coast Super Maranic 80 | 2 | 11:07:12 | 11:09:03 | ||||||||||
| Tachibana Bay Coast 100 Ultra Marathon | 2 | 14:51:36 | 12:01:14 | ||||||||||
| River Shimanto 100km | 2 | 12:20:00 | 12:00:01 |