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| Name: | Obara, Masatoshi | 小原将寿 |
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| Club: | Answer4 | ||
| Residence: | Machida | ||
| Year of birth: | 1982 | (Cat. german: M40) | |
| Date of birth: | 08.06.1982 | (Cat. internat.: M40) | |
| Nationality: | JPN  |
Japan | |
| RunnerID: | 174042 | ||
54 search results (54 Events, 5709.204 km). (More)
| 2025 | 3 Events, 488.868 km (More) | ||||
|---|---|---|---|---|---|
| 05.-07.12.2025 | Chiangmai Thailand by UTMB - CHIANG DAO 100 (THA) | 100mi | |||
| 21:58:16 h | Obara, Masatoshi | Answer4 | Overall: 3 | M: 3 | Cat M40: 1 |
| 13.-15.09.2025 | Shinetsu Five Mountains Trail 100 mile (JPN) | 100mi | |||
| 19:52:07 h | Obara, Masatoshi | Overall: 1 | M: 1 | Cat M40: 1 | |
| 25.-26.04.2025 | Ultra-Trail Mt. Fuji (UTMF) (JPN) | 167km | |||
| 20:59:51 h | Obara, Masatoshi | Answer4 | Overall: 8 | M: 8 | Cat M40: 3 |
| 2024 | 3 Events, 171.5 km (More) | ||||
| 16.11.2024 | FunTrails50K Round (JPN) | 50km | |||
| 5:38:34 h | Obara, Masatoshi | *Tokyo | Overall: 1 | M: 1 | Cat M40: 1 |
| 13.-14.10.2024 | Hasetsune Cup - Japan Mountain Endurance Race (JPN) | 71.5km | |||
| 8:30:20 h | Obara, Masatoshi | Answer4 | Overall: 15 | M: 15 | Cat M40: 3 |
| 08.06.2024 | Okushinano 100 - 50 km (JPN) | 50km | |||
| 5:10:45 h | Obara, Masatoshi | Answer4 | Overall: 5 | M: 5 | Cat M40: 3 |
| 2023 | 4 Events, 471.868 km (More) | ||||
| 16.-18.09.2023 | Shinetsu Five Mountains Trail 100 mile (JPN) | 100mi | |||
| 19:03:31 h | Obara, Masatoshi | Answer4 | Overall: 1 | M: 1 | Cat M40: 1 |
| 25.06.2023 | Lake Saroma 100 Km Ultramarathon (JPN) | 100km | |||
| 7:05:14 h | Obara, Masatoshi | Overall: 6 | M: 6 | Cat M40: 2 | |
| 11.06.2023 | Sapporo Teine Trail (JPN) | 50km | |||
| 5:21:21 h | Obara, Masatoshi | Overall: 1 | M: 1 | Cat M40: 1 | |
| 20.-21.05.2023 | Trainic World 100 Mile in Sai-No-Kuni (JPN) | 100mi | |||
| 23:55:26 h | Obara, Masatoshi | Answer4 | Overall: 1 | M: 1 | Cat M40: 1 |
| 2022 | 3 Events, 413 km (More) | ||||
| 09.-11.10.2022 | Hasetsune Cup - Japan Mountain Endurance Race (JPN) | 143km | |||
| 20:38:13 h | Obara, Masatoshi | Answer4 | Overall: 1 | M: 1 | Cat M40: 1 |
| 26.08.2022 | Ultra Trail Tour du Mont Blanc (UTMB) (FRA) | 170km | |||
| 28:44:57 h | Obara, Masatoshi | Answer4 | Overall: 115 | M: 103 | Cat M40: 25 |
| 11.-12.06.2022 | Okushinano 100 (JPN) | 100km | |||
| 10:32:37 h | Obara, Masatoshi | Answer4 | Overall: 1 | M: 1 | Cat M40: 1 |
| 2021 | 2 Events, 144.1 km (More) | ||||
| 12.12.2021 | Izu Trail Journey (JPN) | 69.1km | |||
| 6:29:28 h | Obara, Masatoshi | Answer4 | Overall: 7 | M: 7 | Cat M35: 2 |
| 28.08.2021 | Okushinano 100 - 75 km (JPN) | 75km | |||
| 7:36:04 h | Obara, Masatoshi | Answer4 | Overall: 3 | M: 3 | Cat M35: 2 |
| 2019 | 2 Events, 338 km (More) | ||||
| 30.08.-01.09.2019 | Ultra Trail Tour du Mont Blanc (UTMB) (FRA) | 171km | |||
| 23:00:12 h | Obara, Masatoshi | Answer4 | Overall: 8 | M: 8 | Cat M35: 3 |
| 26.-28.04.2019 | Ultra-Trail Mt. Fuji (UTMF) (JPN) | 167km | |||
| 20:59:24 h | Obara, Masatoshi | Answer4 | Overall: 4 | M: 4 | Cat M35: 1 |
| 2018 | 3 Events, 321.5 km (More) | ||||
| 07.-08.10.2018 | Hasetsune Cup - Japan Mountain Endurance Race (JPN) | 71.5km | |||
| 8:54:31 h | Obara, Masatoshi | Answer4 | Overall: 4 | M: 4 | Cat M35: 3 |
| 22.07.2018 | Mt. Taisetsu Trail Journey (JPN) | 80km | |||
| 7:38:03 h | Obara, Masatoshi | Overall: 1 | M: 1 | Cat M35: 1 | |
| 27.-29.04.2018 | Ultra-Trail Mt. Fuji (UTMF) (JPN) | 170km | |||
| 21:49:06 h | Obara, Masatoshi | ANSWER4 | Overall: 9 | M: 9 | Cat M35: 4 |
| 2017 | 2 Events, 202 km (More) | ||||
| 16.-18.09.2017 | Shinetsu Five Mountains Trail 100 mile (JPN) | 102km | |||
| 11:20:02 h | Obara, Masatoshi | Answer4 | Overall: 3 | M: 3 | Cat M35: 2 |
| 25.06.2017 | Lake Saroma 100 Km Ultramarathon (JPN) | 100km | |||
| 7:55:10 h | Obara, Masatoshi | 川崎市陸上連盟 | Overall: 31 | M: 28 | Cat M35: 5 |
| 2016 | 5 Events, 496.7 km (More) | ||||
| 11.12.2016 | Izu Trail Journey (JPN) | 71.7km | |||
| 7:04:26 h | Obara, Masatoshi | HOKA ONE ONE | Overall: 4 | M: 4 | Cat M23: 3 |
| 29.10.2016 | IAU Trail WC Trans Peneda-Geres, Braga (POR) | 85km | |||
| 10:17:47 h | Obara, Masatoshi | National team Japan | Overall: 44 | M: 40 | Cat M23: 21 |
| 26.-28.08.2016 | Ultra Trail Tour du Mont Blanc (UTMB) (FRA) | 170km | |||
| 24:39:02 h | Obara, Masatoshi | *Kawasaki-Shi,Kanagawa-Ken | Overall: 16 | M: 16 | Cat M23: 6 |
| 26.06.2016 | Lake Saroma 100 Km Ultramarathon (JPN) | 100km | |||
| 7:28:04 h | Obara, Masatoshi | 川崎市陸上連盟 | Overall: 28 | M: 28 | Cat M23: 16 |
| 24.04.2016 | Okumikawa Power Trail (JPN) | 70km | |||
| 7:20:35 h | Obara, Masatoshi | HOKA | Overall: 1 | M: 1 | Cat M23: 1 |
| 2015 | 5 Events, 533.3 km (More) | ||||
| 25.-27.09.2015 | Ultra-Trail Mt. Fuji (UTMF) (JPN) | 170.3km | |||
| 22:55:33 h | Obara, Masatoshi | Overall: 5 | M: 5 | Cat M23: 1 | |
| 28.06.2015 | Lake Saroma 100 Km Ultramarathon (JPN) | 100km | |||
| 7:08:46 h | Obara, Masatoshi | 川崎市陸上競技協会 | Overall: 12 | M: 12 | Cat M23: 9 |
| 17.05.2015 | Gasando Trail running race (JPN) | 73km | |||
| 6:10:42 h | Obara, Masatoshi | *Yokohama, Kanagawa Pref. | Overall: 1 | M: 1 | Cat M23: 1 |
| 19.04.2015 | Fuji 5 Lakes 118 km Challenge (JPN) | 118km | |||
| 9:38:48 h | Obara, Masatoshi | Overall: 2 | M: 2 | Cat M23: 1 | |
| 15.03.2015 | Izu Trail Journey (JPN) | 72km | |||
| 6:38:35 h | Obara, Masatoshi | Inov08 | Overall: 1 | M: 1 | Cat M23: 1 |
| 2014 | 6 Events, 715.934 km (More) | ||||
| 14.-15.09.2014 | Shinetsu Five Mountains Trail 110km (JPN) | 110km | |||
| 11:14:34 h | Obara, Masatoshi | Overall: 4 | M: 4 | Cat M23: 1 | |
| 29.-31.08.2014 | Ultra Trail Tour du Mont Blanc (UTMB) (FRA) | 168km | |||
| 26:22:29 h | Obara, Masatoshi | Inov-8 | Overall: 46 | M: 41 | Cat M23: 13 |
| 27.07.2014 | Ultramarathon Okumusashi (JPN) | 77km | |||
| 6:04:12 h | Obara, Masatoshi | Mmナイトラン | Overall: 2 | M: 2 | Cat M23: 1 |
| 29.06.2014 | Lake Saroma 100 Km Ultramarathon (JPN) | 100km | |||
| 7:15:49 h | Obara, Masatoshi | inovー8 | Overall: 10 | M: 10 | Cat M23: 7 |
| 18.05.2014 | Yatsugatake Nobeyama 100 km (JPN) | 100km | |||
| 7:54:49 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 3 | M: 3 | Cat M23: 2 |
| 25.-27.04.2014 | Ultra-Trail Mt. Fuji (UTMF) (JPN) | 100mi | |||
| 24:29:05 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 19 | M: 17 | Cat M23: 7 |
| 2013 | 5 Events, 519.434 km (More) | ||||
| 13.-14.10.2013 | Hasetsune Cup - Japan Mountain Endurance Race (JPN) | 71.5km | |||
| 7:41:21 h | Obara, Masatoshi | Overall: 4 | M: 4 | Cat M23: 3 | |
| 15.-16.09.2013 | Shinetsu Five Mountains Trail 110km (JPN) | 110km | |||
| 11:28:04 h | Obara, Masatoshi | Overall: 4 | M: 4 | Cat M23: 3 | |
| 28.07.2013 | Ultramarathon Okumusashi (JPN) | 77km | |||
| 5:51:10 h | Obara, Masatoshi | Mmナイトラン | Overall: 1 | M: 1 | Cat M23: 1 |
| 30.06.2013 | Lake Saroma 100 Km Ultramarathon (JPN) | 100km | |||
| 7:29:16 h | Obara, Masatoshi | R for L | Overall: 16 | M: 16 | Cat M23: 7 |
| 26.-28.04.2013 | Ultra-Trail Mount Fuji (UTMF) (JPN) | 100mi | |||
| 23:12:49 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 15 | M: 15 | Cat M23: 5 |
| 2012 | 3 Events, 251 km (More) | ||||
| 04.11.2012 | Shinshu-Togakushi Trail Run Race (JPN) | 45km | |||
| 4:37:55 h | Obara, Masatoshi | く っoは ぉ | Overall: 2 | M: 2 | Cat M23: 1 |
| 03.06.2012 | OSJ Okukuji Trail 50k (JPN) | 50km | |||
| 8:24:09 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 16 | M: 15 | Cat M23: 10 |
| 18.-20.05.2012 | Ultra-Trail Mount Fuji (UTMF) (JPN) | 156km | |||
| 25:40:47 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 22 | M: 21 | Cat M23: 11 |
| 2011 | 6 Events, 462 km (More) | ||||
| 25.09.2011 | OSJ Adatara Trail 50K (JPN) | 50km | |||
| 6:05:04 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 7 | M: 7 | Cat M23: 6 |
| 17.07.2011 | OSJ Ontake 100km Ultra Trail (JPN) | 100km | |||
| 9:46:32 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 6 | M: 6 | Cat M23: 3 |
| 03.07.2011 | OSJ Shiga Kogen Trail 50K (JPN) | 50km | |||
| 6:21:36 h | Obara, Masatoshi | Overall: 8 | M: 8 | Cat M23: 7 | |
| 26.06.2011 | Lake Saroma 100 Km Ultramarathon (JPN) | 100km | |||
| 8:26:03 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 55 | M: 45 | Cat M23: 21 |
| 05.06.2011 | OSJ Okukuji Trail 50k (JPN) | 50km | |||
| 7:22:29 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 14 | M: 14 | Cat M23: 6 |
| 30.04.2011 | Fuji 5 Lakes 112 km Challenge (JPN) | 112km | |||
| 10:07:52 h | Obara, Masatoshi | Overall: 14 | M: 13 | Cat M23: 7 | |
| 2010 | 2 Events, 180 km (More) | ||||
| 14.11.2010 | OSJ Hyonosen Mountains Trail Race (JPN) | 80km | |||
| 11:05:21 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 6 | M: 6 | Cat M23: 3 |
| 27.06.2010 | Lake Saroma 100 Km Ultramarathon (JPN) | 100km | |||
| 9:26:51 h | Obara, Masatoshi | *Kanagawa Pref. | Overall: 138 | M: 123 | Cat M23: 38 |
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 | 2022 | 2021 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100km | 7:05:14 |
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7:05:14
(56/11) |
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7:55:10
(156/43) |
7:28:04
(101/31) |
7:08:46
(57/14) |
7:15:49
(53/13) |
7:29:16
(89/21) |
|
8:26:03
(314/61) |
9:26:51
(865/178) |
Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2024 | 2023 | 2022 | 2021 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lake Saroma 100 Km Ultramarathon | 8 | 7:05:14 | 7:55:10 | 7:28:04 | 7:08:46 | 7:15:49 | 7:29:16 | 8:26:03 | 9:26:51 | |||||||
| Ultra-Trail Mount Fuji (UTMF) | 7 | 20:59:51 | 20:59:24 | 21:49:06 | 22:55:33 | 24:29:05 | 23:12:49 | 25:40:47 | ||||||||
| Ultra Trail Tour du Mont Blanc (UTMB) | 4 | 28:44:57 | 23:00:12 | 24:39:02 | 26:22:29 | |||||||||||
| Shinetsu Five Mountains Trail 100 mile | 3 | 19:52:07 | 19:03:31 | 11:20:02 | ||||||||||||
| Izu Trail Journey | 3 | 6:29:28 | 7:04:26 | 6:38:35 | ||||||||||||
| Hasetsune Cup - Japan Mountain Endurance Race | 3 | 8:30:20 | 8:54:31 | 7:41:21 | ||||||||||||
| OSJ Okukuji Trail 50k | 2 | 8:24:09 | 7:22:29 | |||||||||||||
| Shinetsu Five Mountains Trail 110km | 2 | 11:14:34 | 11:28:04 | |||||||||||||
| Ultramarathon Okumusashi | 2 | 6:04:12 | 5:51:10 | |||||||||||||
| Fuji 5 Lakes 112 km Challenge | 2 | 9:38:48 | 10:07:52 |