Kazuki (大原一樹) Ohara
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Born : 1967
Cat. M55 Ultrarunner since 2015
15
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
33
DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details
1
Countries visited ?Japan
Japan32,0%
Rank quotient ?This runner's calculation uses 15 eligible race(s): Σ(rank − 1) = 6 352; Σ finishers = 19 861. 6 352 / 19 861 × 100 = 31.98%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed15
Km — ultra races1 383 km
> 100 km2
Longest race118,0 km
34th Fuji 5 Lakes 118 km Challenge — 21/4/2024
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
HISTORY
15 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 14.06 | 100km | 14th Hida Takayama 100 km Ultramarathon |
11:48:29 h | 431 |
| 2025 | ||||
| 18.05 | 100km | 31th Yatsugatake Nobeyama 100 km |
12:44:24 h | 472 |
| 20.04 | 62km | 35th Fuji 3 Lakes 62 km Challenge |
8:18:44 h | 292 |
| 2024 | ||||
| 21.04 | 118km | 34th Fuji 5 Lakes 118 km Challenge |
14:33:00 h | 303 |
| 2023 | ||||
| 04.06 | 78km | 30. Ultramarathon Okumusashi |
8:39:58 h | 163 |
| 16.04 | 118km | 33th Fuji 5 Lakes 118 km Challenge |
14:38:50 h | 304 |
| 2022 | ||||
| 03.07 | 8h | 28th 8-Hour Endurance Race Tokorozawa |
63.700 km | 82 |
| 22.05 | 100km | 28th Yatsugatake Nobeyama 100 km |
12:46:25 h | 426 |
| 2021 | ||||
| 04.07 | 8h | 27th 8-Hour Endurance Race Tokorozawa |
73.500 km | 83 |
| 10.04 | 70km | 16th Toda Saiko 70 km |
7:01:27 h | 170 |
| 2019 | ||||
| 30.06 | 100km | 34. Lake Saroma 100 km Ultramarathon |
10:35:31 h | 583 |
| 2018 | ||||
| 24.06 | 100km | 33. Lake Saroma 100 km Ultramarathon |
10:27:49 h | 578 |
| 2017 | ||||
| 25.06 | 100km | 32. Lake Saroma 100 km Ultramarathon |
11:10:49 h | 760 |
| 2016 | ||||
| 26.06 | 100km | 31. Lake Saroma 100 km Ultramarathon |
10:38:01 h | 724 |
| 2015 | ||||
| 28.06 | 100km | 30. Lake Saroma 100 km Ultramarathon |
11:14:33 h | 996 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 21/4/2024 | 34th Fuji 5 Lakes 118 km Challenge | 118,00 | ×3 |
| ✓ 2 | 16/4/2023 | 33th Fuji 5 Lakes 118 km Challenge | 118,00 | ×3 |
| ✓ 3 | 14/6/2026 | 14th Hida Takayama 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 4 | 18/5/2025 | 31th Yatsugatake Nobeyama 100 km | 100,00 | ×3 |
| ✓ 5 | 22/5/2022 | 28th Yatsugatake Nobeyama 100 km | 100,00 | ×3 |
| ✓ 6 | 30/6/2019 | 34. Lake Saroma 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 7 | 24/6/2018 | 33. Lake Saroma 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 8 | 25/6/2017 | 32. Lake Saroma 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 9 | 26/6/2016 | 31. Lake Saroma 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 10 | 28/6/2015 | 30. Lake Saroma 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 11 | 4/6/2023 | 30. Ultramarathon Okumusashi | 78,00 | ×2 |
| ✓ 12 | 4/7/2021 | 27th 8-Hour Endurance Race Tokorozawa | 73,50 | ×2 |
| ✓ 13 | 10/4/2021 | 16th Toda Saiko 70 km | 70,00 | ×2 |
| ✓ 14 | 3/7/2022 | 28th 8-Hour Endurance Race Tokorozawa | 63,70 | ×1 |
| ✓ 15 | 20/4/2025 | 35th Fuji 3 Lakes 62 km Challenge | 62,00 | ×1 |