Koki (保坂行輝) Hosaka
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Born : 1980
Cat. M45 Ultrarunner since 2014
14
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
Japan26,2%
Rank quotient ?This runner's calculation uses 14 eligible race(s): Σ(rank − 1) = 3 080; Σ finishers = 11 755. 3 080 / 11 755 × 100 = 26.20%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed14
Km — ultra races1 297 km
> 100 km3
> 160 km1
Longest race160,9 km
10th Shinetsu Five Mountains Trail 100 mile — 15/9/2018
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road46,2%
Trail53,8%
HISTORY
14 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2024 | ||||
| 20.05 | 100km | 3rd Hirosaki 100 km Ultra Run |
10:55:24 h | 18 |
| 2023 | ||||
| 21.05 | 100km | 11th Tokyo Shibamata 100 km |
12:43:41 h | 413 |
| 2019 | ||||
| 19.05 | 100km | 7th Tokyo Shibamata 100 km |
12:06:13 h | 588 |
| 2018 | ||||
| 15.09 | 100mi | 10th Shinetsu Five Mountains Trail 100 mile |
27:59:33 h | 86 |
| 03.06 | 100km | 6th Tokyo Shibamata 100 km |
10:40:09 h | 179 |
| 12.05 | 108.7km | 2nd Aso Round Trail |
20:25:37 h | 50 |
| 2017 | ||||
| 25.06 | 72.7km | 4. Spatrail - Shima to Kusatsu |
10:31:47 h | 181 |
| 04.06 | 100km | 5th Tokyo Shibamata 100 km |
11:21:38 h | 450 |
| 23.04 | 70km | 3rd Okumikawa Power Trail |
10:55:06 h | 119 |
| 2016 | ||||
| 26.06 | 100km | 31. Lake Saroma 100 km Ultramarathon |
9:52:03 h | 460 |
| 2015 | ||||
| 22.09 | 110km | 7th Shinetsu Five Mountains Trail 110km |
16:46:16 h | 146 |
| 13.09 | 53km | 5th Hakuba Int. Trail Run |
6:52:03 h | 98 |
| 15.03 | 72km | 2nd Izu Trail Journey |
10:15:08 h | 182 |
| 2014 | ||||
| 07.09 | 50km | 7th OSJ Adatara Trail 50K |
10:45:06 h | 124 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 15/9/2018 | 10th Shinetsu Five Mountains Trail 100 mile | 160,93 | ×4 |
| ✓ 2 | 22/9/2015 | 7th Shinetsu Five Mountains Trail 110km | 110,00 | ×3 |
| ✓ 3 | 12/5/2018 | 2nd Aso Round Trail | 108,70 | ×3 |
| ✓ 4 | 20/5/2024 | 3rd Hirosaki 100 km Ultra Run | 100,00 | ×3 |
| ✓ 5 | 21/5/2023 | 11th Tokyo Shibamata 100 km | 100,00 | ×3 |
| ✓ 6 | 19/5/2019 | 7th Tokyo Shibamata 100 km | 100,00 | ×3 |
| ✓ 7 | 3/6/2018 | 6th Tokyo Shibamata 100 km | 100,00 | ×3 |
| ✓ 8 | 4/6/2017 | 5th Tokyo Shibamata 100 km | 100,00 | ×3 |
| ✓ 9 | 26/6/2016 | 31. Lake Saroma 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 10 | 25/6/2017 | 4. Spatrail - Shima to Kusatsu | 72,70 | ×2 |
| ✓ 11 | 15/3/2015 | 2nd Izu Trail Journey | 72,00 | ×2 |
| ✓ 12 | 23/4/2017 | 3rd Okumikawa Power Trail | 70,00 | ×2 |
| ✓ 13 | 13/9/2015 | 5th Hakuba Int. Trail Run | 53,00 | ×1 |
| ✓ 14 | 7/9/2014 | 7th OSJ Adatara Trail 50K | 50,00 | ×1 |