Yusuke (小柴雄祐) Koshiba
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Born : 1982
Cat. M40 Ultrarunner since 2016
15
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
32
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
2
Countries visited ?
Hong KongJapan
Hong KongJapan65,3%
Rank quotient ?This runner's calculation uses 15 eligible race(s): Σ(rank − 1) = 9 126; Σ finishers = 13 985. 9 126 / 13 985 × 100 = 65.26%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed15
Km — ultra races1 213 km
> 100 km2
> 160 km2
Longest race167,0 km
7th Ultra-Trail Mt. Fuji (UTMF) — 22/4/2022
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road12,9%
Trail87,1%
HISTORY
15 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 14.12 | 70km | 12th Izu Trail Journey |
11:44:16 h | 431 |
| 2024 | ||||
| 01.12 | 50km | 11th Trainic world Soto-Chichibu Trail Run 50km |
8:20:28 h | 62 |
| 2023 | ||||
| 05.11 | 50km | 7th Koshu Alps Lily Route Challenge |
9:59:50 h | 41 |
| 2022 | ||||
| 17.09 | 162.6km | 14th Shinetsu Five Mountains Trail 100 mile |
32:56:43 h | 215 |
| 22.04 | 167km | 7th Ultra-Trail Mt. Fuji |
34:08:09 h | 519 |
| 2021 | ||||
| 14.11 | 56km | 6th Nikko National Park Mountain Running |
5:51:51 h | 36 |
| 2020 | ||||
| 13.12 | 66km | 7th Izu Trail Journey |
9:49:40 h | 347 |
| 2019 | ||||
| 21.09 | 75km | 6th SkyView Ultra-Trail 70 - Yamada Noboru Memorial Cup |
16:45:35 h | 194 |
| 07.04 | 70km | 5th Okumikawa Power Trail |
13:17:22 h | 504 |
| 2018 | ||||
| 14.10 | 50km | 12th Madarao Forest Trails 50km |
7:26:03 h | 169 |
| 20.05 | 100km | 24th Yatsugatake Nobeyama 100 km |
13:32:32 h | 1086 |
| 2017 | ||||
| 10.12 | 71.7km | 4th Izu Trail Journey |
13:33:51 h | 1030 |
| 17.11 | 100km | 36th Oxfam Trailwalker Hong Kong |
38:19:28 h | 3671 |
| 25.06 | 72.7km | 4. Spatrail - Shima to Kusatsu |
12:29:49 h | 577 |
| 2016 | ||||
| 19.11 | 52km | 2nd FunTrails50K Two Lakes&Green line |
9:53:03 h | 259 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 22/4/2022 | 7th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×5 |
| ✓ 2 | 17/9/2022 | 14th Shinetsu Five Mountains Trail 100 mile | 162,60 | ×5 |
| ✓ 3 | 20/5/2018 | 24th Yatsugatake Nobeyama 100 km | 100,00 | ×3 |
| ✓ 4 | 17/11/2017 | 36th Oxfam Trailwalker Hong Kong | 100,00 | ×3 |
| ✓ 5 | 21/9/2019 | 6th SkyView Ultra-Trail 70 - Yamada Noboru Memorial Cup | 75,00 | ×2 |
| ✓ 6 | 25/6/2017 | 4. Spatrail - Shima to Kusatsu | 72,70 | ×2 |
| ✓ 7 | 10/12/2017 | 4th Izu Trail Journey | 71,70 | ×2 |
| ✓ 8 | 14/12/2025 | 12th Izu Trail Journey | 70,00 | ×2 |
| ✓ 9 | 7/4/2019 | 5th Okumikawa Power Trail | 70,00 | ×2 |
| ✓ 10 | 13/12/2020 | 7th Izu Trail Journey | 66,00 | ×2 |
| ✓ 11 | 14/11/2021 | 6th Nikko National Park Mountain Running | 56,00 | ×1 |
| ✓ 12 | 19/11/2016 | 2nd FunTrails50K Two Lakes&Green line | 52,00 | ×1 |
| ✓ 13 | 1/12/2024 | 11th Trainic world Soto-Chichibu Trail Run 50km | 50,00 | ×1 |
| ✓ 14 | 5/11/2023 | 7th Koshu Alps Lily Route Challenge | 50,00 | ×1 |
| ✓ 15 | 14/10/2018 | 12th Madarao Forest Trails 50km | 50,00 | ×1 |