Yoshikazu (福井義和) Fukui
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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
33,9%
Rank quotient ?This runner's calculation uses 14 eligible race(s): Σ(rank − 1) = 3 395; Σ finishers = 10 005. 3 395 / 10 005 × 100 = 33.93%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed14
Km — ultra races1 302 km
> 100 km5
> 160 km2
Longest race167,0 km
9th Ultra-Trail Mt. Fuji (UTMF) — 26/4/2024
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail100,0%
HISTORY
14 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 26/4/2024 | 9th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×5 |
| ✓ 2 | 16/9/2023 | 15th Shinetsu Five Mountains Trail 100 mile | 162,60 | ×4 |
| ✓ 3 | 20/9/2025 | 11th SkyViewTrail Memorial Cup | 130,00 | ×3 |
| ✓ 4 | 16/7/2023 | 15th OSJ Ontake 100km Ultra Trail | 109,20 | ×3 |
| ✓ 5 | 18/9/2022 | 14th Shinetsu Five Mountains Trail 110km | 109,00 | ×3 |
| ✓ 6 | 20/5/2012 | 18th Yatsugatake Nobeyama 100 km | 100,00 | ×3 |
| ✓ 7 | 29/6/2019 | 9th Utsukushigahara 80 km Trail Run | 80,00 | ×2 |
| ✓ 8 | 21/9/2019 | 6th SkyView Ultra-Trail 70 - Yamada Noboru Memorial Cup | 75,00 | ×2 |
| ✓ 9 | 13/10/2013 | 21st Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 10 | 9/10/2011 | 19th Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 11 | 16/12/2018 | Coast to Coast 70k Trail Run | 68,00 | ×2 |
| ✓ 12 | 28/5/2022 | 14th OSJ Okukuji Trail 60k | 59,00 | ×1 |
| ✓ 13 | 27/4/2025 | 18th Ishioka Trail Run | 50,00 | ×1 |
| ✓ 14 | 30/10/2022 | 10th Trainic world Ogose-Tokigawa Trail Run 50km | 49,60 | ×1 |