Masaharu (五十嵐勝治) Igarashi
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16
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
2
Countries visited ?
Japan
United States
2,0%
Rank quotient ?This runner's calculation uses 16 eligible race(s): Σ(rank − 1) = 141; Σ finishers = 6 961. 141 / 6 961 × 100 = 2.03%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed16
Km — ultra races1 435 km
> 100 km4
> 160 km3
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)
Road12,0%
Trail88,0%
Wins & podiums (ultra)
🏆 Win3
🏆 Win M3
🏅 Top 36
🏅 Top 3 M6
Longest winning streak1
Current streak0
HISTORY
16 race(s)| 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 | 15/7/2017 | 10th OSJ Ontake 100 Mile Ultra Trail | 160,93 | ×4 |
| ✓ 3 | 16/7/2016 | 9th OSJ Ontake 100 Mile Ultra Trail | 160,93 | ×4 |
| ✓ 4 | 22/9/2015 | 7th Shinetsu Five Mountains Trail 110km | 110,00 | ×3 |
| ✓ 5 | 21/5/2017 | 23rd Yatsugatake Nobeyama 100 km | 100,00 | ×3 |
| ✓ 6 | 22/5/2016 | 22nd Yatsugatake Nobeyama 100 km | 100,00 | ×3 |
| ✓ 7 | 17/5/2015 | 21st Yatsugatake Nobeyama 100 km | 100,00 | ×3 |
| ✓ 8 | 19/7/2014 | 7th OSJ Ontake 100km Ultra Trail | 100,00 | ×3 |
| ✓ 9 | 7/12/2013 | EnteRun 6 hour race Winter | 76,80 | ×2 |
| ✓ 10 | 24/4/2016 | 2nd Okumikawa Power Trail | 70,00 | ×2 |
| ✓ 11 | 13/11/2016 | 8th Kanna Mountain Run II | 50,00 | ×1 |
| ✓ 12 | 13/2/2016 | 7th OSJ Jungle Trail 50K Amami | 50,00 | ×1 |
| ✓ 13 | 8/2/2015 | 6th OSJ Jungle Trail 50K Amami | 50,00 | ×1 |
| ✓ 14 | 31/5/2014 | 6th OSJ Okukuji Trail 50k | 50,00 | ×1 |
| ✓ 15 | 19/4/2014 | 9h Saipan Marathon | 50,00 | ×1 |
| ✓ 16 | 10/6/2017 | 16. Green Charity Marathon Tokyo - Night Run 12H | 45,11 | ×1 |