Kenji (増田研二) Masuda
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13
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
31
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
78,3%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 11 072; Σ finishers = 14 138. 11 072 / 14 138 × 100 = 78.31%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed13
Km — ultra races1 134 km
> 100 km1
Longest race125,0 km
7th Fujisan Issyu Walking — 10/6/2023
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road58,7%
Trail30,2%
Ult.Walk11,0%
Records
HISTORY
13 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 10/6/2023 | 7th Fujisan Issyu Walking | 125,00 | ×4 |
| ✓ 2 | 22/10/2022 | 4th Tsurugashima 100km | 100,00 | ×3 |
| ✓ 3 | 15/7/2017 | 10th OSJ Ontake 100km Ultra Trail | 100,00 | ×3 |
| ✓ 4 | 23/4/2017 | 27th Fuji 5 Lakes 100 km Challenge | 100,00 | ×3 |
| ✓ 5 | 19/7/2014 | 7th OSJ Ontake 100km Ultra Trail | 100,00 | ×3 |
| ✓ 6 | 20/4/2014 | 24th Fuji 5 Lakes 100 km Challenge | 100,00 | ×3 |
| ✓ 7 | 4/6/2017 | 24. Ultramarathon Okumusashi | 78,00 | ×2 |
| ✓ 8 | 5/6/2016 | 23. Ultramarathon Okumusashi | 78,00 | ×2 |
| ✓ 9 | 22/6/2015 | 22. Ultramarathon Okumusashi | 77,00 | ×2 |
| ✓ 10 | 31/10/2015 | 23rd Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 11 | 12/10/2014 | 22nd Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 12 | 19/4/2015 | 25th Fuji 5 Lakes 71 km Challenge | 71,00 | ×2 |
| ✓ 13 | 2/7/2017 | 1st Nikko 62km Ultramarathon | 62,00 | ×2 |