Masashi (久保田雅志) Kubota
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Born : 1962
Cat. M60 Ultrarunner since 2013
7
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
21
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
Japan42,7%
Rank quotient ?This runner's calculation uses 7 eligible race(s): Σ(rank − 1) = 919; Σ finishers = 2 154. 919 / 2 154 × 100 = 42.66%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed7
Km — ultra races525 km
> 100 km1
Longest race118,0 km
1st Fuji 5 Lakes 118 km Autumn Challenge — 7/10/2019
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road63,8%
Trail36,2%
HISTORY
7 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2022 | ||||
| 09.10 | 100km | 14th Echigo Kubikino 100km Ultramarathon |
12:00:55 h | 340 |
| 2021 | ||||
| 28.08 | 75km | 1st Okushinano 100 - 75 km |
12:03:15 h | 143 |
| 2019 | ||||
| 07.10 | 118km | 1st Fuji 5 Lakes 118 km Autumn Challenge |
14:35:29 h | 129 |
| 13.07 | 65km | 10th Nozawa Onsen 4100D Mountain Trail |
12:34:11 h | 200 |
| 09.06 | 50km | 12th Skyline Trail Sugadaira |
7:20:45 h | 68 |
| 2013 | ||||
| 15.06 | 6h | 12. Tokyo Challenge 6 hours |
52.670 km | 34 |
| 11.05 | 6h | EnteRun 6 hour race Spring |
64.400 km | 12 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 7/10/2019 | 1st Fuji 5 Lakes 118 km Autumn Challenge | 118,00 | ×5 |
| ✓ 2 | 9/10/2022 | 14th Echigo Kubikino 100km Ultramarathon | 100,00 | ×4 |
| ✓ 3 | 28/8/2021 | 1st Okushinano 100 - 75 km | 75,00 | ×3 |
| ✓ 4 | 13/7/2019 | 10th Nozawa Onsen 4100D Mountain Trail | 65,00 | ×3 |
| ✓ 5 | 11/5/2013 | EnteRun 6 hour race Spring | 64,40 | ×3 |
| ✓ 6 | 15/6/2013 | 12. Tokyo Challenge 6 hours | 52,67 | ×2 |
| ✓ 7 | 9/6/2019 | 12th Skyline Trail Sugadaira | 50,00 | ×2 |