Masahiko (久保正彦) Kubo
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Born : 1969
Cat. M55 Ultrarunner since 2010
50
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
60
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
3
Countries visited ?Japan
Malaysia
Taiwan
JapanMalaysiaTaiwan27,3%
Rank quotient ?This runner's calculation uses 57 eligible race(s): Σ(rank − 1) = 4 484; Σ finishers = 16 425. 4 484 / 16 425 × 100 = 27.30%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed57
Km — ultra races5 359 km
> 100 km19
> 160 km5
> 24h1
Longest race200,0 km
15th Little Edo Oedo 200k — 15/3/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road23,9%
Trail76,1%
Wins & podiums (ultra)
🏆 Win0
🏆 Win M0
🏅 Top 31
🏅 Top 3 M2
Longest winning streak0
Current streak0
HISTORY
57 race(s)| Runner | Races in common |
|---|---|