Masaki (今井昌生) Imai
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Born : 1978
Cat. W45 Ultrarunner since 2013
22
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
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
Japan68,5%
Rank quotient ?This runner's calculation uses 22 eligible race(s): Σ(rank − 1) = 5 239; Σ finishers = 7 645. 5 239 / 7 645 × 100 = 68.53%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed25
Km — ultra races2 869 km
> 100 km7
> 160 km3
> 200 km3
> 24h1
Longest race516,0 km
21st River Road Foot Race 516 km — 30/4/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road87,7%
Stage12,3%
Wins & podiums (ultra)
🏆 Win0
🏆 Win F1
🏅 Top 30
🏅 Top 3 F1
Longest winning streak0
Current streak0
HISTORY
23 race(s) · 4 stage(s) nested| Runner | Races in common |
|---|---|