Masaharu (坪田政春) Tsubota
External sources
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Ultrarunner since 2024
20
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
43
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
Japan6,9%
Rank quotient ?This runner's calculation uses 20 eligible race(s): Σ(rank − 1) = 286; Σ finishers = 4 156. 286 / 4 156 × 100 = 6.88%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed20
Km — ultra races2 249 km
> 100 km11
> 160 km2
Longest race200,0 km
9th Ultra Walking around Lake Biwa — 2/5/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road13,6%
Trail9,4%
Ult.Walk77,0%
Wins & podiums (ultra)
🏆 Win0
🏆 Win M0
🏅 Top 31
🏅 Top 3 M1
Longest winning streak0
Current streak0
Records
HISTORY
20 race(s)| Runner | Races in common |
|---|---|