Junji (岩波潤史) Iwanami
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Born : 1972
Cat. M50 Ultrarunner since 2015
35
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
2
Countries visited ?Japan
South Korea
JapanSouth Korea5,2%
Rank quotient ?This runner's calculation uses 35 eligible race(s): Σ(rank − 1) = 1 366; Σ finishers = 26 498. 1 366 / 26 498 × 100 = 5.16%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed35
Km — ultra races3 434 km
> 100 km10
> 160 km7
Longest race169,0 km
5th Lake Biwa 100 — 10/10/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road29,3%
Trail70,7%
Wins & podiums (ultra)
🏆 Win1
🏆 Win M1
🏅 Top 33
🏅 Top 3 M3
Longest winning streak1
Current streak0
HISTORY
35 race(s)| Runner | Races in common |
|---|---|