Ken (中川健) Nakagawa
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Born : 1983
Cat. M40 Ultrarunner since 2010
30
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
5
Countries visited ?
France
Hong Kong
IcelandJapan
United States
FranceHong KongIcelandJapanUnited States28,5%
Rank quotient ?This runner's calculation uses 31 eligible race(s): Σ(rank − 1) = 5 392; Σ finishers = 18 922. 5 392 / 18 922 × 100 = 28.50%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed31
Km — ultra races3 023 km
> 100 km10
> 160 km4
Longest race162,2 km
17th Shinetsu Five Mountains Trail 100 mile — 13/9/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road12,5%
Trail84,2%
Ult.Walk3,3%
HISTORY
31 race(s)| Runner | Races in common |
|---|---|