Kazumasa (渡邉一将) Watanabe
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Born : 1985
Cat. M40 Ultrarunner since 2017
4
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
16
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
Japan75,5%
Rank quotient ?This runner's calculation uses 4 eligible race(s): Σ(rank − 1) = 2 883; Σ finishers = 3 817. 2 883 / 3 817 × 100 = 75.53%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed4
Km — ultra races303 km
> 100 km1
Longest race101,0 km
4th Kumagawa Revival Trail — 15/11/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road33,0%
Trail67,0%
Records
HISTORY
4 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 15.11 | 101km | 4th Kumagawa Revival Trail |
19:56:27 h | 36 |
| 06.04 | 52km | 10th Tara Forest Trail |
7:58:27 h | 18 |
| 2024 | ||||
| 15.12 | 50km | 9th Minami-aso caldera Trail |
8:55:52 h | 88 |
| 2017 | ||||
| 07.10 | 100km | 19th Yukihashi to Beppu 100 km |
24:59:12 h | 2745 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 15/11/2025 | 4th Kumagawa Revival Trail | 101,00 | ×6 |
| ✓ 2 | 7/10/2017 | 19th Yukihashi to Beppu 100 km | 100,00 | ×6 |
| ✓ 3 | 6/4/2025 | 10th Tara Forest Trail | 52,00 | ×3 |
| ✓ 4 | 15/12/2024 | 9th Minami-aso caldera Trail | 50,00 | ×3 |