Kenji (川崎健司) Kawasaki
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Born : 1985
Cat. M40 Ultrarunner since 2017
8
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
28
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
Japan56,4%
Rank quotient ?This runner's calculation uses 8 eligible race(s): Σ(rank − 1) = 2 696; Σ finishers = 4 779. 2 696 / 4 779 × 100 = 56.41%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed8
Km — ultra races915 km
> 100 km4
> 160 km1
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)
Road32,8%
Trail23,2%
Ult.Walk44,0%
Records
HISTORY
8 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 02.05 | 200km | 9th Ultra Walking around Lake Biwa |
2d 00:19:25 h | 106 |
| 2025 | ||||
| 19.07 | 102km | 2nd Shinshu Nakasendo 12 Stations Ultra Race |
24:40:31 h | 98 |
| 2024 | ||||
| 06.04 | 103km | 7th Ultra Walking around Lake Biwa |
19:08:02 h | 43 |
| 2023 | ||||
| 11.02 | 110km | 1st Awaji Island Round Ultra |
21:34:13 h | 37 |
| 2022 | ||||
| 15.10 | 100km | 5th Nakasendo to Kisoji Ultra Run |
23:11:01 h | 33 |
| 23.04 | 100km | 4th Hakone Kodo Ultra Walking |
20:01:45 h | 13 |
| 2021 | ||||
| 16.10 | 100km | 4th Nakasendo to Kisoji Ultra Run |
24:40:02 h | 66 |
| 2017 | ||||
| 07.10 | 100km | 19th Yukihashi to Beppu 100 km |
24:12:53 h | 2308 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 2/5/2026 | 9th Ultra Walking around Lake Biwa | 200,00 | ×7 |
| ✓ 2 | 11/2/2023 | 1st Awaji Island Round Ultra | 110,00 | ×3 |
| ✓ 3 | 6/4/2024 | 7th Ultra Walking around Lake Biwa | 103,00 | ×3 |
| ✓ 4 | 19/7/2025 | 2nd Shinshu Nakasendo 12 Stations Ultra Race | 102,00 | ×3 |
| ✓ 5 | 15/10/2022 | 5th Nakasendo to Kisoji Ultra Run | 100,00 | ×3 |
| ✓ 6 | 23/4/2022 | 4th Hakone Kodo Ultra Walking | 100,00 | ×3 |
| ✓ 7 | 16/10/2021 | 4th Nakasendo to Kisoji Ultra Run | 100,00 | ×3 |
| ✓ 8 | 7/10/2017 | 19th Yukihashi to Beppu 100 km | 100,00 | ×3 |