Zen (高内善) Kounai
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11
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
25
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
34,3%
Rank quotient ?This runner's calculation uses 11 eligible race(s): Σ(rank − 1) = 1 871; Σ finishers = 5 448. 1 871 / 5 448 × 100 = 34.34%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed11
Km — ultra races823 km
Longest race100,0 km
17th Muraoka 100 km Ultra Marathon — 28/9/2014
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
HISTORY
11 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 28.09 | 88km | 13:02:19 h | 108 | |
| 2023 | ||||
| 24.09 | 88km | 12:14:31 h | 71 | |
| 2022 | ||||
| 29.09 | 45km | 4:37:42 h | 184 | |
| 2019 | ||||
| 29.09 | 66km | 8:13:11 h | 43 | |
| 2016 | ||||
| 25.09 | 66km | 8:52:57 h | 70 | |
| 2014 | ||||
| 28.09 | 100km | 12:28:54 h | 176 | |
| 2013 | ||||
| 29.09 | 66km | 7:50:02 h | 51 | |
| 2012 | ||||
| 30.09 | 66km | 7:14:11 h | 25 | |
| 2011 | ||||
| 25.09 | 88km | 10:56:50 h | 30 | |
| 26.06 | 100km road race | 11:54:38 h | 1091 | |
| 2010 | ||||
| 20.06 | 50km | 5:30:22 h | 33 | |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 28/9/2014 | 17th Muraoka 100 km Ultra Marathon | 100,00 | ×4 |
| ✓ 2 | 26/6/2011 | 26. Lake Saroma 100 km Ultramarathon (JPN) | 100,00 | ×4 |
| ✓ 3 | 28/9/2025 | 28th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |
| ✓ 4 | 24/9/2023 | 26th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |
| ✓ 5 | 25/9/2011 | 14th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |
| ✓ 6 | 29/9/2019 | 22th Muraoka 66 km Ultra Marathon | 66,00 | ×2 |
| ✓ 7 | 25/9/2016 | 19th Muraoka 66 km Ultra Marathon | 66,00 | ×2 |
| ✓ 8 | 29/9/2013 | 16th Muraoka 66 km Ultra Marathon | 66,00 | ×2 |
| ✓ 9 | 30/9/2012 | 15th Muraoka 66 km Ultra Marathon | 66,00 | ×2 |
| ✓ 10 | 20/6/2010 | 5. Okinoshima 50km Ultra Marathon | 50,00 | ×2 |
| ✓ 11 | 29/9/2022 | 25th Muraoka 45 km Ultra Marathon | 45,00 | ×1 |