Kenichi (小坂憲一) Kosaka
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Born : 1967
Cat. M55 Ultrarunner since 2011
13
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
30
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
Japan51,1%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 2 927; Σ finishers = 5 726. 2 927 / 5 726 × 100 = 51.12%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed13
Km — ultra races1 103 km
Longest race100,0 km
22th Muraoka 100 km Ultra Marathon — 29/9/2019
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road93,7%
Trail6,3%
Records
HISTORY
13 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 28.09 | 88km | 28th Muraoka 88 km Ultra Marathon |
13:40:40 h | 180 |
| 2024 | ||||
| 29.09 | 64km | 27th Muraoka 64 km Ultra Marathon |
9:51:33 h | 192 |
| 2023 | ||||
| 15.10 | 60km | 29th River Shimanto 60km |
8:40:17 h | 292 |
| 2022 | ||||
| 29.09 | 45km | 25th Muraoka 45 km Ultra Marathon |
6:19:37 h | 664 |
| 2019 | ||||
| 29.09 | 100km | 22th Muraoka 100 km Ultra Marathon |
13:37:27 h | 375 |
| 2017 | ||||
| 28.05 | 100km | 24th Ebisu-Daikoku 100 km Marathon |
12:55:25 h | 211 |
| 2015 | ||||
| 27.09 | 100km | 18th Muraoka 100 km Ultra Marathon |
12:32:33 h | 187 |
| 2014 | ||||
| 28.09 | 100km | 17th Muraoka 100 km Ultra Marathon |
12:12:42 h | 149 |
| 2013 | ||||
| 20.10 | 100km | 19th River Shimanto 100km |
11:42:18 h | 342 |
| 29.09 | 88km | 16th Muraoka 88 km Ultra Marathon |
11:37:58 h | 43 |
| 2012 | ||||
| 27.05 | 100km | 19th Ebisu-Daikoku 100 km Marathon |
12:05:30 h | 123 |
| 2011 | ||||
| 25.09 | 88km | 14th Muraoka 88 km Ultra Marathon |
10:42:59 h | 24 |
| 03.05 | 70km | 19. Mukogawa Yurikamome Ultra Marathon |
7:10:11 h | 158 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 29/9/2019 | 22th Muraoka 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 2 | 28/5/2017 | 24th Ebisu-Daikoku 100 km Marathon | 100,00 | ×3 |
| ✓ 3 | 27/9/2015 | 18th Muraoka 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 4 | 28/9/2014 | 17th Muraoka 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 5 | 20/10/2013 | 19th River Shimanto 100km | 100,00 | ×3 |
| ✓ 6 | 27/5/2012 | 19th Ebisu-Daikoku 100 km Marathon | 100,00 | ×3 |
| ✓ 7 | 28/9/2025 | 28th Muraoka 88 km Ultra Marathon | 88,00 | ×2 |
| ✓ 8 | 29/9/2013 | 16th Muraoka 88 km Ultra Marathon | 88,00 | ×2 |
| ✓ 9 | 25/9/2011 | 14th Muraoka 88 km Ultra Marathon | 88,00 | ×2 |
| ✓ 10 | 3/5/2011 | 19. Mukogawa Yurikamome Ultra Marathon | 70,00 | ×2 |
| ✓ 11 | 29/9/2024 | 27th Muraoka 64 km Ultra Marathon | 64,00 | ×2 |
| ✓ 12 | 15/10/2023 | 29th River Shimanto 60km | 60,00 | ×2 |
| ✓ 13 | 29/9/2022 | 25th Muraoka 45 km Ultra Marathon | 45,00 | ×1 |