Takeshi (石原猛) Ishihara
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Born : 1979
Cat. M45 Ultrarunner since 2006
10
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
2
Countries visited ?Japan
Switzerland
JapanSwitzerland48,7%
Rank quotient ?This runner's calculation uses 10 eligible race(s): Σ(rank − 1) = 3 108; Σ finishers = 6 380. 3 108 / 6 380 × 100 = 48.71%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed10
Km — ultra races733 km
Longest race100,0 km
18th River Shimanto 100km — 21/10/2012
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road69,6%
Trail30,4%
Records
HISTORY
10 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2022 | ||||
| 22.07 | 68km | 1. Davos X-Trails |
12:39:42 h | 155 |
| 2015 | ||||
| 25.07 | 76.1km | 30. Swiss Alpine Marathon |
11:45:39 h | 532 |
| 2014 | ||||
| 12.10 | 60km | 10th Echigo Kubikino 60km Ultramarathon |
8:13:46 h | 371 |
| 26.07 | 79km | 29. Swiss Alpine Marathon |
13:24:21 h | 627 |
| 2012 | ||||
| 21.10 | 100km | 18th River Shimanto 100km |
11:42:43 h | 323 |
| 06.10 | 50km | 9th Echigo Kubikino 50km Ultramarathon |
6:44:16 h | 273 |
| 2010 | ||||
| 09.10 | 50km | 8th Echigo Kubikino 50km Ultramarathon |
6:56:26 h | 283 |
| 2008 | ||||
| 19.10 | 100km | 14th River Shimanto 100km |
10:55:02 h | 192 |
| 2007 | ||||
| 14.10 | 100km | 13th River Shimanto 100km |
10:06:36 h | 135 |
| 2006 | ||||
| 09.10 | 50km | 6th Echigo Kubikino 50km Ultramarathon |
6:41:17 h | 227 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 21/10/2012 | 18th River Shimanto 100km | 100,00 | ×4 |
| ✓ 2 | 19/10/2008 | 14th River Shimanto 100km | 100,00 | ×4 |
| ✓ 3 | 14/10/2007 | 13th River Shimanto 100km | 100,00 | ×4 |
| ✓ 4 | 26/7/2014 | 29. Swiss Alpine Marathon | 79,00 | ×3 |
| ✓ 5 | 25/7/2015 | 30. Swiss Alpine Marathon | 76,10 | ×3 |
| ✓ 6 | 22/7/2022 | 1. Davos X-Trails | 68,00 | ×2 |
| ✓ 7 | 12/10/2014 | 10th Echigo Kubikino 60km Ultramarathon | 60,00 | ×2 |
| ✓ 8 | 6/10/2012 | 9th Echigo Kubikino 50km Ultramarathon | 50,00 | ×2 |
| ✓ 9 | 9/10/2010 | 8th Echigo Kubikino 50km Ultramarathon | 50,00 | ×2 |
| ✓ 10 | 9/10/2006 | 6th Echigo Kubikino 50km Ultramarathon | 50,00 | ×2 |