Takahiro (石川貴浩) Ishikawa
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Born : 1985
Cat. M40 Ultrarunner since 2009
13
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
Japan86,1%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 7 336; Σ finishers = 8 521. 7 336 / 8 521 × 100 = 86.09%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed13
Km — ultra races873 km
> 100 km2
Longest race105,0 km
4th Nihondaira and Suruganokuni Ultra Run — 13/7/2024
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road88,3%
Ult.Walk11,7%
Records
No record for a classic ultra format
HISTORY
13 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 19.04 | 62km | 36th Fuji 3 Lakes 62 km Challenge |
10:07:55 h | 557 |
| 10.01 | 102km | 3rd Nara Mahoroba Ultra Walking |
21:50:32 h | 133 |
| 2025 | ||||
| 20.04 | 62km | 35th Fuji 3 Lakes 62 km Challenge |
10:16:38 h | 731 |
| 2024 | ||||
| 13.07 | 105km | 4th Nihondaira and Suruganokuni Ultra Run |
23:40:50 h | 32 |
| 21.04 | 62km | 34th Fuji 3 Lakes 62 km Challenge |
9:48:09 h | 916 |
| 2022 | ||||
| 18.09 | 60km | 20th Tango 60 km Ultramarathon |
9:12:39 h | 262 |
| 2018 | ||||
| 16.09 | 60km | 18th Tango 60 km Ultramarathon |
9:22:57 h | 699 |
| 2016 | ||||
| 18.09 | 60km | 16th Tango 60 km Ultramarathon |
9:17:25 h | 844 |
| 2015 | ||||
| 20.09 | 60km | 15th Tango 60 km Ultramarathon |
9:16:31 h | 875 |
| 2013 | ||||
| 15.09 | 60km | 13th Tango 60 km Ultramarathon |
9:20:59 h | 873 |
| 2012 | ||||
| 21.09 | 60km | 12th Tango 60 km Ultramarathon |
9:19:05 h | 509 |
| 2010 | ||||
| 19.09 | 60km | 10th Tango 60 km Ultramarathon |
9:19:43 h | 511 |
| 2009 | ||||
| 20.09 | 60km | 9th Tango 60 km Ultramarathon |
8:44:53 h | 407 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 13/7/2024 | 4th Nihondaira and Suruganokuni Ultra Run | 105,00 | ×3 |
| ✓ 2 | 10/1/2026 | 3rd Nara Mahoroba Ultra Walking | 102,00 | ×3 |
| ✓ 3 | 19/4/2026 | 36th Fuji 3 Lakes 62 km Challenge | 62,00 | ×2 |
| ✓ 4 | 20/4/2025 | 35th Fuji 3 Lakes 62 km Challenge | 62,00 | ×2 |
| ✓ 5 | 21/4/2024 | 34th Fuji 3 Lakes 62 km Challenge | 62,00 | ×2 |
| ✓ 6 | 18/9/2022 | 20th Tango 60 km Ultramarathon | 60,00 | ×2 |
| ✓ 7 | 16/9/2018 | 18th Tango 60 km Ultramarathon | 60,00 | ×2 |
| ✓ 8 | 18/9/2016 | 16th Tango 60 km Ultramarathon | 60,00 | ×2 |
| ✓ 9 | 20/9/2015 | 15th Tango 60 km Ultramarathon | 60,00 | ×2 |
| ✓ 10 | 15/9/2013 | 13th Tango 60 km Ultramarathon | 60,00 | ×2 |
| ✓ 11 | 21/9/2012 | 12th Tango 60 km Ultramarathon | 60,00 | ×2 |
| ✓ 12 | 19/9/2010 | 10th Tango 60 km Ultramarathon | 60,00 | ×2 |
| ✓ 13 | 20/9/2009 | 9th Tango 60 km Ultramarathon | 60,00 | ×2 |