Ryuta (佐々木竜太) Sasaki
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10
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
27
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
64,3%
Rank quotient ?This runner's calculation uses 10 eligible race(s): Σ(rank − 1) = 2 506; Σ finishers = 3 900. 2 506 / 3 900 × 100 = 64.26%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed10
Km — ultra races945 km
> 100 km6
Longest race115,1 km
3rd Aso Volcano Trail — 10/5/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail100,0%
Records
HISTORY
10 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 10.05 | 115.1km | 23:45:25 h | 305 | |
| 2023 | ||||
| 17.09 | 110km | 21:20:34 h | 179 | |
| 2018 | ||||
| 16.09 | 110km | 19:35:47 h | 135 | |
| 2016 | ||||
| 18.09 | 110km | 18:05:53 h | 238 | |
| 2015 | ||||
| 22.09 | 110km | 20:01:21 h | 351 | |
| 04.07 | 80km | 15:29:39 h | 414 | |
| 2014 | ||||
| 05.10 | 50km | 7:32:08 h | 218 | |
| 05.07 | 80km | 14:50:01 h | 200 | |
| 2013 | ||||
| 15.09 | 110km | 19:12:09 h | 241 | |
| 31.08 | 70km | 14:10:20 h | 235 | |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 10/5/2025 | 3rd Aso Volcano Trail | 115,10 | ×4 |
| ✓ 2 | 17/9/2023 | 15th Shinetsu Five Mountains Trail 110km | 110,00 | ×4 |
| ✓ 3 | 16/9/2018 | 10th Shinetsu Five Mountains Trail 110km | 110,00 | ×4 |
| ✓ 4 | 18/9/2016 | 8th Shinetsu Five Mountains Trail 110km | 110,00 | ×4 |
| ✓ 5 | 22/9/2015 | 7th Shinetsu Five Mountains Trail 110km | 110,00 | ×4 |
| ✓ 6 | 15/9/2013 | 5th Shinetsu Five Mountains Trail 110km | 110,00 | ×4 |
| ✓ 7 | 4/7/2015 | 5th Utsukushigahara 80 km Trail Run | 80,00 | ×2 |
| ✓ 8 | 5/7/2014 | 4th Utsukushigahara 80 km Trail Run | 80,00 | ×2 |
| ✓ 9 | 31/8/2013 | 3rd Utsukushigahara 70 km Trail Run | 70,00 | ×2 |
| ✓ 10 | 5/10/2014 | 8th Madarao Forest Trails 50km | 50,00 | ×1 |