Yoko (白石陽子) Shiraishi
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Born : 1967
Cat. W55 Ultrarunner since 2009
9
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
Japan55,5%
Rank quotient ?This runner's calculation uses 9 eligible race(s): Σ(rank − 1) = 4 303; Σ finishers = 7 750. 4 303 / 7 750 × 100 = 55.52%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed9
Km — ultra races709 km
> 100 km1
Longest race110,0 km
6th Shinetsu Five Mountains Trail 110km — 14/9/2014
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road25,0%
Trail75,0%
Records
HISTORY
9 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2016 | ||||
| 13.11 | 50km | 8th Kanna Mountain Run II |
9:34:00 h | 54 |
| 09.10 | 71.5km | 24th Hasetsune Cup - Japan Mountain Endurance Race |
20:32:39 h | 1575 |
| 2015 | ||||
| 17.05 | 100km | 21st Yatsugatake Nobeyama 100 km |
12:51:05 h | 679 |
| 2014 | ||||
| 14.09 | 110km | 6th Shinetsu Five Mountains Trail 110km |
19:40:41 h | 289 |
| 2013 | ||||
| 07.09 | 100km | 2nd OSJ Yatsugatake Super Trail 100 km race |
17:39:15 h | 211 |
| 2011 | ||||
| 06.11 | 50km | 3rd Kanna Mountain Run II |
8:55:15 h | 45 |
| 07.08 | 77km | 18. Ultramarathon Okumusashi |
9:37:49 h | 505 |
| 26.06 | 100km road race | 26. Lake Saroma 100 km Ultramarathon |
11:22:12 h | 788 |
| 2009 | ||||
| 08.02 | 50km | 1st OSJ Jungle Trail 50K Amami |
8:24:06 h | 166 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 14/9/2014 | 6th Shinetsu Five Mountains Trail 110km | 110,00 | ×4 |
| ✓ 2 | 17/5/2015 | 21st Yatsugatake Nobeyama 100 km | 100,00 | ×4 |
| ✓ 3 | 7/9/2013 | 2nd OSJ Yatsugatake Super Trail 100 km race | 100,00 | ×4 |
| ✓ 4 | 26/6/2011 | 26. Lake Saroma 100 km Ultramarathon (JPN) | 100,00 | ×4 |
| ✓ 5 | 7/8/2011 | 18. Ultramarathon Okumusashi | 77,00 | ×3 |
| ✓ 6 | 9/10/2016 | 24th Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 7 | 13/11/2016 | 8th Kanna Mountain Run II | 50,00 | ×2 |
| ✓ 8 | 6/11/2011 | 3rd Kanna Mountain Run II | 50,00 | ×2 |
| ✓ 9 | 8/2/2009 | 1st OSJ Jungle Trail 50K Amami | 50,00 | ×2 |