Nanako (佐光菜々子) Sako
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Born : 1997
Cat. W23 Ultrarunner since 2023
7
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
20
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 ?
ChinaJapan
ChinaJapan25,6%
Rank quotient ?This runner's calculation uses 7 eligible race(s): Σ(rank − 1) = 674; Σ finishers = 2 630. 674 / 2 630 × 100 = 25.63%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed7
Km — ultra races495 km
> 100 km2
Longest race112,7 km
17th Shinetsu Five Mountains Trail 110km — 14/9/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road36,2%
Trail63,8%
Wins & podiums (ultra)
🏆 Win0
🏆 Win F2
🏅 Top 30
🏅 Top 3 F3
Longest winning streak0
Current streak0
Records
HISTORY
7 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 14/9/2025 | 17th Shinetsu Five Mountains Trail 110km | 112,70 | ×5 |
| ✓ 2 | 23/8/2024 | 11th World Cultural Heritage "Fuji" Foot Race | 101,00 | ×5 |
| ✓ 3 | 4/6/2023 | 30. Ultramarathon Okumusashi | 78,00 | ×3 |
| ✓ 4 | 20/6/2026 | 2nd Kaga Spa by UTMB - Kaga Spa Trail Endurance 50 | 58,00 | ×2 |
| ✓ 5 | 31/10/2025 | 10th Ultra Trail Mt Siguniang 50 km NHP | 50,00 | ×2 |
| ✓ 6 | 1/12/2024 | 11th Trainic world Soto-Chichibu Trail Run 50km | 50,00 | ×2 |
| ✓ 7 | 30/11/2025 | 12th Trainic world Soto-Chichibu Trail Run 45km | 45,00 | ×2 |