Naomi (笹島奈保美) Sasajima
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16
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
33
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
40,3%
Rank quotient ?This runner's calculation uses 16 eligible race(s): Σ(rank − 1) = 1 492; Σ finishers = 3 700. 1 492 / 3 700 × 100 = 40.32%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed16
Km — ultra races1 321 km
> 100 km4
Longest race110,0 km
1st Kyoto Ultra Walking 110km — 26/11/2022
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road48,1%
Trail12,9%
Ult.Walk39,0%
Wins & podiums (ultra)
🏆 Win0
🏆 Win F0
🏅 Top 30
🏅 Top 3 F4
Longest winning streak0
Current streak0
HISTORY
16 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 26/11/2022 | 1st Kyoto Ultra Walking 110km | 110,00 | ×3 |
| ✓ 2 | 3/5/2022 | 1st Miura-Halbinsel-Tour Ultra Walking | 105,00 | ×3 |
| ✓ 3 | 11/2/2022 | 1st Kobe Akashi Ultra Marathon | 105,00 | ×3 |
| ✓ 4 | 24/4/2021 | 4th Lake Kasumigaura Ultra Run | 104,00 | ×3 |
| ✓ 5 | 14/12/2024 | 2nd Okinawa Churaumi Ultra Walking | 100,00 | ×3 |
| ✓ 6 | 23/4/2022 | 4th Hakone Kodo Ultra Walking | 100,00 | ×3 |
| ✓ 7 | 17/7/2021 | 1st Nihondaira and Suruganokuni Ultra Run | 93,00 | ×2 |
| ✓ 8 | 17/9/2022 | 8th Nishi Seto Expressway Ultra Run | 80,00 | ×2 |
| ✓ 9 | 4/12/2021 | 7th Nishi Seto Expressway Ultra Run | 80,00 | ×2 |
| ✓ 10 | 20/9/2020 | 6th Nishi Seto Expressway Ultra Run | 80,00 | ×2 |
| ✓ 11 | 14/9/2024 | 10th Nishi Seto Expressway Ultra Run | 75,00 | ×2 |
| ✓ 12 | 28/6/2025 | 1st Lavender Road that runs through Asahikawa Biei and Furano | 65,00 | ×1 |
| ✓ 13 | 19/4/2026 | 36th Fuji 3 Lakes 62 km Challenge | 62,00 | ×1 |
| ✓ 14 | 20/4/2025 | 35th Fuji 3 Lakes 62 km Challenge | 62,00 | ×1 |
| ✓ 15 | 20/12/2025 | 2nd One-day walking - Kanto Chiho | 50,00 | ×1 |
| ✓ 16 | 21/12/2024 | 1st One-day walking - Kanto Chiho | 50,00 | ×1 |