Masahiko (服部雅彦) Hattori
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Ultrarunner since 2024
2
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
14
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
Japan91,5%
Rank quotient ?This runner's calculation uses 2 eligible race(s): Σ(rank − 1) = 247; Σ finishers = 270. 247 / 270 × 100 = 91.48%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed2
Km — ultra races205 km
> 100 km1
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)
Road51,2%
Ult.Walk48,8%
Records
HISTORY
2 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 23.08 | 100km | 1st Summer Karuizawa and Joshu Nakasendo Ultra Walking |
29:56:12 h | 155 |
| 2024 | ||||
| 13.07 | 105km | 4th Nihondaira and Suruganokuni Ultra Run |
29:39:01 h | 94 |
| 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 | ×7 |
| ✓ 2 | 23/8/2025 | 1st Summer Karuizawa and Joshu Nakasendo Ultra Walking | 100,00 | ×7 |