Keiko (岡村佳子) Okamura
External sources
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Ultrarunner since 2025
3
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
Japan28,1%
Rank quotient ?This runner's calculation uses 3 eligible race(s): Σ(rank − 1) = 188; Σ finishers = 670. 188 / 670 × 100 = 28.06%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed3
Km — ultra races234 km
Longest race100,0 km
6th Mine Akiyoshidai Geopark Ultra Marathon — 5/10/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road78,7%
Trail21,3%
Records
HISTORY
3 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 05.10 | 100km | 6th Mine Akiyoshidai Geopark Ultra Marathon |
12:20:48 h | 23 |
| 08.06 | 84.39km | 9th JAL Mukatsuku Double Marathon |
9:41:39 h | 110 |
| 25.05 | 50km | 10th Akiyoshidai Karst Trail Run |
6:30:35 h | 58 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 5/10/2025 | 6th Mine Akiyoshidai Geopark Ultra Marathon | 100,00 | ×7 |
| ✓ 2 | 8/6/2025 | 9th JAL Mukatsuku Double Marathon | 84,39 | ×6 |
| ✓ 3 | 25/5/2025 | 10th Akiyoshidai Karst Trail Run | 50,00 | ×3 |