Maki (山腰真喜) Yamakoshi
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Ultrarunner since 2019
4
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
Japan76,8%
Rank quotient ?This runner's calculation uses 4 eligible race(s): Σ(rank − 1) = 911; Σ finishers = 1 186. 911 / 1 186 × 100 = 76.81%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed4
Km — ultra races229 km
Longest race63,0 km
14th Tojinbo 62 km Ultramarathon — 6/6/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
No record for a classic ultra format
HISTORY
4 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 06.06 | 63km | 14th Tojinbo 62 km Ultramarathon |
10:43:00 h | 364 |
| 2023 | ||||
| 27.05 | 62km | 11th Tojinbo 62 km Ultramarathon |
9:29:19 h | 240 |
| 2022 | ||||
| 28.05 | 52km | 10th Tojinbo 52 km Ultramarathon |
8:14:57 h | 126 |
| 2019 | ||||
| 25.05 | 52km | 8th Tojinbo 52 km Ultramarathon |
10:41:28 h | 185 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 6/6/2026 | 14th Tojinbo 62 km Ultramarathon | 63,00 | ×4 |
| ✓ 2 | 27/5/2023 | 11th Tojinbo 62 km Ultramarathon | 62,00 | ×4 |
| ✓ 3 | 28/5/2022 | 10th Tojinbo 52 km Ultramarathon | 52,00 | ×3 |
| ✓ 4 | 25/5/2019 | 8th Tojinbo 52 km Ultramarathon | 52,00 | ×3 |