Yasuo (永井保雄) Nagai
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Ultrarunner since 2014
10
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
1
Countries visited ?Japan
Japan80,7%
Rank quotient ?This runner's calculation uses 10 eligible race(s): Σ(rank − 1) = 1 650; Σ finishers = 2 044. 1 650 / 2 044 × 100 = 80.72%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed10
Km — ultra races550 km
Longest race62,0 km
13th Tojinbo 62 km Ultramarathon — 31/5/2025
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
10 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 31.05 | 62km | 13th Tojinbo 62 km Ultramarathon |
10:11:25 h | 296 |
| 2024 | ||||
| 25.05 | 62km | 12th Tojinbo 62 km Ultramarathon |
10:14:06 h | 254 |
| 2023 | ||||
| 27.05 | 62km | 11th Tojinbo 62 km Ultramarathon |
9:25:29 h | 225 |
| 2022 | ||||
| 28.05 | 52km | 10th Tojinbo 52 km Ultramarathon |
8:39:06 h | 148 |
| 2019 | ||||
| 25.05 | 52km | 8th Tojinbo 52 km Ultramarathon |
9:46:20 h | 156 |
| 2018 | ||||
| 26.05 | 52km | 7th Tojinbo 52 km Ultramarathon |
8:52:17 h | 116 |
| 2017 | ||||
| 27.05 | 52km | 6th Tojinbo 52 km Ultramarathon |
9:26:16 h | 149 |
| 2016 | ||||
| 28.05 | 52km | 5th Tojinbo 52 km Ultramarathon |
9:17:31 h | 145 |
| 2015 | ||||
| 16.05 | 52km | 4th Tojinbo 52 km Ultramarathon |
7:59:03 h | 86 |
| 2014 | ||||
| 10.05 | 52km | 3rd Tojinbo 52 km Ultramarathon |
8:50:20 h | 85 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 31/5/2025 | 13th Tojinbo 62 km Ultramarathon | 62,00 | ×3 |
| ✓ 2 | 25/5/2024 | 12th Tojinbo 62 km Ultramarathon | 62,00 | ×3 |
| ✓ 3 | 27/5/2023 | 11th Tojinbo 62 km Ultramarathon | 62,00 | ×3 |
| ✓ 4 | 28/5/2022 | 10th Tojinbo 52 km Ultramarathon | 52,00 | ×2 |
| ✓ 5 | 25/5/2019 | 8th Tojinbo 52 km Ultramarathon | 52,00 | ×2 |
| ✓ 6 | 26/5/2018 | 7th Tojinbo 52 km Ultramarathon | 52,00 | ×2 |
| ✓ 7 | 27/5/2017 | 6th Tojinbo 52 km Ultramarathon | 52,00 | ×2 |
| ✓ 8 | 28/5/2016 | 5th Tojinbo 52 km Ultramarathon | 52,00 | ×2 |
| ✓ 9 | 16/5/2015 | 4th Tojinbo 52 km Ultramarathon | 52,00 | ×2 |
| ✓ 10 | 10/5/2014 | 3rd Tojinbo 52 km Ultramarathon | 52,00 | ×2 |