Yoshiaki (内藤嘉昭) Naito
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Born : 1981
Cat. M45 Ultrarunner since 2013
9
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
23
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
Japan56,8%
Rank quotient ?This runner's calculation uses 9 eligible race(s): Σ(rank − 1) = 2 113; Σ finishers = 3 719. 2 113 / 3 719 × 100 = 56.82%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed9
Km — ultra races622 km
> 100 km1
Longest race112,0 km
5th Oedo Night run 112k — 28/2/2015
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road18,0%
Trail82,0%
Records
HISTORY
9 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 25.04 | 70km | 5th KAI 70k |
13:03:05 h | 341 |
| 2025 | ||||
| 02.11 | 79km | 3rd Salt Road Trail |
10:49:39 h | 85 |
| 07.09 | 50km | 14th Hakuba Int. Trail Run Duo |
9:12:09 h | 11 |
| 11.05 | 51km | 6th FunTrails Round Minano |
10:16:37 h | 387 |
| 2020 | ||||
| 08.02 | 50km | 11th OSJ Jungle Trail 50K Amami |
6:46:24 h | 55 |
| 2015 | ||||
| 28.02 | 112km | 5th Oedo Night run 112k |
16:33:44 h | 45 |
| 2014 | ||||
| 26.04 | 88km | 3rd Shizuoka to Yamanashi |
22:41:31 h | 579 |
| 09.02 | 50km | 5th OSJ Jungle Trail 50K Amami |
6:07:22 h | 33 |
| 2013 | ||||
| 10.03 | 72km | 1st Izu Trail Journey |
11:47:51 h | 586 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 28/2/2015 | 5th Oedo Night run 112k | 112,00 | ×4 |
| ✓ 2 | 26/4/2014 | 3rd Shizuoka to Yamanashi (STY) | 88,00 | ×3 |
| ✓ 3 | 2/11/2025 | 3rd Salt Road Trail | 79,00 | ×3 |
| ✓ 4 | 10/3/2013 | 1st Izu Trail Journey | 72,00 | ×3 |
| ✓ 5 | 25/4/2026 | 5th KAI 70k | 70,00 | ×3 |
| ✓ 6 | 11/5/2025 | 6th FunTrails Round Minano | 51,00 | ×2 |
| ✓ 7 | 7/9/2025 | 14th Hakuba Int. Trail Run Duo | 50,00 | ×2 |
| ✓ 8 | 8/2/2020 | 11th OSJ Jungle Trail 50K Amami | 50,00 | ×2 |
| ✓ 9 | 9/2/2014 | 5th OSJ Jungle Trail 50K Amami | 50,00 | ×2 |