Takeshi (長岡武史) Nagaoka
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Born : 1972
Cat. M50 Ultrarunner since 2014
13
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
25
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
Japan51,0%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 2 107; Σ finishers = 4 132. 2 107 / 4 132 × 100 = 50.99%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed13
Km — ultra races812 km
> 100 km2
Longest race101,0 km
4th Kumagawa Revival Trail — 15/11/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road12,3%
Trail87,7%
Records
HISTORY
13 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 09.05 | 50km | 12th Mt. Hiei Int. 50 km Trail Run |
10:42:32 h | 383 |
| 2025 | ||||
| 15.11 | 101km | 4th Kumagawa Revival Trail |
24:08:58 h | 79 |
| 25.05 | 50km | 10th Akiyoshidai Karst Trail Run |
6:57:52 h | 93 |
| 26.04 | 48km | 1st Grand Diamond Trailrun |
9:18:09 h | 54 |
| 2024 | ||||
| 16.11 | 101km | 3rd Kumagawa Revival Trail |
24:14:45 h | 100 |
| 11.05 | 50km | 10th Mt. Hiei Int. 50 km Trail Run |
10:31:26 h | 419 |
| 2023 | ||||
| 28.05 | 60km | 8th Akiyoshidai Karst Trail Run |
9:11:04 h | 110 |
| 22.04 | 69km | 2nd KAI 69k |
13:24:25 h | 287 |
| 2022 | ||||
| 23.04 | 69km | 1st KAI 69k |
14:57:28 h | 191 |
| 2021 | ||||
| 09.10 | 59km | 5th Kyoto Grand Traverse |
11:27:51 h | 96 |
| 2019 | ||||
| 11.05 | 54.5km | 3rd Aso Round Trail Half |
12:23:46 h | 126 |
| 2015 | ||||
| 06.06 | 50km | 25th Aso Caldera Super Marathon 50 km |
4:56:21 h | 64 |
| 2014 | ||||
| 07.06 | 50km | 24th Aso Caldera Super Marathon 50 km |
5:16:21 h | 118 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 15/11/2025 | 4th Kumagawa Revival Trail | 101,00 | ×4 |
| ✓ 2 | 16/11/2024 | 3rd Kumagawa Revival Trail | 101,00 | ×4 |
| ✓ 3 | 22/4/2023 | 2nd KAI 69k | 69,00 | ×2 |
| ✓ 4 | 23/4/2022 | 1st KAI 69k | 69,00 | ×2 |
| ✓ 5 | 28/5/2023 | 8th Akiyoshidai Karst Trail Run | 60,00 | ×2 |
| ✓ 6 | 9/10/2021 | 5th Kyoto Grand Traverse | 59,00 | ×2 |
| ✓ 7 | 11/5/2019 | 3rd Aso Round Trail Half | 54,50 | ×2 |
| ✓ 8 | 9/5/2026 | 12th Mt. Hiei Int. 50 km Trail Run | 50,00 | ×2 |
| ✓ 9 | 25/5/2025 | 10th Akiyoshidai Karst Trail Run | 50,00 | ×2 |
| ✓ 10 | 11/5/2024 | 10th Mt. Hiei Int. 50 km Trail Run | 50,00 | ×2 |
| ✓ 11 | 6/6/2015 | 25th Aso Caldera Super Marathon 50 km | 50,00 | ×2 |
| ✓ 12 | 7/6/2014 | 24th Aso Caldera Super Marathon 50 km | 50,00 | ×2 |
| ✓ 13 | 26/4/2025 | 1st Grand Diamond Trailrun | 48,00 | ×1 |