Naoaki (呉尚哲) Wu
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Born : 1966
Cat. M60 Ultrarunner since 2017
16
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
31
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
Japan20,0%
Rank quotient ?This runner's calculation uses 16 eligible race(s): Σ(rank − 1) = 2 782; Σ finishers = 13 927. 2 782 / 13 927 × 100 = 19.98%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed16
Km — ultra races1 216 km
Longest race100,0 km
41. Lake Saroma 100 km Ultramarathon — 28/6/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
HISTORY
16 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 28.06 | 100km | 41. Lake Saroma 100 km Ultramarathon |
9:31:11 h | 338 |
| 19.04 | 80km | 36th Fuji 4 Lakes 80 km Challenge |
8:29:21 h | 23 |
| 2025 | ||||
| 29.06 | 100km | 40. Lake Saroma 100 km Ultramarathon |
11:55:53 h | 985 |
| 12.04 | 71km | 20th Toda Saiko 70 km |
7:40:21 h | 111 |
| 2024 | ||||
| 21.04 | 62km | 34th Fuji 3 Lakes 62 km Challenge |
6:10:55 h | 54 |
| 30.03 | 60km | 4th Tama River Clear Stream Marathon 60km |
5:34:40 h | 6 |
| 2023 | ||||
| 16.04 | 62km | 33th Fuji 3 Lakes 62 km Challenge |
5:54:26 h | 34 |
| 15.01 | 50km | 3rd Tokyo Edogawa Ultra Marathon - 50 km |
4:23:33 h | 4 |
| 2022 | ||||
| 22.05 | 100km | 10th Tokyo Shibamata 100 km |
11:32:06 h | 235 |
| 17.04 | 62km | 32th Fuji 5 Lakes 62 km Challenge |
5:45:18 h | 18 |
| 2021 | ||||
| 08.05 | 57km | 1st Kimitsu Ultra Marathon |
5:38:12 h | 24 |
| 2019 | ||||
| 19.05 | 100km | 7th Tokyo Shibamata 100 km |
11:56:21 h | 551 |
| 21.04 | 71km | 29th Fuji 5 Lakes 71 km Challenge |
7:20:42 h | 51 |
| 2018 | ||||
| 03.06 | 100km | 6th Tokyo Shibamata 100 km |
10:51:55 h | 200 |
| 14.04 | 70km | 13th Toda Saiko 70 km |
6:40:52 h | 96 |
| 2017 | ||||
| 23.04 | 71km | 27th Fuji 5 Lakes 71 km Challenge |
7:13:09 h | 68 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 28/6/2026 | 41. Lake Saroma 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 2 | 29/6/2025 | 40. Lake Saroma 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 3 | 22/5/2022 | 10th Tokyo Shibamata 100 km | 100,00 | ×3 |
| ✓ 4 | 19/5/2019 | 7th Tokyo Shibamata 100 km | 100,00 | ×3 |
| ✓ 5 | 3/6/2018 | 6th Tokyo Shibamata 100 km | 100,00 | ×3 |
| ✓ 6 | 19/4/2026 | 36th Fuji 4 Lakes 80 km Challenge | 80,00 | ×2 |
| ✓ 7 | 12/4/2025 | 20th Toda Saiko 70 km | 71,00 | ×2 |
| ✓ 8 | 21/4/2019 | 29th Fuji 5 Lakes 71 km Challenge | 71,00 | ×2 |
| ✓ 9 | 23/4/2017 | 27th Fuji 5 Lakes 71 km Challenge | 71,00 | ×2 |
| ✓ 10 | 14/4/2018 | 13th Toda Saiko 70 km | 70,00 | ×2 |
| ✓ 11 | 21/4/2024 | 34th Fuji 3 Lakes 62 km Challenge | 62,00 | ×2 |
| ✓ 12 | 16/4/2023 | 33th Fuji 3 Lakes 62 km Challenge | 62,00 | ×2 |
| ✓ 13 | 17/4/2022 | 32th Fuji 5 Lakes 62 km Challenge | 62,00 | ×2 |
| ✓ 14 | 30/3/2024 | 4th Tama River Clear Stream Marathon 60km | 60,00 | ×1 |
| ✓ 15 | 8/5/2021 | 1st Kimitsu Ultra Marathon | 57,00 | ×1 |
| ✓ 16 | 15/1/2023 | 3rd Tokyo Edogawa Ultra Marathon - 50 km | 50,00 | ×1 |