Masanori (薄井政徳) Usui
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Born : 1983
Cat. M40 Ultrarunner since 2011
11
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
Japan59,0%
Rank quotient ?This runner's calculation uses 11 eligible race(s): Σ(rank − 1) = 5 647; Σ finishers = 9 565. 5 647 / 9 565 × 100 = 59.04%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed11
Km — ultra races840 km
Longest race100,0 km
29. Akita Nairiku 100km Marathon — 22/9/2019
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road79,7%
Trail20,3%
Records
HISTORY
11 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2023 | ||||
| 27.05 | 62km | 11th Tojinbo 62 km Ultramarathon |
8:20:51 h | 114 |
| 2021 | ||||
| 07.11 | 50km | 8th Nakanoto Treasure Trail Run Festival |
8:31:53 h | 176 |
| 2019 | ||||
| 22.09 | 100km | 29. Akita Nairiku 100km Marathon |
12:03:59 h | 289 |
| 13.01 | 100km | 4th Yakushima Ultramarathon |
14:17:02 h | 83 |
| 2018 | ||||
| 13.05 | 60km | 4th Ishigaki Island Ultra Marathon |
7:14:49 h | 30 |
| 2017 | ||||
| 25.06 | 100km | 32. Lake Saroma 100 km Ultramarathon |
11:48:56 h | 1118 |
| 21.05 | 77km | 22th Saba Highway Ultramarathon |
10:12:34 h | 156 |
| 29.04 | 49km | 10th Ishioka Trail Run |
6:17:14 h | 87 |
| 08.04 | 70km | 12th Toda Saiko 70 km |
7:06:58 h | 184 |
| 2016 | ||||
| 26.06 | 100km | 31. Lake Saroma 100 km Ultramarathon |
12:38:08 h | 2149 |
| 2011 | ||||
| 09.10 | 71.5km | 19th Hasetsune Cup - Japan Mountain Endurance Race |
19:37:55 h | 1272 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 22/9/2019 | 29. Akita Nairiku 100km Marathon | 100,00 | ×4 |
| ✓ 2 | 13/1/2019 | 4th Yakushima Ultramarathon | 100,00 | ×4 |
| ✓ 3 | 25/6/2017 | 32. Lake Saroma 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 4 | 26/6/2016 | 31. Lake Saroma 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 5 | 21/5/2017 | 22th Saba Highway Ultramarathon | 77,00 | ×3 |
| ✓ 6 | 9/10/2011 | 19th Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 7 | 8/4/2017 | 12th Toda Saiko 70 km | 70,00 | ×2 |
| ✓ 8 | 27/5/2023 | 11th Tojinbo 62 km Ultramarathon | 62,00 | ×2 |
| ✓ 9 | 13/5/2018 | 4th Ishigaki Island Ultra Marathon | 60,00 | ×2 |
| ✓ 10 | 7/11/2021 | 8th Nakanoto Treasure Trail Run Festival | 50,00 | ×2 |
| ✓ 11 | 29/4/2017 | 10th Ishioka Trail Run | 49,00 | ×1 |