Koji (山崎浩二) Yamazaki
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16
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
41
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
2
Countries visited ?
Japan
New Zealand
28,2%
Rank quotient ?This runner's calculation uses 16 eligible race(s): Σ(rank − 1) = 1 773; Σ finishers = 6 285. 1 773 / 6 285 × 100 = 28.21%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed16
Km — ultra races2 145 km
> 100 km11
> 160 km10
Longest race180,0 km
2nd Osaka Natsunojin Kurondo Rondo - 180 km — 12/11/2021
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road11,8%
Trail88,2%
Records
HISTORY
16 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 12/11/2021 | 2nd Osaka Natsunojin Kurondo Rondo - 180 km | 180,00 | ×4 |
| ✓ 2 | 7/6/2024 | 3rd Tamba 100 Adventure Trail - 100mi | 170,00 | ×4 |
| ✓ 3 | 2/6/2023 | 2nd Tamba 100 Adventure Trail - 100mi | 170,00 | ×4 |
| ✓ 4 | 25/4/2025 | 10th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×4 |
| ✓ 5 | 22/4/2022 | 7th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×4 |
| ✓ 6 | 11/2/2023 | 5th Tarawera 100 Mile Endurance Run | 165,20 | ×4 |
| ✓ 7 | 16/2/2024 | 6th Tarawera 100 Mile Endurance Run | 165,00 | ×4 |
| ✓ 8 | 16/9/2023 | 15th Shinetsu Five Mountains Trail 100 mile | 162,60 | ×3 |
| ✓ 9 | 17/9/2022 | 14th Shinetsu Five Mountains Trail 100 mile | 162,60 | ×3 |
| ✓ 10 | 1/5/2021 | 1st Yarikan 100 | 160,93 | ×3 |
| ✓ 11 | 16/7/2023 | 15th OSJ Ontake 100km Ultra Trail | 109,20 | ×2 |
| ✓ 12 | 29/9/2024 | 2nd Mount Akagi 100 Ultra Marathon | 100,00 | ×2 |
| ✓ 13 | 19/5/2024 | 29th Saba Highway Ultramarathon | 77,00 | ×1 |
| ✓ 14 | 21/5/2023 | 28th Saba Highway Ultramarathon | 77,00 | ×1 |
| ✓ 15 | 9/8/2020 | 1st Osaka Natsunojin Kurondo Rondo - 60 km | 60,00 | ×1 |
| ✓ 16 | 9/4/2023 | 1st AYABE Trailrun | 51,40 | ×1 |