Ryohei Kazahaya
External sources
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Born : 1963
Cat. M60 Ultrarunner since 2009
11
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
27
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 ?United States
United States30,7%
Rank quotient ?This runner's calculation uses 11 eligible race(s): Σ(rank − 1) = 238; Σ finishers = 776. 238 / 776 × 100 = 30.67%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed11
Km — ultra races989 km
> 100 km2
> 160 km2
Longest race160,9 km
4th Burning River 100 Mile Endurance Run — 31/7/2010
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road19,7%
Trail80,3%
Wins & podiums (ultra)
🏆 Win0
🏆 Win M0
🏅 Top 32
🏅 Top 3 M2
Longest winning streak0
Current streak0
HISTORY
11 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 31/7/2010 | 4th Burning River 100 Mile Endurance Run | 160,93 | ×5 |
| ✓ 2 | 1/8/2009 | 3rd Burning River 100 Mile Endurance Run | 160,93 | ×5 |
| ✓ 3 | 12/6/2010 | 5th Hawthorn Half Day Run | 98,01 | ×3 |
| ✓ 4 | 13/6/2009 | 4th Hawthorn Half Day Run | 97,20 | ×3 |
| ✓ 5 | 14/5/2011 | 8th Dances with Dirt - Gnaw Bone 50 Mile Ultra | 80,47 | ×2 |
| ✓ 6 | 18/9/2010 | 3rd Endurance Challenge - Wisconsin Trail 50 Miles | 80,47 | ×2 |
| ✓ 7 | 15/5/2010 | 7th Dances with Dirt - Gnaw Bone 50 Mile Ultra | 80,47 | ×2 |
| ✓ 8 | 12/9/2009 | 7th Dances with Dirt - Hell 50M Ultra | 80,47 | ×2 |
| ✓ 9 | 17/10/2009 | 4th Farmdale Trail Run 30 Mile | 51,50 | ×1 |
| ✓ 10 | 5/11/2011 | 15th OPSF Ultra 50 km Race | 50,00 | ×1 |
| ✓ 11 | 9/4/2011 | 2nd Winona Lake 30 Mile Trail Run | 48,28 | ×1 |