Kazuhiro (千坂和洋) Chisaka
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Born : 1984
Cat. M40 Ultrarunner since 2013
7
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
19
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
3
Countries visited ?Japan
South Korea
Taiwan
JapanSouth KoreaTaiwan42,6%
Rank quotient ?This runner's calculation uses 7 eligible race(s): Σ(rank − 1) = 1 934; Σ finishers = 4 541. 1 934 / 4 541 × 100 = 42.59%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed7
Km — ultra races452 km
> 100 km1
Longest race100,8 km
6th Okushinano 100 — 6/6/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road14,6%
Trail85,4%
Records
HISTORY
7 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 6/6/2026 | 6th Okushinano 100 | 100,80 | ×5 |
| ✓ 2 | 18/10/2025 | 12th TransJeju by UTMB - Jeju70K | 67,00 | ×3 |
| ✓ 3 | 29/9/2013 | 16th Muraoka 66 km Ultra Marathon | 66,00 | ×3 |
| ✓ 4 | 20/6/2026 | 2nd Kaga Spa by UTMB - Kaga Spa Trail Endurance 50 | 58,00 | ×3 |
| ✓ 5 | 21/6/2025 | 1st Kaga Spa by UTMB - Kaga Spa Trail Endurance 50 | 58,00 | ×3 |
| ✓ 6 | 7/3/2026 | 1st Xtrail Kenting by UTMB - Xtrail 50K | 52,00 | ×2 |
| ✓ 7 | 24/5/2026 | 11th Akiyoshidai Karst Trail Run | 50,00 | ×2 |