Tsukasa (廣井司) Hiroi
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19
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
40
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
39,4%
Rank quotient ?This runner's calculation uses 19 eligible race(s): Σ(rank − 1) = 1 538; Σ finishers = 3 907. 1 538 / 3 907 × 100 = 39.37%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed19
Km — ultra races1 958 km
> 100 km10
Longest race125,0 km
9th Fujisan Issyu Walking — 7/6/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road41,9%
Ult.Walk58,1%
Records
HISTORY
19 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 7/6/2025 | 9th Fujisan Issyu Walking | 125,00 | ×3 |
| ✓ 2 | 25/5/2024 | 8th Fujisan Issyu Walking | 125,00 | ×3 |
| ✓ 3 | 10/6/2023 | 7th Fujisan Issyu Walking | 125,00 | ×3 |
| ✓ 4 | 23/3/2024 | 7th Lake Kasumigaura Ultra Run | 115,00 | ×2 |
| ✓ 5 | 13/7/2024 | 4th Nihondaira and Suruganokuni Ultra Run | 105,00 | ×2 |
| ✓ 6 | 23/2/2024 | 1st Osaka Ultra Walking | 104,00 | ×2 |
| ✓ 7 | 23/11/2024 | 3rd Kyoto Ultra Walking 110km | 103,00 | ×2 |
| ✓ 8 | 5/4/2025 | 4th Miura-Halbinsel-Tour Ultra Walking | 102,00 | ×2 |
| ✓ 9 | 11/1/2025 | 2nd Nara Mahoroba Ultra Walking | 102,00 | ×2 |
| ✓ 10 | 27/4/2024 | 3rd Miura-Halbinsel-Tour Ultra Walking | 102,00 | ×2 |
| ✓ 11 | 25/10/2025 | 7th Tsurugashima 100km | 100,00 | ×2 |
| ✓ 12 | 12/10/2024 | 7th Nakasendo to Kisoji Ultra Run | 100,00 | ×2 |
| ✓ 13 | 14/9/2024 | 10th Nishi Seto Expressway Ultra Run | 100,00 | ×2 |
| ✓ 14 | 13/1/2024 | 1st Nara Mahoroba Ultra Walking | 100,00 | ×2 |
| ✓ 15 | 18/11/2023 | 1st Owari Mikawa Ultra Walking | 100,00 | ×2 |
| ✓ 16 | 28/10/2023 | 5th Tsurugashima 100km | 100,00 | ×2 |
| ✓ 17 | 14/10/2023 | 6th Nakasendo to Kisoji Ultra Run | 100,00 | ×2 |
| ✓ 18 | 16/9/2023 | 9th Nishi Seto Expressway Ultra Run | 100,00 | ×2 |
| ✓ 19 | 15/6/2024 | 1st One Day Walking | 50,00 | ×1 |