Takashi (平石崇) Hiraishi
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Ultrarunner since 2022
8
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
28
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
Japan10,4%
Rank quotient ?This runner's calculation uses 8 eligible race(s): Σ(rank − 1) = 226; Σ finishers = 2 169. 226 / 2 169 × 100 = 10.42%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed8
Km — ultra races960 km
> 100 km3
> 160 km2
Longest race200,0 km
9th Ultra Walking around Lake Biwa — 2/5/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road10,4%
Ult.Walk89,6%
Records
HISTORY
8 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 10.05 | 50km | 3rd One-day walking - Kansai |
7:52:07 h | 20 |
| 02.05 | 200km | 9th Ultra Walking around Lake Biwa |
44:43:05 h | 57 |
| 2025 | ||||
| 03.05 | 200km | 8th Ultra Walking around Lake Biwa |
43:26:58 h | 41 |
| 2023 | ||||
| 14.10 | 100km | 9th Lake Biwa Charity 100km Walking Tournament |
16:51:30 h | 8 |
| 03.05 | 100km | 5th Sunny Okayama 100km |
17:21:16 h | 29 |
| 2022 | ||||
| 26.11 | 110km | 1st Kyoto Ultra Walking 110km |
19:57:08 h | 13 |
| 15.10 | 100km | 8th Lake Biwa Charity 100km Walking Athlete |
21:24:23 h | 30 |
| 09.04 | 100km | 5th Ultra Walking around Lake Biwa |
20:06:24 h | 36 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 2/5/2026 | 9th Ultra Walking around Lake Biwa | 200,00 | ×7 |
| ✓ 2 | 3/5/2025 | 8th Ultra Walking around Lake Biwa | 200,00 | ×7 |
| ✓ 3 | 26/11/2022 | 1st Kyoto Ultra Walking 110km | 110,00 | ×3 |
| ✓ 4 | 14/10/2023 | 9th Lake Biwa Charity 100km Walking Tournament | 100,00 | ×3 |
| ✓ 5 | 3/5/2023 | 5th Sunny Okayama 100km | 100,00 | ×3 |
| ✓ 6 | 15/10/2022 | 8th Lake Biwa Charity 100km Walking Athlete | 100,00 | ×3 |
| ✓ 7 | 9/4/2022 | 5th Ultra Walking around Lake Biwa | 100,00 | ×3 |
| ✓ 8 | 10/5/2026 | 3rd One-day walking - Kansai | 50,00 | ×1 |