Chihiro (窪田千尋) Kubota
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13
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
33
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
37,6%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 2 030; Σ finishers = 5 392. 2 030 / 5 392 × 100 = 37.65%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed13
Km — ultra races1 395 km
> 100 km7
> 160 km5
Longest race167,0 km
4th Kumagawa Revival Trail — 15/11/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail100,0%
HISTORY
13 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 15.11 | 167km | 35:03:26 h | 34 | |
| 2024 | ||||
| 16.11 | 167km | 38:34:27 h | 94 | |
| 21.07 | 66km | 9:12:44 h | 12 | |
| 2023 | ||||
| 07.10 | 100mi | 35:10:17 h | 83 | |
| 17.09 | 110km | 18:19:15 h | 56 | |
| 21.04 | 167km | 32:35:51 h | 331 | |
| 11.03 | 167km | 40:07:06 h | 67 | |
| 2022 | ||||
| 05.03 | 101km | 17:00:37 h | 24 | |
| 2020 | ||||
| 13.12 | 66km | 9:57:43 h | 383 | |
| 2017 | ||||
| 12.11 | 50km | 8:25:01 h | 51 | |
| 10.09 | 50km | 7:52:45 h | 71 | |
| 25.06 | 72.7km | 12:46:48 h | 678 | |
| 2016 | ||||
| 02.10 | 50km | 7:14:58 h | 159 | |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 15/11/2025 | 4th Kumagawa Revival Trail | 167,00 | ×5 |
| ✓ 2 | 16/11/2024 | 3rd Kumagawa Revival Trail | 167,00 | ×5 |
| ✓ 3 | 21/4/2023 | 8th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×5 |
| ✓ 4 | 11/3/2023 | 2nd Kumagawa Revival Trail | 167,00 | ×5 |
| ✓ 5 | 7/10/2023 | 9th OSJ Koumi 100 | 160,93 | ×4 |
| ✓ 6 | 17/9/2023 | 15th Shinetsu Five Mountains Trail 110km | 110,00 | ×3 |
| ✓ 7 | 5/3/2022 | 1st Kumagawa Revival Trail | 101,00 | ×3 |
| ✓ 8 | 25/6/2017 | 4. Spatrail - Shima to Kusatsu | 72,70 | ×2 |
| ✓ 9 | 21/7/2024 | 12th Kirishima Ebino-kougen Extreme Trail | 66,00 | ×2 |
| ✓ 10 | 13/12/2020 | 7th Izu Trail Journey | 66,00 | ×2 |
| ✓ 11 | 12/11/2017 | 9th Kanna Mountain Run | 50,00 | ×1 |
| ✓ 12 | 10/9/2017 | 9th Shinshu-Togakushi Trail Run Race | 50,00 | ×1 |
| ✓ 13 | 2/10/2016 | 10th Madarao Forest Trails 50km | 50,00 | ×1 |