Tomonobu (小泉友重) Koizumi
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Born : 1978
Cat. M45 Ultrarunner since 2016
9
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
25
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
Japan57,7%
Rank quotient ?This runner's calculation uses 9 eligible race(s): Σ(rank − 1) = 2 745; Σ finishers = 4 754. 2 745 / 4 754 × 100 = 57.74%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed9
Km — ultra races743 km
> 100 km2
> 160 km1
Longest race167,0 km
8th Ultra-Trail Mt. Fuji (UTMF) — 21/4/2023
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road13,5%
Trail86,5%
Records
HISTORY
9 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2023 | ||||
| 21.04 | 167km | 8th Ultra-Trail Mt. Fuji |
40:49:14 h | 1063 |
| 2022 | ||||
| 18.09 | 109km | 14th Shinetsu Five Mountains Trail 110km |
21:39:56 h | 277 |
| 2019 | ||||
| 21.09 | 75km | 6th SkyView Ultra-Trail 70 - Yamada Noboru Memorial Cup |
17:08:08 h | 211 |
| 13.07 | 65km | 10th Nozawa Onsen 4100D Mountain Trail |
11:37:00 h | 131 |
| 2018 | ||||
| 14.10 | 73km | 4th Gasando Trail running race |
11:49:33 h | 134 |
| 09.09 | 51.4km | 8th Hakuba Int. Trail Run |
8:18:18 h | 265 |
| 2017 | ||||
| 10.09 | 100km | 5th 100 km Ultramarathon Hakusan-Shirakawago |
13:50:37 h | 500 |
| 18.06 | 53km | 3rd Echigo Country Trail |
8:06:33 h | 121 |
| 2016 | ||||
| 06.11 | 50km | 3rd Nakanoto Treasure Trail Run Festival |
7:42:52 h | 52 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 21/4/2023 | 8th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×6 |
| ✓ 2 | 18/9/2022 | 14th Shinetsu Five Mountains Trail 110km | 109,00 | ×4 |
| ✓ 3 | 10/9/2017 | 5th 100 km Ultramarathon Hakusan-Shirakawago | 100,00 | ×4 |
| ✓ 4 | 21/9/2019 | 6th SkyView Ultra-Trail 70 - Yamada Noboru Memorial Cup | 75,00 | ×3 |
| ✓ 5 | 14/10/2018 | 4th Gasando Trail running race | 73,00 | ×2 |
| ✓ 6 | 13/7/2019 | 10th Nozawa Onsen 4100D Mountain Trail | 65,00 | ×2 |
| ✓ 7 | 18/6/2017 | 3rd Echigo Country Trail | 53,00 | ×2 |
| ✓ 8 | 9/9/2018 | 8th Hakuba Int. Trail Run | 51,40 | ×2 |
| ✓ 9 | 6/11/2016 | 3rd Nakanoto Treasure Trail Run Festival | 50,00 | ×2 |