Shuhei (岩口周平) Iwaguchi
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Born : 1992
Cat. M23 Ultrarunner since 2016
9
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
26
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
Japan10,8%
Rank quotient ?This runner's calculation uses 9 eligible race(s): Σ(rank − 1) = 673; Σ finishers = 6 219. 673 / 6 219 × 100 = 10.82%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed9
Km — ultra races796 km
> 100 km3
> 160 km1
Longest race167,0 km
10th Ultra-Trail Mt. Fuji (UTMF) — 25/4/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road12,6%
Trail71,7%
Ult.Walk15,7%
Records
HISTORY
9 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 06.06 | 125km | 10th Fujisan Issyu Walking |
26:25:57 h | 204 |
| 2025 | ||||
| 25.04 | 167km | 10th Ultra-Trail Mt. Fuji |
27:57:31 h | 95 |
| 2024 | ||||
| 07.09 | 53.4km | 17th OSJ Adatara Trail 50K |
10:40:34 h | 44 |
| 2023 | ||||
| 05.11 | 68km | 7th Koshu Alps Haute Route Challenge |
11:43:03 h | 12 |
| 16.07 | 109.2km | 15th OSJ Ontake 100km Ultra Trail |
14:46:20 h | 131 |
| 2022 | ||||
| 23.10 | 54km | 9th Shigakogen Extreme Trail |
7:59:55 h | 12 |
| 04.09 | 50km | 11th Hakuba Int. Trail Run |
6:10:48 h | 20 |
| 2021 | ||||
| 12.12 | 69.1km | 8th Izu Trail Journey |
8:38:24 h | 107 |
| 2016 | ||||
| 16.10 | 100km | 22nd River Shimanto 100km |
8:55:23 h | 57 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 25/4/2025 | 10th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×6 |
| ✓ 2 | 6/6/2026 | 10th Fujisan Issyu Walking | 125,00 | ×4 |
| ✓ 3 | 16/7/2023 | 15th OSJ Ontake 100km Ultra Trail | 109,20 | ×4 |
| ✓ 4 | 16/10/2016 | 22nd River Shimanto 100km | 100,00 | ×3 |
| ✓ 5 | 12/12/2021 | 8th Izu Trail Journey | 69,10 | ×2 |
| ✓ 6 | 5/11/2023 | 7th Koshu Alps Haute Route Challenge | 68,00 | ×2 |
| ✓ 7 | 23/10/2022 | 9th Shigakogen Extreme Trail | 54,00 | ×2 |
| ✓ 8 | 7/9/2024 | 17th OSJ Adatara Trail 50K | 53,40 | ×2 |
| ✓ 9 | 4/9/2022 | 11th Hakuba Int. Trail Run | 50,00 | ×1 |