Shohei (岩井昇平) Iwai
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Born : 1989
Cat. M35 Ultrarunner since 2019
11
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
Japan8,7%
Rank quotient ?This runner's calculation uses 11 eligible race(s): Σ(rank − 1) = 464; Σ finishers = 5 355. 464 / 5 355 × 100 = 8.66%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed11
Km — ultra races794 km
> 100 km1
> 160 km1
> 24h1
Longest race167,0 km
11th Ultra-Trail Mt. Fuji (UTMF) — 24/4/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road18,3%
Trail81,7%
HISTORY
11 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 24.04 | 167km | 11th Ultra-Trail Mt. Fuji |
28:44:52 h | 108 |
| 2025 | ||||
| 15.11 | 50km | 11th FunTrails50K Round |
6:46:14 h | 16 |
| 02.11 | 50km | 11th Nakanoto Treasure Trail Run Festival |
5:18:44 h | 6 |
| 20.09 | 80km | 11th SkyViewTrail Memorial Cup |
10:27:42 h | 9 |
| 26.04 | 70km | 4th KAI 70k |
10:11:06 h | 57 |
| 2024 | ||||
| 22.09 | 75km | 2nd Mina no Tenku Ultra Marathon |
7:21:24 h | 6 |
| 25.08 | 48km | 11th Tsukuba Renjyo 48 km Road & Trail Run |
6:12:51 h | 32 |
| 2021 | ||||
| 12.12 | 69.1km | 8th Izu Trail Journey |
8:59:50 h | 154 |
| 17.11 | 50km | 3rd Saioto Colors |
6:54:59 h | 4 |
| 20.03 | 24h | 1st GGR-solo-24h |
70.200 km | 18 |
| 2019 | ||||
| 19.05 | 65km | 4th Osorakan-Trail |
10:39:58 h | 65 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 24/4/2026 | 11th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×6 |
| ✓ 2 | 20/9/2025 | 11th SkyViewTrail Memorial Cup | 80,00 | ×3 |
| ✓ 3 | 22/9/2024 | 2nd Mina no Tenku Ultra Marathon | 75,00 | ×3 |
| ✓ 4 | 20/3/2021 | 1st GGR-solo-24h | 70,20 | ×2 |
| ✓ 5 | 26/4/2025 | 4th KAI 70k | 70,00 | ×2 |
| ✓ 6 | 12/12/2021 | 8th Izu Trail Journey | 69,10 | ×2 |
| ✓ 7 | 19/5/2019 | 4th Osorakan-Trail | 65,00 | ×2 |
| ✓ 8 | 15/11/2025 | 11th FunTrails50K Round | 50,00 | ×2 |
| ✓ 9 | 2/11/2025 | 11th Nakanoto Treasure Trail Run Festival | 50,00 | ×2 |
| ✓ 10 | 17/11/2021 | 3rd Saioto Colors | 50,00 | ×2 |
| ✓ 11 | 25/8/2024 | 11th Tsukuba Renjyo 48 km Road & Trail Run | 48,00 | ×1 |