Dai (山本悌) Yamamoto
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Born : 1984
Cat. M40 Ultrarunner since 2022
12
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
Japan36,9%
Rank quotient ?This runner's calculation uses 12 eligible race(s): Σ(rank − 1) = 2 934; Σ finishers = 7 947. 2 934 / 7 947 × 100 = 36.92%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed12
Km — ultra races1 013 km
> 100 km3
> 160 km1
Longest race167,0 km
9th Ultra-Trail Mt. Fuji (UTMF) — 26/4/2024
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road19,8%
Trail80,2%
Records
HISTORY
12 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 17.05 | 100km | 32th Yatsugatake Nobeyama 100 km |
12:55:29 h | 550 |
| 2025 | ||||
| 14.09 | 112.7km | 17th Shinetsu Five Mountains Trail 110km |
20:11:23 h | 119 |
| 05.07 | 100km | 3rd Shiga Kogen 100 |
21:36:54 h | 121 |
| 07.06 | 52.4km | 5th Okushinano 100 - 50 km |
6:39:17 h | 35 |
| 2024 | ||||
| 08.12 | 70km | 11th Izu Trail Journey |
10:30:41 h | 381 |
| 08.06 | 52.4km | 4th Okushinano 100 - 50 km |
7:32:27 h | 73 |
| 26.04 | 167km | 9th Ultra-Trail Mt. Fuji |
39:20:46 h | 699 |
| 2023 | ||||
| 17.09 | 110km | 15th Shinetsu Five Mountains Trail 110km |
20:27:30 h | 119 |
| 10.06 | 50km | 3rd Okushinano 100 - 50 km |
7:34:32 h | 50 |
| 13.05 | 50km | 9th Mt. Hiei Int. 50 km Trail Run |
9:35:28 h | 303 |
| 16.04 | 100km | 33th Fuji 4 Lakes 100 km Challenge |
12:19:21 h | 426 |
| 2022 | ||||
| 25.06 | 48km | 1st KTF Trail running race - Rockin Bear |
6:49:28 h | 70 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 26/4/2024 | 9th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×5 |
| ✓ 2 | 14/9/2025 | 17th Shinetsu Five Mountains Trail 110km | 112,70 | ×4 |
| ✓ 3 | 17/9/2023 | 15th Shinetsu Five Mountains Trail 110km | 110,00 | ×3 |
| ✓ 4 | 17/5/2026 | 32th Yatsugatake Nobeyama 100 km | 100,00 | ×3 |
| ✓ 5 | 5/7/2025 | 3rd Shiga Kogen 100 | 100,00 | ×3 |
| ✓ 6 | 16/4/2023 | 33th Fuji 4 Lakes 100 km Challenge | 100,00 | ×3 |
| ✓ 7 | 8/12/2024 | 11th Izu Trail Journey | 70,00 | ×2 |
| ✓ 8 | 7/6/2025 | 5th Okushinano 100 - 50 km | 52,40 | ×1 |
| ✓ 9 | 8/6/2024 | 4th Okushinano 100 - 50 km | 52,40 | ×1 |
| ✓ 10 | 10/6/2023 | 3rd Okushinano 100 - 50 km | 50,00 | ×1 |
| ✓ 11 | 13/5/2023 | 9th Mt. Hiei Int. 50 km Trail Run | 50,00 | ×1 |
| ✓ 12 | 25/6/2022 | 1st KTF Trail running race - Rockin Bear | 48,00 | ×1 |