Ryo (玉井僚) Tamai
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Born : 1994
Cat. M23 Ultrarunner since 2019
15
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
40
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
2
Countries visited ?Japan
United States
JapanUnited States19,6%
Rank quotient ?This runner's calculation uses 15 eligible race(s): Σ(rank − 1) = 1 040; Σ finishers = 5 308. 1 040 / 5 308 × 100 = 19.59%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed15
Km — ultra races1 820 km
> 100 km10
> 160 km7
Longest race168,5 km
7th OSJ Koumi 100 — 9/10/2021
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road5,5%
Trail94,5%
HISTORY
15 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 17.01 | 100mi | 26th HURT 100 Endurance Run 100 Mile |
26:32:55 h | 12 |
| 2025 | ||||
| 13.09 | 162.2km | 17th Shinetsu Five Mountains Trail 100 mile |
25:50:18 h | 37 |
| 18.01 | 100mi | 25th HURT 100 Endurance Run 100 Mile |
29:05:04 h | 20 |
| 2024 | ||||
| 02.11 | 55mi | 16th Peacock Challenge 55 (PC 55) Mile Run |
12:27:44 h | 7 |
| 22.09 | 50km | 1st OSJ Ontake 50km |
4:44:42 h | 5 |
| 14.07 | 109.2km | 16th OSJ Ontake 100km Ultra Trail |
12:08:06 h | 44 |
| 13.01 | 100mi | 24th HURT 100 Endurance Run 100 Mile |
31:19:11 h | 25 |
| 2023 | ||||
| 16.09 | 162.6km | 15th Shinetsu Five Mountains Trail 100 mile |
24:26:27 h | 14 |
| 16.07 | 65km | 14th Nozawa Onsen 4100D Mountain Trail |
9:13:59 h | 14 |
| 02.06 | 103km | 2nd Tamba 100 Adventure Trail - 100km |
31:53:31 h | 25 |
| 2022 | ||||
| 17.09 | 162.6km | 14th Shinetsu Five Mountains Trail 100 mile |
27:55:06 h | 45 |
| 11.06 | 100.8km | 2nd Okushinano 100 |
13:39:41 h | 34 |
| 2021 | ||||
| 09.10 | 168.5km | 7th OSJ Koumi 100 |
33:50:19 h | 167 |
| 23.07 | 65km | 12th Nozawa Onsen 4100D Mountain Trail |
9:32:57 h | 68 |
| 2019 | ||||
| 19.05 | 100km | 7th Tokyo Shibamata 100 km |
11:54:59 h | 538 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 9/10/2021 | 7th OSJ Koumi 100 | 168,50 | ×4 |
| ✓ 2 | 16/9/2023 | 15th Shinetsu Five Mountains Trail 100 mile | 162,60 | ×4 |
| ✓ 3 | 17/9/2022 | 14th Shinetsu Five Mountains Trail 100 mile | 162,60 | ×4 |
| ✓ 4 | 13/9/2025 | 17th Shinetsu Five Mountains Trail 100 mile | 162,20 | ×4 |
| ✓ 5 | 17/1/2026 | 26th HURT 100 Endurance Run 100 Mile | 160,93 | ×4 |
| ✓ 6 | 18/1/2025 | 25th HURT 100 Endurance Run 100 Mile | 160,93 | ×4 |
| ✓ 7 | 13/1/2024 | 24th HURT 100 Endurance Run 100 Mile | 160,93 | ×4 |
| ✓ 8 | 14/7/2024 | 16th OSJ Ontake 100km Ultra Trail | 109,20 | ×2 |
| ✓ 9 | 2/6/2023 | 2nd Tamba 100 Adventure Trail - 100km | 103,00 | ×2 |
| ✓ 10 | 11/6/2022 | 2nd Okushinano 100 | 100,80 | ×2 |
| ✓ 11 | 19/5/2019 | 7th Tokyo Shibamata 100 km | 100,00 | ×2 |
| ✓ 12 | 2/11/2024 | 16th Peacock Challenge 55 (PC 55) Mile Run | 88,51 | ×2 |
| ✓ 13 | 16/7/2023 | 14th Nozawa Onsen 4100D Mountain Trail | 65,00 | ×1 |
| ✓ 14 | 23/7/2021 | 12th Nozawa Onsen 4100D Mountain Trail | 65,00 | ×1 |
| ✓ 15 | 22/9/2024 | 1st OSJ Ontake 50km | 50,00 | ×1 |