Ryouzou (大木良三) Ohki
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Ultrarunner since 2002
7
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
20
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
Japan46,9%
Rank quotient ?This runner's calculation uses 7 eligible race(s): Σ(rank − 1) = 1 064; Σ finishers = 2 267. 1 064 / 2 267 × 100 = 46.93%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed7
Km — ultra races465 km
Longest race100,0 km
8th Yatsugatake Nobeyama 100 km — 12/5/2002
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road63,2%
Trail36,8%
Records
HISTORY
7 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2020 | ||||
| 19.01 | 50km | 30th Miyako 50 km Ultramarathon |
6:59:02 h | 150 |
| 2017 | ||||
| 15.01 | 50km | 27th Miyako 50 km Ultramarathon |
6:22:06 h | 77 |
| 2016 | ||||
| 17.01 | 50km | 26th Miyako 50 km Ultramarathon |
6:11:08 h | 57 |
| 2011 | ||||
| 30.04 | 72km | 21st Fuji 5 Lakes 72 km Challenge |
9:48:54 h | 360 |
| 2010 | ||||
| 25.04 | 72km | 20th Fuji 5 Lakes 72 km Challenge |
9:44:22 h | 291 |
| 2007 | ||||
| 20.05 | 71km | 13th Yatsugatake Nobeyama 71 km |
7:03:44 h | 21 |
| 2002 | ||||
| 12.05 | 100km | 8th Yatsugatake Nobeyama 100 km |
11:35:06 h | 115 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 12/5/2002 | 8th Yatsugatake Nobeyama 100 km | 100,00 | ×5 |
| ✓ 2 | 30/4/2011 | 21st Fuji 5 Lakes 72 km Challenge | 72,00 | ×3 |
| ✓ 3 | 25/4/2010 | 20th Fuji 5 Lakes 72 km Challenge | 72,00 | ×3 |
| ✓ 4 | 20/5/2007 | 13th Yatsugatake Nobeyama 71 km | 71,00 | ×3 |
| ✓ 5 | 19/1/2020 | 30th Miyako 50 km Ultramarathon | 50,00 | ×2 |
| ✓ 6 | 15/1/2017 | 27th Miyako 50 km Ultramarathon | 50,00 | ×2 |
| ✓ 7 | 17/1/2016 | 26th Miyako 50 km Ultramarathon | 50,00 | ×2 |