Ryoji (大澤亮二) Osawa
Born : 1972 Cat. M50 Ultrarunner since 2012 JPN
25
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
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 ?JPNJapan
76,6%
Rank quotient ?This runner's calculation uses 25 eligible race(s): Σ(rank − 1) = 19 102; Σ finishers = 24 948. 19 102 / 24 948 × 100 = 76.57%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed25
Km — ultra races2 899 km
> 100 km11
> 160 km5
> 200 km2
Longest race276,0 km

Km per year (ultra races)

203
2 races
2022
317
2 races
2023
100
1 race
2024
273
2 races
2025
100
1 race
2026

Race types (share of distance)

Road97,6%
Trail2,4%

HISTORY

25 race(s)
DateRacePerf.Rk
2026
28.06 100km JPN41. Lake Saroma 100 km Ultramarathon 12:55:27 h2486
2025
29.06 100km JPN40. Lake Saroma 100 km Ultramarathon 12:55:56 h1842
04.05 173km JPN19th Nagasaki Tachibana Gulf Coast Super Maranic 173 30:48:40 h46
2024
30.06 100km JPN39. Lake Saroma 100 km Ultramarathon 12:57:25 h1757
2023
25.06 100km JPN38. Lake Saroma 100 km Ultramarathon 12:35:52 h1413
03.05 217km JPN17th Nagasaki Tachibana Gulf Coast Super Maranic 217 36:18:14 h29
2022
21.11 103km JPN16th Nagasaki Tachibana Gulf Coast Super Maranic 103 17:58:12 h64
22.05 100km JPN28th Yatsugatake Nobeyama 100 km 13:45:28 h826
2019
01.11 276km JPNTachibana Bay Coast 273 Ultra Marathon 2d 06:42:00 h41
17.08 101km JPN7th World Cultural Heritage "Fuji" Foot Race 15:37:44 h108
04.05 173km JPN13th Nagasaki Tachibana Gulf Coast Super Maranic 173 29:42:50 h45
2018
02.11 105km JPNTachibana Bay Coast 105 Ultra Marathon 15:51:31 h146
24.06 100km JPN33. Lake Saroma 100 km Ultramarathon 12:58:40 h2370
04.05 173km JPN12th Nagasaki Tachibana Gulf Coast Super Maranic 173 30:48:50 h58
2017
03.11 105km JPNTachibana Bay Coast 105 Ultra Marathon 15:33:25 h68
25.06 100km JPN32. Lake Saroma 100 km Ultramarathon 12:50:06 h1986
2016
04.11 103km JPNTachibana Bay Coast 100 Ultra Marathon 16:02:06 h142
18.09 60km JPN16th Tango 60 km Ultramarathon 8:12:39 h519
26.06 100km JPN31. Lake Saroma 100 km Ultramarathon 11:57:58 h1532
22.05 71km JPN22nd Yatsugatake Nobeyama 71 km 9:57:24 h102
04.05 129km JPN10th Nagasaki Tachibana Gulf Coast Super Maranic 173 21:20:55 h124
2015
28.06 100km JPN30. Lake Saroma 100 km Ultramarathon 12:12:50 h1716
2014
29.06 100km JPN29. Lake Saroma 100 km Ultramarathon 12:45:59 h1434
01.06 60km JPN2nd Tokyo Shibamata 60 km 7:11:31 h156
2012
24.06 50km JPN27. Lake Saroma 50 km Ultramarathon 5:43:17 h117