Kazuhiko (小澤和彦) Ozawa
ID 42052
Born : 1965 Cat. M60 Ultrarunner since 2007 JPN
36
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
62
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
3
Countries visited ?FRAFranceGREGreeceJPNJapan
13,2%
Rank quotient ?This runner's calculation uses 36 eligible race(s): Σ(rank − 1) = 3 195; Σ finishers = 24 206. 3 195 / 24 206 × 100 = 13.20%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed36
Km — ultra races4 780 km
> 100 km20
> 160 km14
> 200 km8
> 24h8
Longest race250,0 km
16. Sakura Michi Kokusai Nature Run — 18/4/2009

Km per year (ultra races)

167
1 race
2022
2023
80
1 race
2024
189
1 race
2025
2026

Race types (share of distance)

Road59,4%
Trail40,6%

Wins & podiums (ultra)

🏆 Win1
🏆 Win M1
🏅 Top 34
🏅 Top 3 M4
Longest winning streak1
Current streak0

Records

50 km12h25'01100 km9h28'5450 mi14h03'42100 mi25h39'556 h77,23 km12 h135,97 km24 h243,19 km

HISTORY

38 race(s) · 2 split(s) nested
DateRacePerf.Rk
2025
08.03 24h JPN16th Jingu Gaien 24 Hour Challenge 188.740 km28
2024
22.09 80km JPN10th SkyViewTrail Memorial Cup 14:03:42 h55
2022
22.04 167km JPN7th Ultra-Trail Mt. Fuji 29:19:13 h230
2018
02.06 50km JPN10th OSJ Okukuji Trail 50k 12:25:01 h140
2017
11.11 24h JPN12th Jingu Gaien 24 Hour Challenge 139.037 km94
08.10 71.5km JPN25th Hasetsune Cup - Japan Mountain Endurance Race 17:59:59 h1030
2016
16.07 65km JPN7th Nozawa Onsen 4100D Mountain Trail 8:35:20 h20
05.03 204km JPN6th Little Edo Oedo 200k 24:36:49 h6
2015
31.10 71.5km JPN23rd Hasetsune Cup - Japan Mountain Endurance Race 9:56:58 h99
25.09 170.3km JPN4th Ultra-Trail Mt. Fuji 32:59:29 h121
28.08 170km FRA13ème Ultra Trail Tour du Mont Blanc 39:25:10 h626
2014
12.10 71.5km JPN22nd Hasetsune Cup - Japan Mountain Endurance Race 9:57:38 h103
27.07 77km JPN21. Ultramarathon Okumusashi 7:31:13 h46
28.06 100km JPNFukushima-Nasu Long Trail 16:03:40 h14
25.04 100mi JPN3rd Ultra-Trail Mt. Fuji 27:25:39 h39
2013
13.10 71.5km JPN21st Hasetsune Cup - Japan Mountain Endurance Race 8:57:02 h36
15.09 110km JPN5th Shinetsu Five Mountains Trail 110km 13:03:28 h15
28.07 77km JPN20. Ultramarathon Okumusashi 7:28:33 h102
26.04 100mi JPN2nd Ultra-Trail Mount Fuji 25:39:55 h32
2012
07.10 24h JPN7th Jingu Gaien 24 Hour Challenge 228.903 km9
01.09 6h JPN15. Hiratsuka 6 hour race 72.660 km7
05.08 77km JPN19. Ultramarathon Okumusashi 6:37:06 h19
16.06 24h JPN11. Tokyo Challenge 24 hours 129.360 km48
20.05 100km JPN18th Yatsugatake Nobeyama 100 km 9:28:54 h19
22.04 112km JPN22nd Fuji 5 Lakes 112 km Challenge 9:36:48 h6
2011
15.10 24h JPN6th Jingu Gaien 24 Hour Challenge 219.142 km11
07.08 77km JPN18. Ultramarathon Okumusashi 6:35:54 h34
11.06 12h JPN10. Tokyo Challenge 12 hours 135.974 km1 🏆
30.04 112km JPN21st Fuji 5 Lakes 112 km Challenge 9:27:42 h5
2010
13.05 6h FRAIAU 24h WC Brive (Les 24 heures de Brive) - 6h Split 70.409 km16
13.05 12h FRAIAU 24h WC Brive (Les 24 heures de Brive) - 12h Split 123.070 km64
13.05 24h FRAIAU 24h WC Brive (Les 24 heures de Brive) 220.187 km59
2009
11.10 71.5km JPN17th Hasetsune Cup - Japan Mountain Endurance Race 10:45:30 h108
12.09 24h JPN4th Jingu Gaien 24 Hour Challenge 243.193 km2 🥈
13.06 6h JPN8. Tokyo Challenge 6 hours 77.230 km2 🥈
18.04 250km JPN16. Sakura Michi Kokusai Nature Run 34:03:00 h42
2008
26.09 245.3km GRE26. Spartathlon 30:34:54 h21
2007
14.09 24h JPN10. Hiratsuka 24 hour race 202.410 km2 🥈