Yuichi (小川祐一) Ogawa
Born : 1976 Cat. M50 Ultrarunner since 2012 JPN
32
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
47
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
7,7%
Rank quotient ?This runner's calculation uses 32 eligible race(s): Σ(rank − 1) = 1 749; Σ finishers = 22 823. 1 749 / 22 823 × 100 = 7.66%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed32
Km — ultra races2 767 km
> 100 km9
> 160 km4
Longest race167,0 km

Km per year (ultra races)

434
5 races
2022
272
3 races
2023
272
3 races
2024
127
2 races
2025
50
1 race
2026

Race types (share of distance)

Road3,6%
Trail96,4%

Wins & podiums (ultra)

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

HISTORY

32 race(s)
DateRacePerf.Rk
2026
19.04 50km JPN8th Onigajo Peaks Trail 7:43:24 h8
2025
12.10 71.5km JPN33th Hasetsune Cup - Japan Mountain Endurance Race 11:55:55 h92
30.03 55km JPN7th Ishinomaki Tozan Marathon 55km 6:06:16 h3 🥉
2024
13.10 71.5km JPN32th Hasetsune Cup - Japan Mountain Endurance Race 9:50:51 h47
19.05 100km JPN30th Yatsugatake Nobeyama 100 km 9:43:34 h35
09.03 100km JPN9th Sengenyama 100 15:48:00 h2 🥈
2023
23.07 60km JPN1st Shin Daisetsuzan Trail Journey 7:49:40 h3 🥉
06.05 45km JPN2nd Karuizawa Trail Running Race 5:15:41 h11
21.04 167km JPN8th Ultra-Trail Mt. Fuji 26:04:39 h46
2022
09.10 71.5km JPN30th Hasetsune Cup - Japan Mountain Endurance Race 11:13:05 h123
18.09 109km JPN14th Shinetsu Five Mountains Trail 110km 16:56:17 h32
16.07 100mi JPN14th OSJ Ontake 100 Mile Ultra Trail 20:25:53 h12
25.06 48km JPN1st KTF Trail running race - Rockin Bear 5:09:08 h9
27.05 45km JPN1st Karuizawa Trail Running Race 5:20:00 h9
2021
12.12 69.1km JPN8th Izu Trail Journey 7:45:44 h41
13.03 103.5km JPN3rd Sengenyama 100 15:47:00 h1 🏆
2020
14.11 100Miles JPN2nd Sengenyama 100 26:44:00 h5
18.10 54km JPN7th Shigakogen Extreme Trail 7:47:36 h44
2019
08.12 71.7km JPN6th Izu Trail Journey 6:57:53 h21
07.04 70km JPN5th Okumikawa Power Trail 8:47:17 h16
2018
07.10 71.5km JPN26th Hasetsune Cup - Japan Mountain Endurance Race 13:38:44 h218
15.09 100mi JPN10th Shinetsu Five Mountains Trail 100 mile 26:01:00 h45
2017
08.10 71.5km JPN25th Hasetsune Cup - Japan Mountain Endurance Race 10:19:03 h47
16.09 102km JPN9th Shinetsu Five Mountains Trail 100 mile 13:26:36 h19
15.07 100km JPN10th OSJ Ontake 100km Ultra Trail 9:55:23 h7
23.04 70km JPN3rd Okumikawa Power Trail 8:33:50 h15
2016
09.10 71.5km JPN24th Hasetsune Cup - Japan Mountain Endurance Race 11:07:07 h118
18.09 110km JPN8th Shinetsu Five Mountains Trail 110km 12:22:16 h17
2015
21.11 104km JPN1st FunTrails100K Round 20:22:53 h41
2013
29.09 50km JPN3rd SkyView Ultra-Trail 9:22:09 h194
10.03 72km JPN1st Izu Trail Journey 10:06:27 h215
2012
20.05 100km JPN18th Yatsugatake Nobeyama 100 km 12:02:26 h285