Takeo (薄井猛生) Usui
ID 310716
Born : 1971 Cat. M55 Ultrarunner since 2012 JPN
43
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
68
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
23,1%
Rank quotient ?This runner's calculation uses 43 eligible race(s): Σ(rank − 1) = 3 873; Σ finishers = 16 753. 3 873 / 16 753 × 100 = 23.12%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed43
Km — ultra races6 148 km
> 100 km25
> 160 km20
> 200 km8
> 24h2
Longest race300,0 km
4th Round of the Boso Peninsula 300K — 18/7/2026

Km per year (ultra races)

756
5 races
2022
1 081
5 races
2023
956
6 races
2024
650
4 races
2025
518
2 races
2026

Race types (share of distance)

Road69,5%
Trail30,5%

Wins & podiums (ultra)

🏆 Win2
🏆 Win M2
🏅 Top 35
🏅 Top 3 M5
Longest winning streak1
Current streak0

Records

50 km5h15'00100 km9h44'42100 mi20h43'1724 h217,57 km

HISTORY

43 race(s)
DateRacePerf.Rk
2026
18.07 300km JPN4th Round of the Boso Peninsula 300K 2d 06:04:45 h10
28.03 24h JPN17th Jingu Gaien 24 Hour Challenge 217.574 km8
2025
08.11 128km JPN6th Tokyo Great Race 13:57:49 h1 🏆
12.10 100mi JPN11th OSJ Koumi 100 32:50:36 h55
19.07 100mi JPN17th OSJ Ontake 100 Mile Ultra Trail 20:43:17 h40
15.03 200km JPN15th Little Edo Oedo 200k 25:50:17 h13
2024
02.11 250km JPN5th Tokyo Great Race 250km RE 36:29:09 h3 🥉
13.10 71.5km JPN32th Hasetsune Cup - Japan Mountain Endurance Race 12:30:49 h240
14.09 250km JPN7th Utsukushima Fukushima Journey Run 250K 41:14:37 h11
25.08 75km JPN11th Tsukuba Renjyo 70 km Road & Trail Run 9:56:25 h17
14.07 109.2km JPN16th OSJ Ontake 100km Ultra Trail 12:25:15 h61
09.03 200km JPN14th Little Edo Oedo 200k 24:53:52 h6
2023
03.11 250km JPN4th Tokyo Great Race 250km RE 35:50:33 h2 🥈
16.09 251km JPN6th Utsukushima Fukushima Journey Run 251K 40:36:19 h5
15.07 280km JPN1st Round of the Boso Peninsula 280K 2d 04:55:55 h9
21.03 100km JPN1st Akagiyama 100 14:43:02 h43
11.03 200km JPN13th Little Edo Oedo 200k 24:46:00 h9
2022
05.11 128km JPN3rd Tokyo Great Race 128km 14:35:12 h1 🏆
08.10 100mi JPN8th OSJ Koumi 100 32:28:14 h31
04.06 100km JPN2nd Minakami Trail Race - 100km 23:17:46 h32
22.04 167km JPN7th Ultra-Trail Mt. Fuji 26:46:29 h130
12.03 200km JPN12th Little Edo Oedo 200k 24:52:20 h6
2021
09.10 168.5km JPN7th OSJ Koumi 100 31:54:24 h106
17.07 24h JPN1st Japan Trophy 24h 192.500 km15
27.02 200km JPN11th Little Edo Oedo 200k 24:44:29 h7
2020
22.02 206km JPN10th Little Edo Oedo 205k 25:03:59 h8
2019
06.07 100km JPN0. Jungle Guruguru Max - 100 km 28:32:11 h25
15.06 161.6km JPN1st Nikko Sennin Concentric Journey Run 24:02:52 h16
01.06 59km JPN11th OSJ Okukuji Trail 60k 11:31:59 h123
24.03 100km JPN1st Ibaraki 100k Ultra Marathon 9:44:42 h83
2018
03.06 78km JPN25. Ultramarathon Okumusashi 8:18:08 h197
2017
29.07 102km JPN1st OSJ Itamuro 100 21:17:52 h54
02.07 100km JPN1st Nikko 100km Ultramarathon 11:23:17 h206
04.06 78km JPN24. Ultramarathon Okumusashi 8:40:12 h364
27.05 50km JPN9th OSJ Okukuji Trail 50k 11:33:03 h129
2016
19.11 105km JPN2nd FunTrails100K Round 21:45:05 h77
05.06 78km JPN23. Ultramarathon Okumusashi 8:26:48 h362
28.05 50km JPN8th OSJ Okukuji Trail 50k 11:12:47 h108
2015
22.06 77km JPN22. Ultramarathon Okumusashi 9:37:21 h716
30.05 50km JPN7th OSJ Okukuji Trail 50k 11:39:53 h113
2014
20.09 50km JPN17th Jonaizaka 50 km Ultra Marathon 5:15:00 h2 🥈
28.06 100km JPNFukushima-Nasu Long Trail 23:37:51 h79
2012
19.05 82km JPN1st Shizuoka to Yamanashi 19:19:52 h393