Satoshi (今井聡) Imai
Born : 1966 Cat. M60 Ultrarunner since 2011 JPN
50
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
59
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 ?HKGHong KongJPNJapanKORSouth Korea
25,2%
Rank quotient ?This runner's calculation uses 50 eligible race(s): Σ(rank − 1) = 10 518; Σ finishers = 41 764. 10 518 / 41 764 × 100 = 25.18%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed50
Km — ultra races5 081 km
> 100 km13
> 160 km6
> 200 km3
Longest race204,0 km

Km per year (ultra races)

267
2 races
2022
303
4 races
2023
476
4 races
2024
260
3 races
2025
90
1 race
2026

Race types (share of distance)

Road51,7%
Trail48,3%

HISTORY

50 race(s)
DateRacePerf.Rk
2026
14.03 90km JPN16th Little Edo 90k 11:43:58 h22
2025
15.11 80km HKG12th TransLantau 80 by UTMB 17:27:18 h157
25.10 80km JPN5. Jungle Guruguru Max - 80 km 16:05:18 h12
18.05 100km JPN31th Yatsugatake Nobeyama 100 km 12:45:44 h478
2024
12.10 100km KOR11th TransJeju by UTMB 100 18:11:46 h151
14.07 109.2km JPN16th OSJ Ontake 100km Ultra Trail 14:51:07 h289
19.05 100km JPN30th Yatsugatake Nobeyama 100 km 13:24:24 h696
26.04 167km JPN9th Ultra-Trail Mt. Fuji 37:23:27 h496
2023
14.10 80km JPN3. Jungle Guruguru Max - 80 km 15:03:58 h6
01.10 52km JPN10th Trainic world Soto-Chichibu Trail Run 50km 8:59:37 h49
21.05 100km JPN29th Yatsugatake Nobeyama 100 km 12:46:35 h284
08.04 71km JPN18th Toda Saiko 70 km 7:25:33 h82
2022
22.05 100km JPN28th Yatsugatake Nobeyama 100 km 13:08:15 h514
22.04 167km JPN7th Ultra-Trail Mt. Fuji 34:59:02 h587
2021
09.10 168.5km JPN7th OSJ Koumi 100 34:56:17 h224
27.02 91km JPN11th Little Edo 91k 9:54:33 h6
2020
24.10 146km JPN2nd Autumn leaves in Okumusashi / Chichibu Journey run 20:04:40 h44
22.02 115km JPN10th Oedo Night run 115k 13:27:22 h8
2019
19.10 51.4km JPN10th Inagawa 100km Ultra-Marathon 7:45:41 h493
23.06 72.6km JPN6. Spatrail - Shima to Kusatsu 72K 10:39:34 h155
19.05 100km JPN25th Yatsugatake Nobeyama 100 km 12:53:58 h763
23.02 204km JPN9th Little Edo Oedo 200k 30:48:07 h78
2018
24.06 72.7km JPN5. Spatrail - Shima to Kusatsu 10:51:39 h127
03.06 78km JPN25. Ultramarathon Okumusashi 8:12:55 h182
20.05 100km JPN24th Yatsugatake Nobeyama 100 km 12:14:56 h443
2017
23.09 129km JPN4th SkyView Ultra-Trail 120 - Yamada Noboru Memorial Cup 30:03:11 h270
25.06 72.7km JPN4. Spatrail - Shima to Kusatsu 10:18:09 h148
04.06 78km JPN24. Ultramarathon Okumusashi 7:17:17 h92
21.05 100km JPN23rd Yatsugatake Nobeyama 100 km 11:34:36 h199
2016
13.11 50km JPN8th Kanna Mountain Run 7:10:29 h17
22.05 100km JPN22nd Yatsugatake Nobeyama 100 km 10:25:03 h96
24.04 118km JPN26th Fuji 5 Lakes 118 km Challenge 11:51:54 h76
05.03 204km JPN6th Little Edo Oedo 200k 26:49:03 h14
2015
08.11 50km JPN7th Kanna Mountain Run 8:56:48 h71
31.10 71.5km JPN23rd Hasetsune Cup - Japan Mountain Endurance Race 11:40:50 h319
20.09 153km JPN18th Karisakatoge beyond Chichibu Run 20:43:53 h21
22.06 77km JPN22. Ultramarathon Okumusashi 7:06:36 h81
17.05 100km JPN21st Yatsugatake Nobeyama 100 km 10:56:55 h193
28.02 203km JPN5th Little Edo Oedo 200k 29:34:44 h52
2014
20.09 120km JPN1st SkyView Ultra-Trail - Yamada Noboru Memorial Cup 27:25:53 h204
27.07 77km JPN21. Ultramarathon Okumusashi 8:20:06 h122
18.05 100km JPN20th Yatsugatake Nobeyama 100 km 10:35:07 h99
2013
13.10 71.5km JPN21st Hasetsune Cup - Japan Mountain Endurance Race 11:36:15 h236
28.07 77km JPN20. Ultramarathon Okumusashi 7:46:39 h147
19.05 100km JPN19th Yatsugatake Nobeyama 100 km 11:10:10 h162
21.04 100km JPN23rd Fuji 5 Lakes 100 km Challenge 10:55:03 h92
02.03 91km JPN3rd Little Edo 91km 9:54:30 h4
2012
07.10 71.5km JPN20th Hasetsune Cup - Japan Mountain Endurance Race 12:55:37 h398
20.05 100km JPN18th Yatsugatake Nobeyama 100 km 11:52:06 h249
2011
09.10 71.5km JPN19th Hasetsune Cup - Japan Mountain Endurance Race 16:52:23 h860