Hiroshi (稲原博司) Inahara
Born : 1970 Cat. M55 Ultrarunner since 2012 JPN
45
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
55
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
50,7%
Rank quotient ?This runner's calculation uses 45 eligible race(s): Σ(rank − 1) = 9 195; Σ finishers = 18 142. 9 195 / 18 142 × 100 = 50.68%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed45
Km — ultra races4 073 km
> 100 km12
> 160 km6
Longest race170,3 km

Km per year (ultra races)

451
4 races
2022
405
4 races
2023
623
5 races
2024
175
2 races
2025
158
2 races
2026

Race types (share of distance)

Road13,2%
Trail86,8%

HISTORY

45 race(s)
DateRacePerf.Rk
2026
20.06 58km JPN2nd Kaga Spa by UTMB - Kaga Spa Trail Endurance 50 10:16:09 h250
16.05 100km JPN11th Trainic World 100 km in Sai-No-Kuni 27:37:27 h138
2025
21.06 105km JPN1st Kaga Spa by UTMB - Kaga Spa Trail Endurance100 25:32:21 h398
03.05 70km JPN33. Mukogawa Yurikamome Ultra Marathon 7:47:53 h192
2024
16.11 167km JPN3rd Kumagawa Revival Trail 38:48:04 h97
12.10 100mi JPN10th OSJ Koumi 100 33:27:00 h98
14.07 65km JPN15th Nozawa Onsen 4100D Mountain Trail 11:40:05 h121
24.05 160km JPN3rd Tokyo Grand Trail - 100mi 46:36:24 h71
03.05 70km JPN32. Mukogawa Yurikamome Ultra Marathon 8:28:22 h286
2023
06.10 169km JPN3rd Lake Biwa 100 45:56:46 h152
16.07 109.2km JPN15th OSJ Ontake 100km Ultra Trail 15:49:36 h204
04.06 57km JPN5th Nagi Peaks Tough Trail Challenge 12:12:27 h55
03.05 70km JPN31. Mukogawa Yurikamome Ultra Marathon 8:27:10 h264
2022
16.10 57.8km JPN4th Kohechi Trail Journey 9:12:30 h9
17.09 162.6km JPN14th Shinetsu Five Mountains Trail 100 mile 31:45:23 h132
16.07 100mi JPN14th OSJ Ontake 100 Mile Ultra Trail 23:41:26 h48
03.05 70km JPN30. Mukogawa Yurikamome Ultra Marathon 8:02:09 h208
2021
06.11 100km JPN1st OSJ Kami 100 20:52:03 h119
2019
27.10 73km JPN10th OSJ Hyonosen Mountains Trail Race 12:28:08 h78
02.05 70km JPN27. Mukogawa Yurikamome Ultra Marathon 7:54:12 h264
2018
12.05 108.7km JPN2nd Aso Round Trail 22:23:24 h103
03.05 70km JPN26. Mukogawa Yurikamome Ultra Marathon 7:37:45 h301
2017
23.09 129km JPN4th SkyView Ultra-Trail 120 - Yamada Noboru Memorial Cup 28:40:07 h200
28.05 65km JPN2nd Osorakan-Trail 11:31:34 h94
03.05 70km JPN25. Mukogawa Yurikamome Ultra Marathon 8:21:38 h506
2016
11.12 71.7km JPN3rd Izu Trail Journey 10:52:21 h289
30.10 70km JPN2nd OSJ Yamanaka Onsen Trail Run 14:29:32 h95
23.10 56km JPN15th Mt. Rocco Cannonball Run - 56 km Speed 9:57:30 h265
16.07 100km JPN9th OSJ Ontake 100km Ultra Trail 13:38:13 h227
03.05 70km JPN24. Mukogawa Yurikamome Ultra Marathon 8:02:46 h421
26.03 112km JPN14th Mt. Rocco Cannonball Run - 112 km Power 21:01:00 h150
2015
18.10 56km JPN13th Mt. Rocco Cannonball Run - 56 km Speed 12:28:00 h358
25.09 170.3km JPN4th Ultra-Trail Mt. Fuji 42:51:36 h390
29.08 100km JPNKISO Great Traverse 100 km Ultra Marathon 12:25:43 h103
30.05 50km JPN1st Mt. Hiei Int. 50 km Trail Run 9:25:56 h194
03.05 70km JPN23. Mukogawa Yurikamome Ultra Marathon 7:40:32 h267
29.03 56km JPN12th Mt. Rocco Cannonball Run - 56 km Speed 6:45:09 h37
2014
21.09 100km JPN2nd 100 km Ultramarathon Hakusan-Shirakawago 12:26:00 h147
29.06 55.7km JPN1st Kobo Trail 2014 13:04:32 h45
03.05 70km JPN22. Mukogawa Yurikamome Ultra Marathon 7:37:22 h234
30.03 56km JPN10th Mt. Rocco Cannonball Run - 56 km Speed 7:52:49 h78
2013
20.10 71km JPN4th OSJ Hyonosen Mountains Trail Race 13:14:26 h215
15.09 100km JPN13th Tango 100 km Ultramarathon 12:59:36 h764
03.05 70km JPN21. Mukogawa Yurikamome Ultra Marathon 7:29:40 h325
2012
03.05 70km JPN20. Mukogawa Yurikamome Ultra Marathon 7:44:30 h248