Hideki (今井英樹) Imai
Born : 1970 Cat. M55 Ultrarunner since 2016 JPN
29
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
39
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
31,6%
Rank quotient ?This runner's calculation uses 29 eligible race(s): Σ(rank − 1) = 9 315; Σ finishers = 29 511. 9 315 / 29 511 × 100 = 31.56%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed29
Km — ultra races2 197 km
Longest race100,0 km

Km per year (ultra races)

379
5 races
2022
348
4 races
2023
322
4 races
2024
452
6 races
2025
206
3 races
2026

Race types (share of distance)

Road58,4%
Trail41,6%

HISTORY

29 race(s)
DateRacePerf.Rk
2026
28.06 100km JPN41. Lake Saroma 100 km Ultramarathon 10:42:25 h790
10.05 51km JPN7th FunTrails Round Minano 11:19:19 h488
09.05 55km JPN6th Kimitsu Ultra Marathon 5:21:45 h35
2025
14.12 70km JPN12th Izu Trail Journey 11:35:12 h400
12.10 71.5km JPN33th Hasetsune Cup - Japan Mountain Endurance Race 15:35:11 h377
29.06 100km JPN40. Lake Saroma 100 km Ultramarathon 10:49:41 h545
14.06 48km JPN4th KTF Trail running race - Rockin Bear 8:17:17 h409
20.04 62km JPN35th Fuji 3 Lakes 62 km Challenge 6:08:34 h40
09.03 100km JPN7th Ibaraki 100k Ultra Marathon 9:52:42 h67
2024
16.11 50km JPN10th FunTrails50K Round 11:50:18 h499
13.10 71.5km JPN32th Hasetsune Cup - Japan Mountain Endurance Race 15:01:52 h514
30.06 100km JPN39. Lake Saroma 100 km Ultramarathon 10:51:57 h521
21.04 100km JPN34th Fuji 4 Lakes 100 km Challenge 10:10:00 h145
2023
10.12 70km JPN10th Izu Trail Journey 9:57:50 h277
25.06 100km JPN38. Lake Saroma 100 km Ultramarathon 10:17:38 h376
04.06 78km JPN30. Ultramarathon Okumusashi 8:39:35 h161
12.03 100km JPN5th Ibaraki 100k Ultra Marathon 9:45:04 h36
2022
11.12 70km JPN9th Izu Trail Journey 10:16:53 h351
03.07 8h JPN28th 8-Hour Endurance Race Tokorozawa 73.500 km30
05.06 78km JPN29. Ultramarathon Okumusashi 7:54:28 h127
07.05 57km JPN2nd Kimitsu Ultra Marathon 5:23:17 h18
17.04 100km JPN32th Fuji 5 Lakes 100 km Challenge 11:08:45 h261
2021
04.07 8h JPN27th 8-Hour Endurance Race Tokorozawa 78.400 km59
2020
13.12 66km JPN7th Izu Trail Journey 10:09:53 h417
2019
08.12 71.7km JPN6th Izu Trail Journey 10:40:34 h584
2018
09.12 71.7km JPN5th Izu Trail Journey 11:29:03 h478
2017
10.12 71.7km JPN4th Izu Trail Journey 12:32:49 h688
2016
11.12 71.7km JPN3rd Izu Trail Journey 12:19:05 h622
25.09 60km JPN8th Hokkaido Outdoor Festival 60 km Run 11:58:56 h29