Hiroyuki (榊原裕之) Sakakihara
Born : 1963 Cat. M60 Ultrarunner since 2014 JPN
24
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
40
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
28,1%
Rank quotient ?This runner's calculation uses 24 eligible race(s): Σ(rank − 1) = 6 269; Σ finishers = 22 297. 6 269 / 22 297 × 100 = 28.12%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed24
Km — ultra races2 132 km
> 100 km1
Longest race118,0 km

Km per year (ultra races)

171
2 races
2022
171
2 races
2023
331
4 races
2024
331
4 races
2025
100
1 race
2026

Race types (share of distance)

Road100,0%

HISTORY

24 race(s)
DateRacePerf.Rk
2026
14.06 100km JPN14th Hida Takayama 100 km Ultramarathon 13:12:41 h966
2025
14.09 60km JPN23th Tango 60 km Ultramarathon 6:50:06 h100
29.06 100km JPN40. Lake Saroma 100 km Ultramarathon 12:08:31 h1059
08.06 71km JPN13th Hida Takayama 71 km Ultramarathon 8:00:58 h125
13.04 100km JPN4th Atsumi Peninsula Ultra Nature Run - 100km 13:44:28 h59
2024
15.09 60km JPN22th Tango 60 km Ultramarathon 6:58:17 h81
30.06 100km JPN39. Lake Saroma 100 km Ultramarathon 11:17:54 h654
09.06 71km JPN12th Hida Takayama 71 km Ultramarathon 7:05:12 h47
20.04 100km JPN3rd Atsumi Peninsula Ultra Nature Run - 100km 13:27:01 h50
2023
17.09 100km JPN21th Tango 100 km Ultramarathon 12:55:15 h325
11.06 71km JPN11th Hida Takayama 71 km Ultramarathon 6:58:00 h36
2022
18.09 100km JPN20th Tango 100 km Ultramarathon 11:07:26 h101
12.06 71km JPN10th Hida Takayama 71 km Ultramarathon 6:48:45 h15
2019
19.10 100km JPN4th Iki 100 km Ultra Marathon 10:42:39 h38
15.09 100km JPN19th Tango 100 km Ultramarathon 11:54:51 h263
09.06 100km JPN8th Hida Takayama 100 km Ultramarathon 11:29:46 h483
21.04 118km JPN29th Fuji 5 Lakes 118 km Challenge 14:25:40 h322
2018
20.10 100km JPN3rd Iki 100 km Ultra Marathon 11:04:10 h69
10.06 100km JPN7th Hida Takayama 100 km Ultramarathon 12:03:56 h505
2017
21.10 50km JPN2nd Iki 50 km Ultra Marathon 4:52:44 h21
2016
12.06 100km JPN5th Hida Takayama 100 km Ultramarathon 11:10:42 h250
24.04 100km JPN26th Fuji 5 Lakes 100 km Challenge 10:00:56 h131
2015
07.06 100km JPN4th Hida Takayama 100 km Ultramarathon 12:26:03 h491
2014
22.11 60km JPN1st Kiso-Sansen 60 km Ultra-Marathon 5:35:49 h102