Takashi (石原貴史) Ishihara
ID 221440
Born : 1962 Cat. M60 Ultrarunner since 2011 JPN
26
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
22,3%
Rank quotient ?This runner's calculation uses 26 eligible race(s): Σ(rank − 1) = 3 505; Σ finishers = 15 737. 3 505 / 15 737 × 100 = 22.27%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed26
Km — ultra races2 308 km
> 100 km9
> 160 km2
Longest race160,9 km
11th Shinetsu Five Mountains Trail 100 mile — 14/9/2019

Km per year (ultra races)

2022
2023
2024
2025
2026

Race types (share of distance)

Road25,0%
Trail75,0%

Records

50 km6h04'38100 km10h20'2150 mi11h35'57100 mi30h48'04

HISTORY

26 race(s)
DateRacePerf.Rk
2019
14.09 100mi JPN11th Shinetsu Five Mountains Trail 100 mile 30:48:04 h164
2018
12.05 108.7km JPN2nd Aso Round Trail 22:23:24 h105
2017
16.09 102km JPN9th Shinetsu Five Mountains Trail 100 mile 17:51:33 h164
01.07 80km JPN7th Utsukushigahara 80 km Trail Run 11:35:57 h251
25.03 112km JPN16th Mt. Rocco Cannonball Run - 112 km Power 14:56:29 h19
2016
13.11 75km JPN2nd Gasando Trail running race 10:20:01 h41
02.07 80km JPN6th Utsukushigahara 80 km Trail Run 13:08:27 h155
28.05 50km JPN2nd Mt. Hiei Int. 50 km Trail Run 7:58:26 h159
26.03 112km JPN14th Mt. Rocco Cannonball Run - 112 km Power 15:42:00 h22
2015
22.09 110km JPN7th Shinetsu Five Mountains Trail 110km 16:40:54 h142
04.07 80km JPN5th Utsukushigahara 80 km Trail Run 13:22:00 h179
30.05 50km JPN1st Mt. Hiei Int. 50 km Trail Run 8:30:07 h93
15.03 72km JPN2nd Izu Trail Journey 10:31:22 h227
2014
09.11 50km JPN6th Kanna Mountain Run II 7:27:21 h13
14.09 110km JPN6th Shinetsu Five Mountains Trail 110km 15:50:26 h67
29.06 55.7km JPN1st Kobo Trail 2014 10:47:51 h16
18.05 77km JPNSaba Highway Ultramarathon 8:41:23 h56
2013
13.10 71.5km JPN21st Hasetsune Cup - Japan Mountain Endurance Race 13:14:04 h443
19.05 76km JPNSaba Highway Ultramarathon 8:54:25 h62
26.04 100mi JPN2nd Ultra-Trail Mount Fuji 35:24:07 h232
10.03 72km JPN1st Izu Trail Journey 10:24:16 h260
2012
07.10 50km JPN6th Madarao Forest Trails 50km 6:04:38 h61
16.09 110km JPN4th Shinetsu Five Mountains Trail 110km 17:25:32 h112
19.05 82km JPN1st Shizuoka to Yamanashi 16:32:02 h181
22.04 100km JPN22nd Fuji 5 Lakes 100 km Challenge 10:47:42 h197
2011
30.04 100km JPN21st Fuji 5 Lakes 100 km Challenge 10:20:21 h110