Keisuke (白水啓介) Shirouzu
ID 221809
Born : 1968 Cat. M55 Ultrarunner since 2011 JPN
32
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
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
63,3%
Rank quotient ?This runner's calculation uses 32 eligible race(s): Σ(rank − 1) = 12 711; Σ finishers = 20 091. 12 711 / 20 091 × 100 = 63.27%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed33
Km — ultra races3 308 km
> 100 km13
> 24h1
Longest race142,0 km
7th Autumn leaves in Okumusashi / Chichibu Journey run — 15/11/2025

Km per year (ultra races)

78
1 race
2022
130
1 race
2023
368
3 races
2024
264
2 races
2025
2026

Race types (share of distance)

Road91,7%
Trail5,9%
Stage2,4%

Records

100 km12h23'3524 h126,30 km

HISTORY

33 race(s)
DateRacePerf.Rk
2025
15.11 142km JPN7th Autumn leaves in Okumusashi / Chichibu Journey run 25:46:49 h147
14.09 122km JPN8th Utsukushima Fukushima Journey Run 122K 23:08:03 h54
2024
16.11 130km JPN2nd Mito Kaido Journey run 22:30:53 h66
20.10 70km JPN31. Ultramarathon Okumusashi 8:41:38 h273
30.03 78km JPN1st Modern Japanese Silk Road Journey Run - Stage 1 11:33:11 h61
09.03 90km JPN14th Little Edo 90k 12:27:16 h41
2023
18.11 130km JPN1st Mito Kaido Journey run 22:45:13 h90
2022
05.06 78km JPN29. Ultramarathon Okumusashi 9:37:22 h463
2021
14.11 63km JPN0. Minuma Challenge 60 8:08:35 h51
2020
19.09 123km JPN3rd Utsukushima Fukushima Journey Run 123K 18:43:57 h68
22.02 115km JPN10th Oedo Night run 115k 17:54:08 h72
2019
17.08 101km JPN7th World Cultural Heritage "Fuji" Foot Race 15:39:54 h109
09.06 100km JPN8th Hida Takayama 100 km Ultramarathon 13:59:33 h1883
24.03 100km JPN1st Ibaraki 100k Ultra Marathon 12:56:20 h366
2018
15.09 24h JPN21. Hiratsuka 24 hour race 126.300 km52
22.04 118km JPN28th Fuji 5 Lakes 118 km Challenge 14:50:20 h431
2017
02.07 100km JPN1st Nikko 100km Ultramarathon 12:58:45 h591
23.04 118km JPN27th Fuji 5 Lakes 118 km Challenge 14:51:29 h570
2016
09.10 100km JPN11th Echigo Kubikino 100km Ultramarathon 13:16:27 h1129
11.09 100km JPN4th 100 km Ultramarathon Hakusan-Shirakawago 13:33:17 h336
28.08 48km JPN3rd Tsukuba Renjyo 48 km Road & Trail Run 6:43:24 h108
12.06 100km JPN12th Iwate Ginga 100km Marathon Challenge 12:46:23 h515
24.04 118km JPN26th Fuji 5 Lakes 118 km Challenge 13:59:54 h323
2015
18.10 100km JPN21st River Shimanto 100km 13:14:50 h816
20.09 100km JPN15th Tango 100 km Ultramarathon 13:03:37 h921
30.08 48km JPN2nd Tsukuba Renjyo 48 km Road & Trail Run 6:16:58 h88
14.06 100km JPN11th Iwate Ginga 100km Marathon Challenge 12:41:56 h500
19.04 118km JPN25th Fuji 5 Lakes 118 km Challenge 14:20:46 h372
2014
08.06 100km JPN10th Iwate Ginga 100km Marathon Challenge 12:23:35 h457
18.05 100km JPN20th Yatsugatake Nobeyama 100 km 13:22:40 h747
2013
01.06 60km JPN1st Tokyo Shibamata 60 km 6:06:24 h91
21.04 112km JPN23rd Fuji 5 Lakes 112 km Challenge 14:08:11 h188
2011
30.04 100km JPN21st Fuji 5 Lakes 100 km Challenge 13:53:30 h825