Susumu (白井進) Shirai
ID 103520
Born : 1951 Cat. M75 Ultrarunner since 2000 JPN
40
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
57,3%
Rank quotient ?This runner's calculation uses 40 eligible race(s): Σ(rank − 1) = 5 349; Σ finishers = 9 334. 5 349 / 9 334 × 100 = 57.31%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed41
Km — ultra races4 108 km
> 100 km5
> 160 km3
> 200 km1
Longest race250,0 km
22. Yamaguchi 100 Hagi-O-Kan Maranic 250 km — 2/5/2010

Km per year (ultra races)

45
1 race
2022
88
1 race
2023
64
1 race
2024
64
1 race
2025
2026

Race types (share of distance)

Road89,5%
Trail7,3%
Stage3,2%

Records

100 km11h07'246 h59,00 km

HISTORY

40 race(s)
DateRacePerf.Rk
2025
28.09 64km JPN28th Muraoka 64 km Ultra Marathon 8:50:43 h444
2024
29.09 64km JPN27th Muraoka 64 km Ultra Marathon 10:06:00 h217
2023
24.09 88km JPN26th Muraoka 88 km Ultra Marathon 13:39:28 h141
2022
29.09 45km JPN25th Muraoka 45 km Ultra Marathon 7:40:45 h881
2019
29.09 88km JPN22th Muraoka 88 km Ultra Marathon 13:11:25 h122
12.05 100km JPN26th Ebisu-Daikoku 100 km Marathon 12:56:22 h244
2018
27.05 100km JPN25th Ebisu-Daikoku 100 km Marathon 13:11:10 h198
2017
24.09 88km JPN20th Muraoka 88 km Ultra Marathon 12:29:53 h117
28.05 100km JPN24th Ebisu-Daikoku 100 km Marathon 13:20:30 h258
2016
25.09 88km JPN19th Muraoka 88 km Ultra Marathon 12:51:57 h101
2015
27.09 88km JPN18th Muraoka 88 km Ultra Marathon 12:30:20 h101
31.05 100km JPN22nd Ebisu-Daikoku 100 km Marathon 12:48:23 h250
2014
25.05 100km JPN21st Ebisu-Daikoku 100 km Marathon 12:37:59 h155
2013
29.09 88km JPN16th Muraoka 88 km Ultra Marathon 12:04:51 h60
2012
27.05 100km JPN19th Ebisu-Daikoku 100 km Marathon 11:44:15 h102
2011
29.05 100km JPN18th Ebisu-Daikoku 100 km Marathon 12:07:56 h152
2010
30.05 100km JPN17th Ebisu-Daikoku 100 km Marathon 11:07:24 h78
02.05 250km JPN22. Yamaguchi 100 Hagi-O-Kan Maranic 250 km 42:51:45 h46
16.04 190km JPN10th Taiyou No Michi 190km 39:49:00 h11
2009
31.05 100km JPN16th Ebisu-Daikoku 100 km Marathon 12:10:42 h133
10.04 190km JPN9th Taiyou No Michi 190km 39:06:00 h16
2008
14.06 90km JPN6th Osaka Bay 90km 13:54:00 h4
25.05 100km JPN15th Ebisu-Daikoku 100 km Marathon 11:31:14 h66
03.05 140km JPN20. Yamaguchi 100 Hagi-O-Kan Maranic 140 km 20:31:24 h44
26.01 6h JPN15th Challenge Marathon in Nagai - 6 hours run 59.000 km4
2007
27.05 100km JPN14th Ebisu-Daikoku 100 km Marathon 11:51:59 h53
21.01 6h JPN14th Challenge Marathon in Nagai - 6 hours run 56.200 km6
2006
28.05 100km JPN13th Ebisu-Daikoku 100 km Marathon 11:11:51 h32
2005
29.05 100km JPN12th Ebisu-Daikoku 100 km Marathon 12:06:41 h59
2004
24.09 100km JPN7th Muraoka 100 km Ultra Marathon 12:33:49 h55
30.05 100km JPN11th Ebisu-Daikoku 100 km Marathon 11:12:56 h40
16.05 100km JPN10th Yatsugatake Nobeyama 100 km 12:44:04 h243
2003
23.09 100km JPN6th Muraoka 100 km Ultra Marathon 13:15:22 h95
26.07 132km/2stages JPNYashagaike Legend Maranic 132 km 18:01:50 h114
25.05 100km JPN10th Ebisu-Daikoku 100 km Marathon 11:48:10 h43
11.05 100km JPN9th Yatsugatake Nobeyama 100 km 13:03:09 h320
2002
26.05 100km JPN9th Ebisu-Daikoku 100 km Marathon 12:58:45 h70
12.05 100km JPN8th Yatsugatake Nobeyama 100 km 12:41:40 h258
2001
27.05 100km JPN8th Ebisu-Daikoku 100 km Marathon 12:14:09 h25
2000
28.05 100km JPN7th Ebisu-Daikoku 100 km Marathon 12:03:05 h31