Hideyuki (関秀之) Seki
ID 259444
Born : 1952 Cat. M70 Ultrarunner since 2005 JPN
25
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
47
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
46,5%
Rank quotient ?This runner's calculation uses 25 eligible race(s): Σ(rank − 1) = 8 803; Σ finishers = 18 934. 8 803 / 18 934 × 100 = 46.49%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed25
Km — ultra races2 525 km
> 100 km3
Longest race140,0 km
29. Yamaguchi 100 Hagi-O-Kan Maranic 140 km — 3/5/2017

Km per year (ultra races)

2022
2023
62
1 race
2024
2025
2026

Race types (share of distance)

Road100,0%

Records

100 km11h39'53

HISTORY

25 race(s)
DateRacePerf.Rk
2024
21.04 62km JPN34th Fuji 3 Lakes 62 km Challenge 9:25:35 h814
2019
19.10 100km JPN4th Iki 100 km Ultra Marathon 13:05:35 h179
21.04 71km JPN29th Fuji 5 Lakes 71 km Challenge 8:47:45 h229
2017
11.06 100km JPN13th Iwate Ginga 100km Marathon Challenge 12:12:52 h481
03.05 140km JPN29. Yamaguchi 100 Hagi-O-Kan Maranic 140 km 23:11:33 h201
2016
12.06 100km JPN5th Hida Takayama 100 km Ultramarathon 13:05:49 h809
2015
14.06 100km JPN11th Iwate Ginga 100km Marathon Challenge 12:08:06 h374
2014
19.10 100km JPN20th River Shimanto 100km 11:48:08 h414
28.09 100km JPN17th Muraoka 100 km Ultra Marathon 13:13:15 h288
08.06 100km JPN3rd Hida Takayama 100 km Ultramarathon 12:52:22 h568
03.05 140km JPN26. Yamaguchi 100 Hagi-O-Kan Maranic 140 km 21:34:36 h71
2013
22.09 100km JPN23. Akita Nairiku 100km Marathon 12:10:58 h345
09.06 100km JPN2nd Hida Takayama 100 km Ultramarathon 12:58:08 h504
03.05 140km JPN25. Yamaguchi 100 Hagi-O-Kan Maranic 140 km 21:06:08 h68
2012
21.09 100km JPN12th Tango 100 km Ultramarathon 12:52:12 h368
10.06 100km JPN8th Iwate Ginga 100km Marathon Challenge 11:48:46 h321
2011
25.09 100km JPN14th Muraoka 100 km Ultra Marathon 12:36:50 h108
21.08 100km JPN1st North Okhotsk 100 km Marathon 11:49:23 h87
2010
09.10 100km JPN8th Echigo Kubikino 100km Ultramarathon 11:47:23 h375
2009
27.09 100km JPN19. Akita Nairiku 100km Marathon 12:05:11 h373
26.04 72km JPN19th Fuji 5 Lakes 72 km Challenge 8:44:03 h178
2008
11.10 100km JPN7th Echigo Kubikino 100km Ultramarathon 12:28:04 h408
2007
29.09 100km JPN10th Muraoka 100 km Ultra Marathon 12:51:08 h105
2006
15.10 100km JPN12th River Shimanto 100km 11:40:05 h348
2005
26.06 100km JPNOpen Race at IAU 100km WC Yubetsu (20. Lake Saroma 100 km Ultramarathon) 11:39:53 h812