Koutaro (荒木康太郎) Araki
ID 110653
Born : 1970 Cat. M55 Ultrarunner since 2008 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
16,8%
Rank quotient ?This runner's calculation uses 32 eligible race(s): Σ(rank − 1) = 4 181; Σ finishers = 24 960. 4 181 / 24 960 × 100 = 16.75%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed32
Km — ultra races3 071 km
> 100 km1
Longest race112,0 km
21st Fuji 5 Lakes 112 km Challenge — 30/4/2011

Km per year (ultra races)

200
2 races
2022
2023
2024
2025
2026

Race types (share of distance)

Road84,7%
Trail15,3%

Records

100 km10h11'59

HISTORY

32 race(s)
DateRacePerf.Rk
2022
12.06 100km JPN16th Iwate Ginga 100km Marathon Challenge 10:49:34 h162
17.04 100km JPN32th Fuji 5 Lakes 100 km Challenge 10:35:34 h185
2019
20.10 100km JPN8th Noto Peninsula 100 km Ultra Marathon 11:17:09 h54
29.09 100km JPN22th Muraoka 100 km Ultra Marathon 11:07:59 h64
02.06 100km JPN2nd Nanto 100 km Ultramarathon 12:31:35 h98
21.04 100km JPN29th Fuji 5 Lakes 100 km Challenge 10:24:11 h198
2018
17.06 100km JPN2nd Nikko 100km Ultramarathon 10:53:16 h142
20.05 100km JPN24th Yatsugatake Nobeyama 100 km 11:11:36 h221
22.04 100km JPN28th Fuji 5 Lakes 100 km Challenge 10:45:55 h196
2017
02.07 100km JPN1st Nikko 100km Ultramarathon 11:30:58 h222
04.06 100km JPN5th Tokyo Shibamata 100 km 11:20:15 h445
23.04 100km JPN27th Fuji 5 Lakes 100 km Challenge 10:17:28 h192
2016
05.06 100km JPN4th Tokyo Shibamata 100 km 10:36:39 h195
24.04 100km JPN26th Fuji 5 Lakes 100 km Challenge 10:22:40 h155
2015
18.10 100km JPN4th Noto Peninsula 100 km Ultra Marathon 11:30:51 h73
17.05 100km JPN21st Yatsugatake Nobeyama 100 km 11:15:26 h229
11.04 70km JPN10th Toda Saiko 70 km 6:45:18 h87
2013
20.10 60km JPN2nd Noto Peninsula 60 km Ultra Marathon 6:04:58 h19
01.06 100km JPN1st Tokyo Shibamata 100 km 11:09:50 h271
2012
21.10 100km JPN1st Noto Peninsula 100 km Ultra Marathon 10:53:57 h41
20.05 100km JPN18th Yatsugatake Nobeyama 100 km 10:55:46 h124
22.04 100km JPN22nd Fuji 5 Lakes 100 km Challenge 10:11:59 h124
2011
30.04 112km JPN21st Fuji 5 Lakes 112 km Challenge 11:47:45 h77
09.04 70km JPN6th Toda Saiko 70 km 6:09:20 h20
2010
26.09 100km JPN13th Muraoka 100 km Ultra Marathon 10:52:47 h29
13.06 100km JPN6th Iwate Ginga 100km Marathon Challenge 10:13:08 h62
16.05 100km JPN16th Yatsugatake Nobeyama 100 km 11:12:37 h176
2009
27.09 100km JPN12th Muraoka 100 km Ultra Marathon 11:03:01 h28
17.05 100km JPN15th Yatsugatake Nobeyama 100 km 12:09:35 h214
26.04 100km JPN19th Fuji 5 Lakes 100 km Challenge 10:34:36 h79
2008
28.09 88km JPN11th Muraoka 88 km Ultra Marathon 9:40:23 h13
18.05 71km JPN14th Yatsugatake Nobeyama 71 km 7:35:57 h18