Jun (荒川純) Arakawa
ID 286690
Born : 1983 Cat. M40 Ultrarunner since 2012 JPN
54
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
70
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
2
Countries visited ?FRAFranceJPNJapan
9,2%
Rank quotient ?This runner's calculation uses 60 eligible race(s): Σ(rank − 1) = 2 682; Σ finishers = 29 205. 2 682 / 29 205 × 100 = 9.18%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed60
Km — ultra races7 056 km
> 100 km38
> 160 km23
Longest race200,0 km
5th Kyoto Great Round 200 km — 28/12/2024

Km per year (ultra races)

1 312
10 races
2022
890
6 races
2023
1 122
7 races
2024
739
7 races
2025
366
3 races
2026

Race types (share of distance)

Road16,6%
Trail83,4%

Wins & podiums (ultra)

🏆 Win6
🏆 Win M6
🏅 Top 313
🏅 Top 3 M13
Longest winning streak2
Current streak0

Records

50 km6h42'24100 km9h44'1050 mi10h59'47100 mi17h36'02

HISTORY

60 race(s)
DateRacePerf.Rk
2026
20.06 105km JPN2nd Kaga Spa by UTMB - Kaga Spa Trail Endurance100 13:31:43 h6
16.05 100mi JPN11th Trainic World 100 Mile in Sai-No-Kuni 28:17:39 h2 🥈
11.04 100km JPN1st Hiroshima Trail 16:50:13 h6
2025
29.12 70km JPN6th Kyoto Great Round 70 km 13:10:42 h9
28.12 80km JPN6th Kyoto Great Round 80 km 10:59:47 h1 🏆
19.10 54km JPN11th Shigakogen Extreme Trail - Skyultra 7:01:46 h14
05.10 51.4km JPN13th Trainic world Ogose-Tokigawa Trail Run 50km 5:46:44 h1 🏆
13.09 162.2km JPN17th Shinetsu Five Mountains Trail 100 mile 20:57:27 h4
17.05 100mi JPN10th Trainic World 100 Mile in Sai-No-Kuni 27:59:53 h4
12.04 160km JPN1st Tokai Peninsura Giant Trail 100 28:03:21 h5
2024
28.12 200km JPN5th Kyoto Great Round 200 km 43:07:03 h2 🥈
14.09 163.1km JPN16th Shinetsu Five Mountains Trail 100 mile 24:07:17 h19
13.07 100mi JPN16th OSJ Ontake 100 Mile Ultra Trail 17:36:02 h1 🏆
07.06 170km JPN3rd Tamba 100 Adventure Trail - 100mi 40:50:30 h2 🥈
18.05 100mi JPN9th Trainic World 100 Mile in Sai-No-Kuni 27:00:37 h2 🥈
26.04 167km JPN9th Ultra-Trail Mt. Fuji 23:49:00 h18
17.02 100km JPN2nd Daimonji 100 15:31:06 h1 🏆
2023
29.12 100Miles JPN4th Kyoto Great Round 100 miles 24:51:13 h1 🏆
10.12 70km JPN10th Izu Trail Journey 7:34:00 h25
15.07 100mi JPN15th OSJ Ontake 100 Mile Ultra Trail 17:48:59 h2 🥈
02.06 170km JPN2nd Tamba 100 Adventure Trail - 100mi 32:10:57 h4
20.05 100mi JPN8th Trainic World 100 Mile in Sai-No-Kuni 25:31:07 h3 🥉
21.04 167km JPN8th Ultra-Trail Mt. Fuji 22:17:14 h10
2022
29.12 100Miles JPN3rd Kyoto Great Round 100 miles 26:30:23 h2 🥈
11.12 70km JPN9th Izu Trail Journey 7:15:35 h24
06.11 101.9km JPN6th Koshu Alps Klesa 108 15:08:40 h12
24.09 107km JPN1st Hiroshima Wangan Trail Run 17:21:06 h15
26.08 170km FRA19ème Ultra Trail Tour du Mont Blanc 29:10:24 h134
16.07 106.5km JPN14th OSJ Ontake 100km Ultra Trail 9:57:41 h4
11.06 100.8km JPN2nd Okushinano 100 11:55:13 h12
21.05 100mi JPN7th Trainic World 100 Mile in Sai-No-Kuni 27:02:36 h4
22.04 167km JPN7th Ultra-Trail Mt. Fuji 21:07:16 h13
05.03 167km JPN1st Kumagawa Revival Trail 26:29:25 h4
2021
12.12 69.1km JPN8th Izu Trail Journey 7:21:49 h24
26.11 100mi JPN1st TAMBA 100 Adventure Trail - 100mi 41:46:40 h4
09.10 168.5km JPN7th OSJ Koumi 100 23:55:17 h6
25.09 54km JPN8th Shigakogen Extreme Trail - Skyultra 6:31:32 h6
23.07 65km JPN12th Nozawa Onsen 4100D Mountain Trail Trio 9:30:59 h1 🏆
2020
13.12 66km JPN7th Izu Trail Journey 7:08:05 h27
10.10 100mi JPN6th OSJ Koumi 100 28:27:10 h11
06.09 50km JPN13th OSJ Adatara Trail 50K 6:42:24 h15
2019
08.12 71.7km JPN6th Izu Trail Journey 7:33:03 h44
19.10 51.4km JPN10th Inagawa 100km Ultra-Marathon 6:55:44 h306
14.09 100mi JPN11th Shinetsu Five Mountains Trail 100 mile 24:47:01 h30
11.05 121km JPN3rd Aso Round Trail 21:44:09 h27
21.04 118km JPN29th Fuji 5 Lakes 118 km Challenge 11:37:36 h38
2018
20.10 100km JPN9th Inagawa 100km Ultra-Marathon 15:53:17 h213
22.04 118km JPN28th Fuji 5 Lakes 118 km Challenge 12:04:41 h51
2017
10.12 71.7km JPN4th Izu Trail Journey 12:16:25 h611
08.10 71.5km JPN25th Hasetsune Cup - Japan Mountain Endurance Race 13:30:59 h320
23.07 67.5km JPN5th Kirishima Ebino-kougen Extreme Trail 10:31:00 h82
23.04 118km JPN27th Fuji 5 Lakes 118 km Challenge 11:55:43 h56
2016
04.12 50km JPN4th Kumano Old Trails 8:08:35 h81
12.06 45.4km JPN9th Skyline Trail Sugadaira 6:06:05 h51
24.04 118km JPN26th Fuji 5 Lakes 118 km Challenge 11:25:05 h47
2015
19.04 118km JPN25th Fuji 5 Lakes 118 km Challenge 11:59:59 h51
2014
20.04 108km JPN24th Fuji 5 Lakes 108 km Challenge 10:08:52 h24
2013
01.06 100km JPN1st Tokyo Shibamata 100 km 9:44:10 h74
21.04 112km JPN23rd Fuji 5 Lakes 112 km Challenge 12:13:57 h34
2012
22.04 112km JPN22nd Fuji 5 Lakes 112 km Challenge 12:27:40 h142