Shiyouiti (三浦祥一) Miura
Ultrarunner since 2005 JPN
17
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
44
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
54,4%
Rank quotient ?This runner's calculation uses 17 eligible race(s): Σ(rank − 1) = 1 712; Σ finishers = 3 147. 1 712 / 3 147 × 100 = 54.40%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed21
Km — ultra races2 369 km
> 100 km12
> 160 km2
> 200 km2
Longest race251,0 km

Km per year (ultra races)

751
5 races
2022
628
4 races
2023
290
2 races
2024
149
1 race
2025
72
2026

Race types (share of distance)

Road75,7%
Trail3,0%
Stage21,3%

HISTORY

18 race(s) · 6 stage(s) nested
DateRacePerf.Rk
2026
01.03 71.7km JPN3rd Modern Japanese Silk Road Journey Run - Stage 2 11:57:14 h58
2025
29–30.03 149km/2stages JPN2nd Modern Japanese Silk Road Journey Run 22:11:49 h47
2024
02.11 142km JPN6th Autumn leaves in Okumusashi / Chichibu Journey run 22:53:29 h63
30–31.03 148km/2stages JPN1st Modern Japanese Silk Road Journey Run 22:51:11 h32
2023
28.10 147km JPN5th Autumn leaves in Okumusashi / Chichibu Journey run 22:56:06 h69
17.06 159km JPN4th Nikko Sennin Concentric Highway Journey Run 29:48:26 h36
03.05 251km JPN18th River Road Foot Race 251 km 2d 07:41:41 h48
08.04 71km JPN18th Toda Saiko 70 km 7:17:59 h69
2022
29.10 146km JPN4th Autumn leaves in Okumusashi / Chichibu Journey run 22:39:33 h61
17.09 251km JPN5th Utsukushima Fukushima Journey Run 251K 2d 00:44:40 h36
03.07 8h JPN28th 8-Hour Endurance Race Tokorozawa 58.800 km101
18.06 159km JPN3rd Nikko Sennin Concentric Highway Journey Run 28:57:00 h45
21–22.03 136km/2stages JPN10th Arakawa Riverside Journey Stage Race 18:35:00 h40
2021
30.10 146km JPN3rd Autumn leaves in Okumusashi / Chichibu Journey run 24:41:56 h198
03.04 80km JPN9th Arakawa Riverside Journey - 80 km 10:11:00 h9
2020
19.09 123km JPN3rd Utsukushima Fukushima Journey Run 123K 19:34:08 h82
05.07 8h JPN26th 8-Hour Endurance Race Tokorozawa 58.800 km155
2005
09.10 71.5km JPN13th Hasetsune Cup - Japan Mountain Endurance Race 19:17:34 h638