Seiichi (武藤誠一) Muto
Born : 1969 Cat. M55 Ultrarunner since 2015 JPN
21
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
46
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 ?JPNJapanMARMorocco
67,3%
Rank quotient ?This runner's calculation uses 21 eligible race(s): Σ(rank − 1) = 2 630; Σ finishers = 3 905. 2 630 / 3 905 × 100 = 67.35%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed28
Km — ultra races2 524 km
> 100 km10
> 160 km2
> 200 km2
> 24h7
> 48h1
Longest race270,0 km

Km per year (ultra races)

211
2 races
2022
421
4 races
2023
234
2 races
2024
464
3 races
2025
538
3 races
2026

Race types (share of distance)

Road78,2%
Stage21,8%

HISTORY

21 race(s) · 4 stage(s) nested · 1 split(s) nested
DateRacePerf.Rk
2026
23.05 24h JPNIAU 24h Asia and Oceania Championships Open 117.500 km93
05.04 270km/6stages MAR40. Marathon des Sables Legendary 2d 07:16:26 h796
28.02–01.03 150km/2stages JPN3rd Modern Japanese Silk Road Journey Run 22:18:03 h48
2025
01–02.11 130km/2stages JPN3rd Mito Kaido Journey run 19:23:47 h37
20.09 24h JPN25th 24-hour relay & solo marathon Kobe 120.450 km32
23.05 48h JPN4th Hirosaki 48h Ultra Run 213.058 km18
2024
29.09 100km JPN11th Naeba-Sanroku Geopark Tsunan Ultramarathon 100K 15:25:21 h39
17.08 24h JPN24th 24-hour relay & solo marathon Kobe 134.300 km42
2023
01.10 100km JPN10th Naeba-Sanroku Geopark Tsunan Ultramarathon 100K 15:01:51 h44
19.08 24h JPN23th 24-hour relay & solo marathon Kobe 120.700 km53
14.05 100km JPN27th 100 km Ultramarathon Ako Seaside Park 13:32:15 h30
23.04 100km JPN14th 100 km Ultra Maranic Osaka 13:46:58 h225
2022
02.10 100km JPN9th Naeba-Sanroku Geopark Tsunan Ultramarathon 100K 14:48:07 h32
30.07 24h JPN22th 24-hour relay & solo marathon Kobe 110.500 km59
2019
20.10 100km JPN8th Noto Peninsula 100 km Ultra Marathon 13:54:34 h261
14.09 24h JPN14. Shonan Int. Relay Marathon 24 Hour Run 131.500 km44
2018
21.10 100km JPN7th Noto Peninsula 100 km Ultra Marathon 13:44:50 h245
17.03 6h JPN8th Iikoto Challenge - 6h 55.760 km24
2017
15.10 100km JPN6th Noto Peninsula 100 km Ultra Marathon 13:55:23 h361
2016
16.10 100km JPN5th Noto Peninsula 100 km Ultra Marathon 12:57:41 h137
2015
04.10 70km JPN2nd Naeba-Sanroku Geopark Tsunan Ultramarathon 70K 9:11:31 h31