Masahiro (山本昌弘) Yamamoto
ID 877692
Ultrarunner since 2016 JPN
10
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
26
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
44,8%
Rank quotient ?This runner's calculation uses 10 eligible race(s): Σ(rank − 1) = 4 318; Σ finishers = 9 638. 4 318 / 9 638 × 100 = 44.80%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed10
Km — ultra races864 km
Longest race100,0 km
32th Yatsugatake Nobeyama 100 km — 17/5/2026

Km per year (ultra races)

152
2 races
2022
200
2 races
2023
100
1 race
2024
100
1 race
2025
100
1 race
2026

Race types (share of distance)

Road100,0%

Records

100 km11h32'50

HISTORY

10 race(s)
DateRacePerf.Rk
2026
17.05 100km JPN32th Yatsugatake Nobeyama 100 km 13:48:01 h1088
2025
18.05 100km JPN31th Yatsugatake Nobeyama 100 km 13:20:33 h685
2024
09.06 100km JPN12th Hida Takayama 100 km Ultramarathon 11:32:50 h379
2023
11.06 100km JPN11th Hida Takayama 100 km Ultramarathon 12:24:43 h547
21.05 100km JPN29th Yatsugatake Nobeyama 100 km 12:37:07 h250
2022
12.06 100km JPN10th Hida Takayama 100 km Ultramarathon 11:58:43 h376
28.05 52km JPN10th Tojinbo 52 km Ultramarathon 5:50:00 h8
2019
25.05 52km JPN8th Tojinbo 52 km Ultramarathon 6:04:57 h11
2017
15.10 60km JPN23rd River Shimanto 60km 7:25:37 h188
2016
16.10 100km JPN22nd River Shimanto 100km 13:01:37 h796