Masahiro (岡村正博) Okamura
ID 965030
Born : 1980 Cat. M45 Ultrarunner since 2017 JPN
13
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
25
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
2,3%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 26; Σ finishers = 1 143. 26 / 1 143 × 100 = 2.27%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed13
Km — ultra races759 km
Longest race75,0 km
8th Minamiboso 75km — 16/3/2024

Km per year (ultra races)

60
1 race
2022
66
1 race
2023
133
2 races
2024
113
2 races
2025
2026

Race types (share of distance)

Road85,1%
Trail14,9%

Wins & podiums (ultra)

🏆 Win5
🏆 Win M5
🏅 Top 310
🏅 Top 3 M10
Longest winning streak2
Current streak1

Records

50 km4h17'006 h58,28 km

HISTORY

13 race(s)
DateRacePerf.Rk
2025
26.10 63.3km JPN4th Shiroishi Minami Zao Ultra Excursion 63.3km 8:48:37 h1 🏆
30.08 50km JPN2nd Sendai Ultra 50km Noon Run 7:10:39 h12
2024
13.10 6h JPN2nd Aizu Yanaizu Akabeko Marathon - 6h 58.275 km1 🏆
16.03 75km JPN8th Minamiboso 75km 7:38:44 h2 🥈
2023
11.11 66km JPN10th Michikusa-Ultra, Minamiizu 66 km 6:48:09 h1 🏆
2022
26.03 60km JPN3rd Tokyo Katsushika Ultra Marathon - 60km 5:07:41 h4
2021
14.11 63km JPN0. Minuma Challenge 60 6:17:08 h8
2019
26.07 67.4km JPN1st Ultra Night Run Kamakura - Atami 67 7:03:42 h2 🥈
25.05 52km JPN8th Tojinbo 52 km Ultramarathon 4:53:53 h2 🥈
2018
30.09 50km JPN21th Jonaizaka 50 km Ultra Marathon 4:23:00 h1 🏆
26.05 52km JPN7th Tojinbo 52 km Ultramarathon 4:46:59 h1 🏆
2017
24.09 50km JPN20th Jonaizaka 50 km Ultra Marathon 4:17:00 h2 🥈
27.05 52km JPN6th Tojinbo 52 km Ultramarathon 4:25:46 h2 🥈