Masahiko (伊藤正彦) Ito
ID 289637
Born : 1956 Cat. M70 Ultrarunner since 2010 JPN
5
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
20
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
74,6%
Rank quotient ?This runner's calculation uses 5 eligible race(s): Σ(rank − 1) = 1 914; Σ finishers = 2 566. 1 914 / 2 566 × 100 = 74.59%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed5
Km — ultra races446 km
Longest race100,0 km
36th Fuji 4 Lakes 100 km Challenge — 19/4/2026

Km per year (ultra races)

100
1 race
2022
2023
2024
2025
100
1 race
2026

Race types (share of distance)

Road55,2%
Trail22,4%
Ult.Walk22,4%

Records

100 km13h39'4650 mi16h59'47

HISTORY

5 race(s)
DateRacePerf.Rk
2026
19.04 100km JPN36th Fuji 4 Lakes 100 km Challenge 13:39:51 h1209
2022
23.04 100km JPN4th Hakone Kodo Ultra Walking 24:41:24 h67
2020
20.09 80km JPN6th Nishi Seto Expressway Ultra Run 16:59:47 h106
2014
28.09 66km JPN17th Muraoka 66 km Ultra Marathon 9:57:32 h215
2010
27.06 100km JPN10th Nichinan Orochi 100 km Marathon 13:39:46 h322