Masakazu (石原正一) Ishihara
ID 631739
Born : 1967 Cat. M55 Ultrarunner since 2013 JPN
18
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
36
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
47,1%
Rank quotient ?This runner's calculation uses 18 eligible race(s): Σ(rank − 1) = 3 794; Σ finishers = 8 047. 3 794 / 8 047 × 100 = 47.15%. A win adds 0 to the numerator. Lower is better.