Kazuaki (脇坂和明) Wakisaka
Born : 1973 Cat. M50 Ultrarunner since 2005 JPN
26
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
39
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
40,5%
Rank quotient ?This runner's calculation uses 26 eligible race(s): Σ(rank − 1) = 5 630; Σ finishers = 13 888. 5 630 / 13 888 × 100 = 40.54%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed27
Km — ultra races2 193 km
> 100 km3
Longest race160,0 km

Km per year (ultra races)

2022
78
1 race
2023
152
1 race
2024
132
2 races
2025
260
2 races
2026

Race types (share of distance)

Road48,7%
Trail47,6%
Stage3,7%

HISTORY

27 race(s)
DateRacePerf.Rk
2026
31.05 100km JPN1st Nara Ultra Marathon 13:23:11 h1257
28.03 160km JPN1st Shinkun Iga-goe Route Journey Run 29:31:05 h101
2025
12.10 71.5km JPN33th Hasetsune Cup - Japan Mountain Endurance Race 19:21:01 h771
03.05 12h JPN5th Yarikan 12h 60.900 km47
2024
08.12 70km JPN11th Izu Trail Journey 11:29:44 h620
16.03 82km JPN12th Arakawa Riverside Journey Stage Race - Stage 1 10:19:14 h34
2023
04.06 78km JPN30. Ultramarathon Okumusashi 9:18:43 h275
2021
24.10 82km JPN6th Osorakan-Trail 82 km 13:58:22 h35
2019
27.10 73km JPN10th OSJ Hyonosen Mountains Trail Race 12:28:15 h79
19.05 65km JPN4th Osorakan-Trail 10:40:40 h67
2018
02.12 50km JPN6th Kumano Old Trails 7:27:11 h46
28.10 70km JPN3rd Ryoma Dappan Trail Race 10:03:58 h9
09.09 51.4km JPN8th Hakuba Int. Trail Run 6:41:26 h70
10.06 100km JPN2nd Koyasan and Ryujin-Onsen 100 km Ultra Marathon 11:56:03 h69
27.05 51.9km JPN3rd Rokko 5 Peaks Trail Race 10:06:56 h38
2017
15.10 57.8km JPN1st Kohechi Trail Journey 7:44:01 h5
01.10 74.5km JPN2nd Shinjo-Hiruzen Super Trail 10:10:03 h14
28.05 65km JPN2nd Osorakan-Trail 9:36:06 h20
21.05 100km JPN23rd Yatsugatake Nobeyama 100 km 10:55:22 h117
13.05 50km JPN3rd Mt. Hiei Int. 50 km Trail Run 7:14:45 h30
23.04 118km JPN27th Fuji 5 Lakes 118 km Challenge 12:00:38 h61
25.03 112km JPN16th Mt. Rocco Cannonball Run - 112 km Power 13:38:24 h8
2016
25.09 100km JPN19th Muraoka 100 km Ultra Marathon 13:06:35 h241
28.05 50km JPN2nd Mt. Hiei Int. 50 km Trail Run 9:56:02 h657
2015
27.09 100km JPN18th Muraoka 100 km Ultra Marathon 11:59:29 h120
2010
26.09 100km JPN13th Muraoka 100 km Ultra Marathon 13:45:20 h183
2005
16.10 100km JPN11th River Shimanto 100km 13:07:42 h716