Hajime (赤塚元) Akatsuka
Born : 1969 Cat. M55 Ultrarunner since 2011 JPN
27
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
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
41,9%
Rank quotient ?This runner's calculation uses 27 eligible race(s): Σ(rank − 1) = 11 567; Σ finishers = 27 633. 11 567 / 27 633 × 100 = 41.86%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed27
Km — ultra races2 718 km
> 100 km2
Longest race140,0 km

Km per year (ultra races)

300
3 races
2022
318
3 races
2023
100
1 race
2024
100
1 race
2025
2026

Race types (share of distance)

Road96,3%
Trail3,7%

Records

HISTORY

27 race(s)
DateRacePerf.Rk
2025
08.06 100km JPN13th Hida Takayama 100 km Ultramarathon 13:12:14 h1004
2024
22.09 100km JPN32. Akita Nairiku 100km Marathon 12:41:11 h233
2023
24.09 100km JPN31. Akita Nairiku 100km Marathon 12:57:29 h480
11.06 100km JPN11th Hida Takayama 100 km Ultramarathon 13:44:35 h1123
16.04 118km JPN33th Fuji 5 Lakes 118 km Challenge 14:23:20 h251
2022
25.09 100km JPN30. Akita Nairiku 100km Marathon 11:23:53 h102
18.09 100km JPN20th Tango 100 km Ultramarathon 13:22:36 h392
12.06 100km JPN10th Hida Takayama 100 km Ultramarathon 12:48:35 h616
2019
09.06 100km JPN8th Hida Takayama 100 km Ultramarathon 11:07:05 h360
21.04 100km JPN29th Fuji 5 Lakes 100 km Challenge 11:36:49 h402
2018
16.09 100km JPN18th Tango 100 km Ultramarathon 13:46:20 h924
17.06 100km JPN2nd Nikko 100km Ultramarathon 12:13:51 h346
2017
02.07 100km JPN1st Nikko 100km Ultramarathon 13:36:03 h849
11.06 100km JPN13th Iwate Ginga 100km Marathon Challenge 12:40:44 h624
03.05 140km JPN29. Yamaguchi 100 Hagi-O-Kan Maranic 140 km 21:22:55 h73
2016
18.09 100km JPN16th Tango 100 km Ultramarathon 10:38:47 h157
12.06 100km JPN12th Iwate Ginga 100km Marathon Challenge 11:08:42 h196
2015
20.09 100km JPN15th Tango 100 km Ultramarathon 13:18:16 h1038
07.06 100km JPN4th Hida Takayama 100 km Ultramarathon 12:37:25 h553
2014
14.09 100km JPN14th Tango 100 km Ultramarathon 12:24:34 h539
08.06 100km JPN3rd Hida Takayama 100 km Ultramarathon 11:24:41 h240
2013
20.10 100km JPN19th River Shimanto 100km 9:47:47 h108
15.09 100km JPN13th Tango 100 km Ultramarathon 9:41:09 h74
09.06 100km JPN2nd Hida Takayama 100 km Ultramarathon 12:27:51 h367
2012
21.09 100km JPN12th Tango 100 km Ultramarathon 12:23:17 h275
20.05 100km JPN18th Yatsugatake Nobeyama 100 km 10:37:37 h87
2011
18.09 60km JPN11th Tango 60 km Ultramarathon 7:45:27 h181