Koji (日下浩二) Kusaka
Born : 1964 Cat. M60 Ultrarunner since 2010 JPN
25
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
47
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
30,8%
Rank quotient ?This runner's calculation uses 25 eligible race(s): Σ(rank − 1) = 2 856; Σ finishers = 9 265. 2 856 / 9 265 × 100 = 30.83%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed25
Km — ultra races2 412 km
> 100 km1
Longest race102,0 km

Km per year (ultra races)

2022
100
1 race
2023
2024
2025
50
1 race
2026

Race types (share of distance)

Road100,0%

HISTORY

25 race(s)
DateRacePerf.Rk
2026
21.06 50km JPN19. Okinoshima 50km Ultra Marathon 7:33:32 h353
2023
28.05 100km JPN29th Ebisu-Daikoku 100 km Marathon 13:35:26 h264
2019
16.06 100km JPN14. Okinoshima 100km Ultra Marathon 12:31:22 h192
12.05 100km JPN26th Ebisu-Daikoku 100 km Marathon 12:43:54 h222
2018
17.06 100km JPN13. Okinoshima 100km Ultra Marathon 11:20:09 h73
27.05 100km JPN25th Ebisu-Daikoku 100 km Marathon 11:16:04 h57
2017
01.10 100km JPN1st Yasaka Ultra Marathon in Hamada - 100 km 12:15:24 h23
18.06 100km JPN12. Okinoshima 100km Ultra Marathon 11:38:26 h98
28.05 100km JPN24th Ebisu-Daikoku 100 km Marathon 11:41:11 h109
15.04 102km JPN3rd Okuizumo Ultra Orochi 100km Tooashi 12:03:10 h74
2016
19.06 100km JPN11. Okinoshima 100km Ultra Marathon 10:54:13 h60
29.05 100km JPN23rd Ebisu-Daikoku 100 km Marathon 10:09:15 h65
2015
21.06 100km JPN10. Okinoshima 100km Ultra Marathon 11:09:25 h88
31.05 100km JPN22nd Ebisu-Daikoku 100 km Marathon 10:53:18 h97
2014
14.09 88km JPN5th Akiota Yajirushi Marathon 88km 10:44:11 h110
15.06 100km JPN9. Okinoshima 100km Ultra Marathon 12:19:29 h104
25.05 100km JPN21st Ebisu-Daikoku 100 km Marathon 11:45:16 h101
2013
16.06 100km JPN8. Okinoshima 100km Ultra Marathon 11:26:07 h63
26.05 100km JPN20th Ebisu-Daikoku 100 km Marathon 10:45:08 h70
2012
17.06 100km JPN7. Okinoshima 100km Ultra Marathon 10:44:38 h42
27.05 100km JPN19th Ebisu-Daikoku 100 km Marathon 10:06:12 h35
2011
19.06 100km JPN6. Okinoshima 100km Ultra Marathon 10:47:56 h55
29.05 100km JPN18th Ebisu-Daikoku 100 km Marathon 10:40:31 h84
30.04 72km JPN21st Fuji 5 Lakes 72 km Challenge 10:01:51 h404
2010
20.06 100km JPN5. Okinoshima 100km Ultra Marathon 11:03:16 h38