Kazuya (古割一哉) Kowari
Born : 1965 Cat. M60 Ultrarunner since 2013 JPN
30
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
42
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
39,0%
Rank quotient ?This runner's calculation uses 30 eligible race(s): Σ(rank − 1) = 5 854; Σ finishers = 14 999. 5 854 / 14 999 × 100 = 39.03%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed30
Km — ultra races2 486 km
> 100 km7
> 160 km2
Longest race170,0 km

Km per year (ultra races)

2022
61
1 race
2023
249
3 races
2024
2025
58
1 race
2026

Race types (share of distance)

Road32,6%
Trail67,4%

HISTORY

30 race(s)
DateRacePerf.Rk
2026
20.06 58km JPN2nd Kaga Spa by UTMB - Kaga Spa Trail Endurance 50 11:53:39 h490
2024
08.12 70km JPN11th Izu Trail Journey 12:35:38 h920
26.04 70km JPN3rd KAI 70k 13:57:21 h336
23.03 109km JPN2nd Hiroshima Wangan Trail Run 27:03:58 h263
2023
11.08 61.3km JPN4th Osaka Natsunojin Kurondo Rondo - 60 km 14:01:39 h25
2019
03.11 47.1km JPN14th Kyoto Mount Chop 8:15:09 h16
11.05 121km JPN3rd Aso Round Trail 25:52:36 h129
23.03 112km JPN20th Mt. Rocco Cannonball Run - 112 km Power 19:22:00 h82
2018
03.11 48km JPN2nd Ninja Trail Run 6:58:24 h63
15.09 100mi JPN10th Shinetsu Five Mountains Trail 100 mile 31:36:59 h225
27.04 170km JPN5th Ultra-Trail Mt. Fuji 39:27:51 h373
24.03 112km JPN18th Mt. Rocco Cannonball Run - 112 km Power 17:05:00 h29
2017
01.10 74.5km JPN2nd Shinjo-Hiruzen Super Trail 12:09:41 h79
15.07 100km JPN10th OSJ Ontake 100km Ultra Trail 13:54:04 h233
13.05 50km JPN3rd Mt. Hiei Int. 50 km Trail Run 8:41:22 h210
26.03 56km JPN16th Mt. Rocco Cannonball Run - 56 km Speed 7:47:09 h145
2016
18.09 110km JPN8th Shinetsu Five Mountains Trail 110km 17:26:57 h201
02.07 80km JPN6th Utsukushigahara 80 km Trail Run 13:35:45 h192
24.04 70km JPN2nd Okumikawa Power Trail 12:45:06 h422
2015
18.10 73km JPN6th OSJ Hyonosen Mountains Trail Race 11:51:19 h176
27.09 100km JPN18th Muraoka 100 km Ultra Marathon 12:19:27 h150
04.07 80km JPN5th Utsukushigahara 80 km Trail Run 12:59:35 h148
30.05 50km JPN1st Mt. Hiei Int. 50 km Trail Run 9:20:03 h181
17.05 77km JPNSaba Highway Ultramarathon 8:51:08 h62
29.03 56km JPN12th Mt. Rocco Cannonball Run - 56 km Speed 7:12:29 h57
15.03 72km JPN2nd Izu Trail Journey 11:28:20 h396
2014
28.09 66km JPN17th Muraoka 66 km Ultra Marathon 6:58:50 h18
25.05 100km JPN21st Ebisu-Daikoku 100 km Marathon 10:40:09 h52
30.03 56km JPN10th Mt. Rocco Cannonball Run - 56 km Speed 8:24:00 h113
2013
19.05 76km JPNSaba Highway Ultramarathon 9:17:54 h98