Kazuhiro (山本和宏) Yamamoto
Born : 1975 Cat. M50 Ultrarunner since 2004 JPN
44
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
51
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
55,5%
Rank quotient ?This runner's calculation uses 44 eligible race(s): Σ(rank − 1) = 15 457; Σ finishers = 27 833. 15 457 / 27 833 × 100 = 55.53%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed45
Km — ultra races3 838 km
> 100 km8
> 160 km2
> 200 km2
Longest race250,0 km

Km per year (ultra races)

149
2 races
2022
232
3 races
2023
2024
72
1 race
2025
50
1 race
2026

Race types (share of distance)

Road47,3%
Trail50,1%
Stage2,6%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 31
🏅 Top 3 M1
Longest winning streak0
Current streak0

HISTORY

44 race(s) · 2 stage(s) nested
DateRacePerf.Rk
2026
24.05 50km JPN11th Akiyoshidai Karst Trail Run 6:48:13 h50
2025
12.10 71.5km JPN33th Hasetsune Cup - Japan Mountain Endurance Race 19:02:22 h725
2023
08.10 71.5km JPN31th Hasetsune Cup - Japan Mountain Endurance Race 16:26:13 h734
28.05 60km JPN8th Akiyoshidai Karst Trail Run 6:34:43 h11
04–05.03 100km/2stages JPN2nd Ultra Udon Maranic 15:27:39 h88
2022
17.07 65km JPN2nd Yamaguchi Hagi Return 7:18:22 h3 🥉
12.06 84.39km JPN6th JAL Mukatsuku Double Marathon 8:37:32 h41
2021
24.10 66km JPN6th Osorakan-Trail 66 km 10:16:24 h6
18.07 65km JPN1st Yamaguchi Hagi Return 8:21:10 h24
2019
15.12 100km JPN4th Okinawa 100km Ultramarathon 10:36:33 h67
13.07 65km JPN10th Nozawa Onsen 4100D Mountain Trail 10:45:06 h92
02.06 52.7km JPN2nd Nagi Peaks Tough Trail Challenge 11:11:53 h93
2018
16.12 100km JPN3rd Okinawa 100km Ultramarathon 12:05:17 h132
07.10 71.5km JPN26th Hasetsune Cup - Japan Mountain Endurance Race 16:55:45 h576
14.07 65km JPN9th Nozawa Onsen 4100D Mountain Trail 11:02:56 h35
2017
17.12 100km JPN2nd Okinawa 100km Ultramarathon 11:35:03 h104
16.09 102km JPN9th Shinetsu Five Mountains Trail 100 mile 18:07:41 h180
15.07 65km JPN8th Nozawa Onsen 4100D Mountain Trail 11:47:31 h129
28.05 65km JPN2nd Osorakan-Trail 13:00:22 h189
14.05 100km JPN21th 100 km Ultramarathon Ako Seaside Park 11:51:13 h16
2016
18.12 100km JPN1st Okinawa 100km Ultramarathon 12:03:37 h109
23.10 56km JPN15th Mt. Rocco Cannonball Run - 56 km Speed 8:54:00 h157
09.10 71.5km JPN24th Hasetsune Cup - Japan Mountain Endurance Race 17:24:12 h1038
18.09 110km JPN8th Shinetsu Five Mountains Trail 110km 19:19:08 h335
19.06 50km JPN2nd Echigo Country Trail 8:33:53 h98
05.06 66km JPN1st Osakikamijima Ultra Marthon 5:38:27 h14
15.05 100km JPN20th 100 km Ultramarathon Ako Seaside Park 12:24:44 h17
2015
21.11 104km JPN1st FunTrails100K Round 30:39:36 h343
31.10 71.5km JPN23rd Hasetsune Cup - Japan Mountain Endurance Race 20:08:54 h1738
22.09 110km JPN7th Shinetsu Five Mountains Trail 110km 20:10:34 h359
30.08 70km JPN2nd Tsukuba Renjyo 70 km Road & Trail Run 10:52:24 h195
08.02 50km JPN6th OSJ Jungle Trail 50K Amami 6:52:33 h106
2014
12.10 71.5km JPN22nd Hasetsune Cup - Japan Mountain Endurance Race 19:03:57 h1550
2013
13.10 71.5km JPN21st Hasetsune Cup - Japan Mountain Endurance Race 17:55:07 h1337
2012
07.10 71.5km JPN20th Hasetsune Cup - Japan Mountain Endurance Race 19:37:08 h1545
12.02 50km JPN3rd OSJ Jungle Trail 50K Amami 7:12:59 h65
2011
09.10 71.5km JPN19th Hasetsune Cup - Japan Mountain Endurance Race 19:09:39 h1198
22.05 100km JPN3rd 100 km Ultra Maranic Osaka 11:56:00 h115
2010
10.10 71.5km JPN18th Hasetsune Cup - Japan Mountain Endurance Race 16:57:36 h721
2009
02.05 250km JPN21. Yamaguchi 100 Hagi-O-Kan Maranic 250 km 46:09:22 h143
2008
02.05 250km JPN20. Yamaguchi 100 Hagi-O-Kan Maranic 250 km 42:51:57 h57
2006
08.10 71.5km JPN14th Hasetsune Cup - Japan Mountain Endurance Race 18:57:10 h899
2005
03.05 140km JPN17. Yamaguchi 100 Hagi-O-Kan Maranic 140 km 19:49:34 h40
2004
03.05 140km JPN16. Yamaguchi 100 Hagi-O-Kan Maranic 140 km 22:31:47 h27