Hiroto (小松広人) Komatsu
Born : 1979 Cat. M45 Ultrarunner since 2010 JPN
43
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
70
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
5
Countries visited ?AUSAustraliaFRAFranceJPNJapanNZLNew ZealandUSAUnited States
13,5%
Rank quotient ?This runner's calculation uses 43 eligible race(s): Σ(rank − 1) = 3 999; Σ finishers = 29 548. 3 999 / 29 548 × 100 = 13.53%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed43
Km — ultra races6 190 km
> 100 km22
> 160 km14
> 200 km7
> 24h7
> 48h7
Longest race503,0 km

Km per year (ultra races)

519
5 races
2022
752
5 races
2023
665
3 races
2024
1 414
4 races
2025
1 121
4 races
2026

Race types (share of distance)

Road7,1%
Trail49,3%
Elim.43,5%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 33
🏅 Top 3 M3
Longest winning streak0
Current streak0

HISTORY

43 race(s)
DateRacePerf.Rk
2026
14.08 Backyard Ultra AUSThe Clint Eastwood Backyard Ultra 435.890 km (65h)3 🥉
30.05 Backyard Ultra AUSDead Cow Gully Backyard Ultra 422.478 km (63h)3 🥉
17.05 100km JPN32th Yatsugatake Nobeyama 100 km 12:57:36 h569
14.02 163km NZL8th Tarawera 100 Mile Endurance Run 25:35:57 h50
2025
18.10 Backyard Ultra USA14th Big Dog's Backyard Ultra 362.124 km (54h)48
21.06 Backyard Ultra AUSDead Cow Gully Backyard Ultra 502.950 km (75h)10
25.04 167km JPN10th Ultra-Trail Mt. Fuji 28:04:33 h96
20.02 Backyard Ultra JPN1st Last Samurai Standing Big's Challenge Cup 382.242 km (57h)4
2024
01.11 Backyard Ultra JPN5th Last Samurai Standing Backyard Ultra - Tokyo 375.536 km (56h)2 🥈
14.09 122km JPN7th Utsukushima Fukushima Journey Run 122K 15:32:10 h4
26.04 167km JPN9th Ultra-Trail Mt. Fuji 27:16:05 h54
2023
23.11 Backyard Ultra JPN4th Last Samurai Standing Backyard Ultra - Tokyo 214.592 km (32h)11
01.09 170km FRA20ème Ultra Trail Tour du Mont Blanc 38:58:26 h734
08.07 100km JPN1st Shiga Kogen 100 19:12:13 h85
10.06 100.8km JPN3rd Okushinano 100 13:05:42 h25
21.04 167km JPN8th Ultra-Trail Mt. Fuji 28:14:53 h115
2022
29.12 130km JPN3rd Kyoto Great Round 130 km 23:12:10 h7
20.11 106km JPN8th FunTrails100K Round 18:06:24 h18
17.07 65km JPN13th Nozawa Onsen 4100D Mountain Trail 9:17:16 h21
26.06 51km JPN3rd FunTrails Round Minano 7:35:16 h20
22.04 167km JPN7th Ultra-Trail Mt. Fuji 24:39:42 h63
2020
13.12 66km JPN7th Izu Trail Journey 8:39:27 h150
2019
13.07 100km JPN12th OSJ Ontake 100km Ultra Trail 12:30:28 h68
2018
16.12 68km JPNCoast to Coast 70k Trail Run 8:12:14 h44
14.10 50km JPN12th Madarao Forest Trails 50km 5:00:06 h11
07.10 71.5km JPN26th Hasetsune Cup - Japan Mountain Endurance Race 15:28:32 h391
27.04 170km JPN5th Ultra-Trail Mt. Fuji 29:55:19 h88
2017
16.09 102km JPN9th Shinetsu Five Mountains Trail 100 mile 17:20:53 h140
2016
19.11 105km JPN2nd FunTrails100K Round 19:59:54 h45
09.10 71.5km JPN24th Hasetsune Cup - Japan Mountain Endurance Race 10:54:33 h103
2015
19.07 118km JPN2nd SkyView Ultra-Trail - Yamada Noboru Memorial Cup 23:19:52 h47
28.06 72.7km JPN2. Spatrail - Shima to Kusatsu 8:44:22 h23
15.03 72km JPN2nd Izu Trail Journey 9:02:16 h62
2014
12.10 71.5km JPN22nd Hasetsune Cup - Japan Mountain Endurance Race 9:59:39 h106
2013
10.11 50km JPN5th Kanna Mountain Run II 8:12:40 h59
13.10 71.5km JPN21st Hasetsune Cup - Japan Mountain Endurance Race 11:20:39 h206
06.10 50km JPN7th Madarao Forest Trails 50km 5:53:08 h43
15.09 110km JPN5th Shinetsu Five Mountains Trail 110km 16:24:05 h85
26.04 84km JPN2nd Shizuoka to Yamanashi 13:43:11 h53
2012
11.11 50km JPN4th Kanna Mountain Run 7:49:56 h38
04.11 45km JPN4th Shinshu-Togakushi Trail Run Race 7:11:58 h86
2011
26.06 50km JPN26. Lake Saroma 50 km Ultramarathon 4:58:44 h49
2010
10.04 70km JPN5th Toda Saiko 70 km 8:51:00 h203