Masato (若杉正人) Wakasugi
ID 763783
Born : 1980 Cat. M45 Ultrarunner since 2016 JPN
32
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
36,4%
Rank quotient ?This runner's calculation uses 32 eligible race(s): Σ(rank − 1) = 6 602; Σ finishers = 18 162. 6 602 / 18 162 × 100 = 36.35%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed32
Km — ultra races3 485 km
> 100 km15
> 160 km6
> 200 km1
> 24h3
Longest race202,1 km
17th Jingu Gaien 24 Hour Challenge — 28/3/2026

Km per year (ultra races)

301
3 races
2022
819
9 races
2023
693
6 races
2024
514
4 races
2025
202
1 race
2026

Race types (share of distance)

Road43,1%
Trail52,3%
Elim.4,6%

Records

50 km6h03'55100 km10h09'23100 mi21h46'5224 h202,13 kmBackyard24 loops

HISTORY

32 race(s) · 2 split(s) nested
DateRacePerf.Rk
2026
28.03 24h JPN17th Jingu Gaien 24 Hour Challenge 202.130 km15
2025
02.11 100km JPN5th OSJ Kami 100 20:27:48 h83
19.07 100mi JPN17th OSJ Ontake 100 Mile Ultra Trail 21:46:52 h63
08.03 24h JPN16th Jingu Gaien 24 Hour Challenge 153.261 km55
22.02 100km JPN3rd Daimonji 100 24:20:01 h36
2024
01.11 Backyard Ultra JPN5th Last Samurai Standing Backyard Ultra - Kyoto 160.944 km (24h)7
13.10 111km JPN1st North Ontake Ultra 13:46:33 h34
14.07 109.2km JPN16th OSJ Ontake 100km Ultra Trail 13:54:27 h196
09.06 100km JPN12th Hida Takayama 100 km Ultramarathon 11:42:32 h433
03.05 100mi JPN4th Yarikan 100 32:09:08 h24
14.04 51.4km JPN2nd AYABE Trailrun 7:01:54 h59
2023
04.11 112km JPN3rd OSJ Kami 100 19:17:17 h35
01.10 70km JPN8th Okumikawa Power Trail 11:17:53 h35
17.09 100km JPN21th Tango 100 km Ultramarathon 12:00:37 h188
02.09 59km JPN7th Kyoto Grand Traverse 10:17:36 h84
16.07 109.2km JPN15th OSJ Ontake 100km Ultra Trail 16:02:32 h223
10.06 100.8km JPN3rd Okushinano 100 19:23:47 h439
13.05 50km JPN9th Mt. Hiei Int. 50 km Trail Run 8:34:00 h118
21.04 167km JPN8th Ultra-Trail Mt. Fuji 32:59:24 h370
09.04 51.4km JPN1st AYABE Trailrun 7:38:10 h114
2022
05.11 100km JPN2nd OSJ Kami 100 24:34:00 h142
11.06 100.8km JPN2nd Okushinano 100 20:09:35 h437
16.04 100km JPN1st Atsumi Peninsula Ultra Nature Run - 100km 13:52:28 h75
2021
09.10 168.5km JPN7th OSJ Koumi 100 35:53:24 h259
25.04 50km JPN14th Ishioka Trail Run 6:03:55 h97
2018
22.04 118km JPN28th Fuji 5 Lakes 118 km Challenge 12:54:34 h98
2017
04.06 100km JPN5th Tokyo Shibamata 100 km 13:20:00 h1053
23.04 118km JPN27th Fuji 5 Lakes 118 km Challenge 12:58:21 h132
2016
16.10 100km JPN22nd River Shimanto 100km 10:09:23 h169
18.09 100km JPN16th Tango 100 km Ultramarathon 11:23:12 h252
26.06 100km JPN31. Lake Saroma 100 km Ultramarathon 11:27:48 h1156
17.01 100km JPN26th Miyako 100 km Ultramarathon 12:14:05 h153