Manabu (大佐々学) Ohsasa
ID 384017
Born : 1973 Cat. M50 Ultrarunner since 2012 JPN
36
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
36,7%
Rank quotient ?This runner's calculation uses 36 eligible race(s): Σ(rank − 1) = 4 461; Σ finishers = 12 171. 4 461 / 12 171 × 100 = 36.65%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed37
Km — ultra races3 496 km
> 100 km7
> 160 km1
> 200 km1
Longest race203,0 km
3rd Little Edo Oedo 200k — 2/3/2013

Km per year (ultra races)

110
1 race
2022
561
6 races
2023
584
7 races
2024
495
5 races
2025
2026

Race types (share of distance)

Road63,6%
Trail13,8%
Stage3,7%
Ult.Walk18,9%

Wins & podiums (ultra)

🏆 Win1
🏆 Win M1
🏅 Top 32
🏅 Top 3 M4
Longest winning streak1
Current streak0

Records

50 km7h26'51100 km10h30'59

HISTORY

36 race(s) · 2 stage(s) nested
DateRacePerf.Rk
2025
13.12 100km JPN3rd Okinawa Churaumi Ultra Walking 17:11:36 h10
01–02.11 130km/2stages JPN3rd Mito Kaido Journey run 19:11:22 h31
23.08 100km JPN1st Summer Karuizawa and Joshu Nakasendo Ultra Walking 18:34:34 h9
28.06 65km JPN1st Lavender Road that runs through Asahikawa Biei and Furano 10:11:28 h4
20.04 100km JPN6th Yamadera Zao 100 km Ultra Marathon 13:26:15 h66
2024
01.12 52km JPN10th Kumano Old Trails 9:44:26 h95
03.08 105km JPN1st Shinshu Nakasendo 12 Stations Ultra Race 17:56:50 h5
15.06 50km JPN1st One Day Walking 7:26:51 h6
26.05 100km JPN30th Ebisu-Daikoku 100 km Marathon 13:25:31 h193
19.05 77km JPN29th Saba Highway Ultramarathon 10:37:20 h205
04.02 100km JPN3rd Amami yori yori Run 13:29:13 h23
13.01 100km JPN1st Nara Mahoroba Ultra Walking 16:04:52 h4
2023
18.11 100km JPN1st Owari Mikawa Ultra Walking 16:10:25 h1 🏆
21.10 100km JPN6th Iki 100 km Ultra Marathon 13:02:13 h213
16.09 100km JPN9th Nishi Seto Expressway Ultra Run 16:10:42 h2 🥈
18.06 100km JPN16. Okinoshima 100km Ultra Marathon 12:39:09 h80
09.04 51.4km JPN1st AYABE Trailrun 8:20:29 h184
11.02 110km JPN1st Awaji Island Round Ultra 17:47:24 h8
2022
26.11 110km JPN1st Kyoto Ultra Walking 110km 19:00:16 h7
2021
15.05 125km JPN1st Sengoku Crossroads Ultra Run 20:27:05 h11
2020
31.10 104km JPN1st Shodoshima Round Ultra Run 18:38:20 h22
22.02 100km JPN2nd Hakone Kodo Ultra Walking 19:51:38 h19
2019
02.11 100km JPN2nd Nakasendo to Kisoji Ultra Run 22:09:09 h13
2018
03.06 53.7km JPN18th Rishiri Island Ultra Marathon 7:46:05 h350
2014
12.10 60km JPN10th Echigo Kubikino 60km Ultramarathon 7:11:18 h175
07.06 100km JPN24th Aso Caldera Super Marathon 100 km 10:45:01 h158
18.05 100km JPN20th Yatsugatake Nobeyama 100 km 12:32:00 h456
12.01 100km JPN24th Miyako 100 km Ultramarathon 11:56:19 h131
2013
29.09 100km JPN1st 100 km Ultramarathon Hakusan-Shirakawago 12:26:33 h213
09.06 100km JPN9th Iwate Ginga 100km Marathon Challenge 11:52:04 h320
28.04 100km JPN15. Okukumano 100 km Ultramarathon 10:30:59 h23
02.03 203km JPN3rd Little Edo Oedo 200k 33:56:30 h93
2012
06.10 100km JPN9th Echigo Kubikino 100km Ultramarathon 11:36:44 h334
21.09 100km JPN12th Tango 100 km Ultramarathon 13:30:19 h563
19.08 100km JPN2nd North Okhotsk 100 km Marathon 12:19:57 h103
10.06 100km JPN1st Hida Takayama 100 km Ultramarathon 12:54:36 h367