Takayuki (大羽孝之) Oba
ID 1636634
Ultrarunner since 2020 JPN
26
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
24,9%
Rank quotient ?This runner's calculation uses 26 eligible race(s): Σ(rank − 1) = 1 230; Σ finishers = 4 944. 1 230 / 4 944 × 100 = 24.88%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed26
Km — ultra races2 967 km
> 100 km18
> 160 km2
Longest race200,0 km
9th Ultra Walking around Lake Biwa — 2/5/2026

Km per year (ultra races)

565
5 races
2022
445
4 races
2023
726
7 races
2024
504
4 races
2025
402
3 races
2026

Race types (share of distance)

Road21,2%
Trail17,9%
Ult.Walk60,8%

Records

100 km18h23'51

HISTORY

26 race(s)
DateRacePerf.Rk
2026
02.05 200km JPN9th Ultra Walking around Lake Biwa 46:54:17 h81
28.03 100km JPN2nd Tokyo Story Ultra Walking 20:24:10 h39
10.01 102km JPN3rd Nara Mahoroba Ultra Walking 19:28:13 h54
2025
23.08 100km JPN1st Summer Karuizawa and Joshu Nakasendo Ultra Walking 24:01:22 h74
19.07 102km JPN2nd Shinshu Nakasendo 12 Stations Ultra Race 27:06:20 h138
03.05 200km JPN8th Ultra Walking around Lake Biwa 45:33:03 h54
11.01 102km JPN2nd Nara Mahoroba Ultra Walking 21:04:38 h73
2024
23.11 103km JPN3rd Kyoto Ultra Walking 110km 20:42:13 h42
14.09 100km JPN10th Nishi Seto Expressway Ultra Run 24:28:52 h128
03.08 105km JPN1st Shinshu Nakasendo 12 Stations Ultra Race 24:29:08 h58
13.07 105km JPN4th Nihondaira and Suruganokuni Ultra Run 22:21:41 h22
08.06 110km JPN2nd Awaji Island Round Ultra 21:08:59 h17
06.04 103km JPN7th Ultra Walking around Lake Biwa 18:31:39 h29
13.01 100km JPN1st Nara Mahoroba Ultra Walking 18:27:21 h16
2023
25.11 110km JPN2nd Kyoto Ultra Walking 110km 21:11:55 h17
16.09 100km JPN9th Nishi Seto Expressway Ultra Run 21:48:09 h53
10.06 125km JPN7th Fujisan Issyu Walking 24:16:10 h52
11.02 110km JPN1st Awaji Island Round Ultra 20:18:02 h18
2022
26.11 110km JPN1st Kyoto Ultra Walking 110km 21:44:08 h32
11.06 125km JPN6th Fujisan Issyu Walking 24:12:54 h38
21.05 125km JPN2nd Sengoku Crossroads Ultra Run 21:05:33 h14
09.04 100km JPN5th Ultra Walking around Lake Biwa 18:23:51 h20
11.02 105km JPN1st Kobe Akashi Ultra Marathon 21:06:12 h21
2021
16.10 100km JPN4th Nakasendo to Kisoji Ultra Run 24:20:07 h56
12.06 125km JPN5th Fujisan Issyu Walking 25:46:40 h61
2020
17.10 100km JPN3rd Nakasendo to Kisoji Ultra Run 24:55:32 h49