Michiaki (山本光亮) Yamamoto
ID 310345
Born : 1973 Cat. M50 Ultrarunner since 2003 JPN
40
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
39,9%
Rank quotient ?This runner's calculation uses 40 eligible race(s): Σ(rank − 1) = 7 713; Σ finishers = 19 321. 7 713 / 19 321 × 100 = 39.92%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed41
Km — ultra races4 013 km
> 100 km9
> 160 km3
> 200 km3
Longest race251,0 km
20th River Road Foot Race 251 km — 3/5/2025

Km per year (ultra races)

419
5 races
2022
319
4 races
2023
614
4 races
2024
623
5 races
2025
410
3 races
2026

Race types (share of distance)

Road80,3%
Trail17,7%
Stage2,0%

Records

100 km11h09'3850 mi9h26'006 h55,34 km

HISTORY

41 race(s)
DateRacePerf.Rk
2026
17.05 100km JPN32th Yatsugatake Nobeyama 100 km 11:28:57 h217
11.04 8h JPN21st Toda Saiko 8 Hours 80.000 km12
14.03 230km JPN16th Little Edo Oedo 230k 34:18:20 h34
2025
22.08 101km JPN12th World Cultural Heritage "Fuji" Foot Race 11:46:00 h24
20.07 99.5km JPN17th OSJ Ontake 100km Ultra Trail 12:41:42 h146
18.05 100km JPN31th Yatsugatake Nobeyama 100 km 11:27:59 h195
03.05 251km JPN20th River Road Foot Race 251 km 44:21:31 h16
12.04 71km JPN20th Toda Saiko 70 km 6:23:54 h26
2024
23.08 101km JPN11th World Cultural Heritage "Fuji" Foot Race 12:23:22 h19
14.07 109.2km JPN16th OSJ Ontake 100km Ultra Trail 14:28:45 h253
03.05 251km JPN19th River Road Foot Race 251 km 46:22:43 h23
13.04 71km JPN19th Toda Saiko 70 km 6:32:08 h21
16.03 82km JPN12th Arakawa Riverside Journey Stage Race - Stage 1 8:17:35 h6
2023
18.08 101km JPN10th World Cultural Heritage "Fuji" Foot Race 12:16:36 h17
01.07 8h JPN29th 8-Hour Endurance Race Tokorozawa 68.600 km24
04.06 78km JPN30. Ultramarathon Okumusashi 8:48:09 h182
08.04 71km JPN18th Toda Saiko 70 km 6:36:03 h32
2022
02.10 100km JPN9th Naeba-Sanroku Geopark Tsunan Ultramarathon 100K 11:09:38 h7
20.08 101km JPN9th World Cultural Heritage "Fuji" Foot Race 12:09:45 h8
03.07 8h JPN28th 8-Hour Endurance Race Tokorozawa 68.600 km45
05.06 78km JPN29. Ultramarathon Okumusashi 8:13:11 h171
09.04 71km JPN17th Toda Saiko 70 km 6:40:35 h21
2021
30.10 146km JPN3rd Autumn leaves in Okumusashi / Chichibu Journey run 18:20:15 h28
04.07 8h JPN27th 8-Hour Endurance Race Tokorozawa 78.400 km63
10.04 70km JPN16th Toda Saiko 70 km 6:11:04 h73
03.04 80km JPN9th Arakawa Riverside Journey - 80 km 9:26:00 h5
2019
19.05 100km JPN25th Yatsugatake Nobeyama 100 km 13:49:42 h1377
13.04 70km JPN14th Toda Saiko 70 km 7:17:55 h180
2018
20.05 100km JPN24th Yatsugatake Nobeyama 100 km 13:38:42 h1189
2017
30.09 6h JPN6th Coedo Kawagoe Running Fest 6-hours run 55.335 km6
08.04 70km JPN12th Toda Saiko 70 km 7:00:52 h168
2016
21.08 97km JPN4th World Cultural Heritage "Fuji" Foot Race 13:02:00 h25
22.05 100km JPN22nd Yatsugatake Nobeyama 100 km 12:51:58 h643
09.04 70km JPN11th Toda Saiko 70 km 6:57:35 h86
2015
11.04 70km JPN10th Toda Saiko 70 km 7:13:15 h142
2014
07.12 6h JPN3rd Coedo Kawagoe 6 Hours Run 52.200 km30
2013
13.04 70km JPN8th Toda Saiko 70 km 8:08:39 h210
2012
20.05 100km JPN18th Yatsugatake Nobeyama 100 km 13:35:14 h742
2008
18.05 100km JPN14th Yatsugatake Nobeyama 100 km 12:30:10 h294
2005
22.05 100km JPN11th Yatsugatake Nobeyama 100 km 13:47:09 h446
2003
11.05 100km JPN9th Yatsugatake Nobeyama 100 km 13:58:27 h553