Yuki (丸山有紀) Maruyama
ID 537145
Born : 1971 Cat. W55 Ultrarunner since 2013 JPN
42
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
15,5%
Rank quotient ?This runner's calculation uses 42 eligible race(s): Σ(rank − 1) = 3 678; Σ finishers = 23 704. 3 678 / 23 704 × 100 = 15.52%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed42
Km — ultra races3 521 km
> 100 km8
> 160 km1
Longest race160,9 km
11th OSJ Koumi 100 — 12/10/2025

Km per year (ultra races)

123
2 races
2022
171
3 races
2023
365
5 races
2024
701
8 races
2025
420
5 races
2026

Race types (share of distance)

Road38,4%
Trail61,6%

Wins & podiums (ultra)

🏆 Win0
🏆 Win F2
🏅 Top 30
🏅 Top 3 F14
Longest winning streak0
Current streak0

Records

50 km6h11'26100 km9h15'4950 mi12h44'11100 mi30h56'17

HISTORY

42 race(s)
DateRacePerf.Rk
2026
04.07 90km JPN5th Central Alps Skyline Japan 14:52:10 h37
13.06 60km JPN12th Fairy Trail - Super Long 10:24:58 h33
17.05 100km JPN32th Yatsugatake Nobeyama 100 km 11:45:50 h252
09.05 50km JPN12th Mt. Hiei Int. 50 km Trail Run 9:04:20 h138
19.04 120km JPN36th Fuji 5 Lakes Sparta Challenge 14:25:06 h241
2025
07.12 52km JPN11th Kumano Old Trails 7:13:36 h23
12.10 100mi JPN11th OSJ Koumi 100 30:56:17 h35
20.09 130km JPN11th SkyViewTrail Memorial Cup 27:14:13 h26
05.07 90km JPN4th Central Alps Skyline Japan 15:13:49 h24
14.06 105km JPN3rd Okumusashi Long Trail Race 105K 26:04:05 h43
25.05 62km JPN17th OSJ Okukuji Trail 60k 11:25:55 h77
27.04 50km JPN18th Ishioka Trail Run 6:11:26 h44
06.04 51.4km JPN3rd AYABE Trailrun 7:09:41 h66
2024
16.11 100km JPN10th FunTrails100K Round 20:29:05 h29
22.09 80km JPN10th SkyViewTrail Memorial Cup 12:44:11 h29
25.08 75km JPN11th Tsukuba Renjyo 70 km Road & Trail Run 10:30:16 h31
08.06 60km JPN11th Fairy Trail - Super Long 10:05:29 h45
11.05 50km JPN10th Mt. Hiei Int. 50 km Trail Run 9:05:21 h152
2023
07.10 73km JPN8th Gasando Trail running race 11:44:53 h53
27.08 48km JPN10th Tsukuba Renjyo 48 km Road & Trail Run 6:23:10 h42
21.05 50km JPN2nd Futagamiyama Trailrun 6:57:59 h13
2022
06.11 50km JPN6th Koshu Alps Lily Route Challenge 8:38:12 h29
15.10 73km JPN7th Gasando Trail running race 11:49:06 h113
2019
03.11 50km JPN3rd Koshu Alps Lily Route Challenge 9:08:47 h37
07.10 118km JPN1st Fuji 5 Lakes 118 km Autumn Challenge 11:52:55 h13
15.09 60km JPN19th Tango 60 km Ultramarathon 6:22:20 h72
19.05 100km JPN25th Yatsugatake Nobeyama 100 km 9:54:03 h68
21.04 118km JPN29th Fuji 5 Lakes 118 km Challenge 11:08:07 h19
24.03 100km JPN1st Ibaraki 100k Ultra Marathon 9:15:49 h46
2018
09.09 100km JPN6th 100 km Ultramarathon Hakusan-Shirakawago 9:55:22 h50
10.06 100km JPN7th Hida Takayama 100 km Ultramarathon 10:27:52 h154
20.05 100km JPN24th Yatsugatake Nobeyama 100 km 9:56:46 h76
22.04 118km JPN28th Fuji 5 Lakes 118 km Challenge 12:05:54 h53
2017
11.06 100km JPN6th Hida Takayama 100 km Ultramarathon 9:34:02 h73
21.05 100km JPN23rd Yatsugatake Nobeyama 100 km 10:57:43 h124
23.04 118km JPN27th Fuji 5 Lakes 118 km Challenge 12:00:27 h60
2016
11.09 53km JPN6th Hakuba Int. Trail Run 6:37:47 h50
22.05 100km JPN22nd Yatsugatake Nobeyama 100 km 11:13:45 h207
2015
17.05 100km JPN21st Yatsugatake Nobeyama 100 km 10:41:25 h156
2014
14.09 53km JPN4th Hakuba Int. Trail Run 8:04:25 h197
18.05 100km JPN20th Yatsugatake Nobeyama 100 km 12:38:09 h489
2013
15.09 53km JPN3rd Hakuba Int. Trail Run 7:38:09 h201