Tetsuji (山口哲司) Yamaguchi
ID 288972
Born : 1965 Cat. M60 Ultrarunner since 2010 JPN
29
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
45
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
2
Countries visited ?JPNJapanUSAUnited States
64,8%
Rank quotient ?This runner's calculation uses 29 eligible race(s): Σ(rank − 1) = 9 119; Σ finishers = 14 065. 9 119 / 14 065 × 100 = 64.83%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed29
Km — ultra races2 481 km
> 100 km4
> 160 km3
Longest race170,6 km
11th Mogollon Monster 100 Mile — 10/9/2022

Km per year (ultra races)

321
3 races
2022
200
3 races
2023
50
1 race
2024
100
1 race
2025
80
1 race
2026

Race types (share of distance)

Road49,3%
Trail50,7%

Wins & podiums (ultra)

🏆 Win1
🏆 Win M1
🏅 Top 32
🏅 Top 3 M2
Longest winning streak1
Current streak0

Records

50 km5h19'58100 km12h42'2050 mi10h43'29

HISTORY

29 race(s)
DateRacePerf.Rk
2026
19.04 80km JPN36th Fuji 4 Lakes 80 km Challenge 10:43:29 h147
2025
14.12 100km JPN6th Tobishima Ultra Marathon 14:06:09 h185
2024
13.10 50km JPN15th Echigo Kubikino 50km Ultramarathon 5:56:32 h115
2023
16.04 100km JPN33th Fuji 4 Lakes 100 km Challenge 13:28:28 h846
04.03 50km USA42th Cross Timbers Trail Run 6:14:57 h3 🥉
14.01 50km USA9th Ouachita Switchbacks 50K 6:49:46 h9
2022
10.09 106mi USA11th Mogollon Monster 100 Mile 34:45:10 h69
17.04 100km JPN32th Fuji 5 Lakes 100 km Challenge 12:51:25 h669
26.03 50km USA41th Cross Timbers Trail Run 5:50:52 h1 🏆
2021
13.11 50km USA24th Rockledge Rumble Trail Run 5:19:58 h9
11.09 106mi USA10th Mogollon Monster 100 Mile 32:43:13 h26
16.01 50km USA8th Ouachita Switchbacks 50K 6:41:31 h14
2020
18.01 50km USA7th Ouachita Switchbacks 50K 7:07:00 h14
2019
14.09 106mi USA8th Mogollon Monster 100 Mile 35:26:22 h72
18.05 56mi USA7th Cruel Jewel 50 Mile 15:26:39 h16
21.04 100km JPN29th Fuji 5 Lakes 100 km Challenge 12:53:24 h845
2018
10.11 50km USA4th Franklin Mountains Trail Run 7:51:55 h29
15.09 105km USA7th Mogollon Monster 105 km 19:26:24 h11
19.05 50mi USA13th Jemez Mountain 50mi Trail Run 12:52:06 h53
2017
11.11 50km USA22nd Rockledge Rumble Trail Run 5:52:17 h16
23.04 100km JPN27th Fuji 5 Lakes 100 km Challenge 13:13:32 h910
2016
09.10 100km JPN11th Echigo Kubikino 100km Ultramarathon 13:22:50 h1234
24.04 71km JPN26th Fuji 5 Lakes 71 km Challenge 9:59:30 h586
2014
20.04 100km JPN24th Fuji 5 Lakes 100 km Challenge 12:42:20 h640
2013
29.09 50km JPN1st 50 km Ultramarathon Hakusan-Shirakawago 7:23:12 h350
2012
06.10 100km JPN9th Echigo Kubikino 100km Ultramarathon 13:25:08 h1077
10.06 72km JPN1st Hida Takayama 72 km Ultramarathon 9:28:43 h101
22.04 100km JPN22nd Fuji 5 Lakes 100 km Challenge 13:43:28 h929
2010
16.05 71km JPN16th Yatsugatake Nobeyama 71 km 9:54:33 h172