Teruo (山脇輝夫) Yamawaki
ID 832558
Born : 1974 Cat. M50 Ultrarunner since 2016 JPN
25
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
46
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
29,3%
Rank quotient ?This runner's calculation uses 25 eligible race(s): Σ(rank − 1) = 3 363; Σ finishers = 11 484. 3 363 / 11 484 × 100 = 29.28%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed25
Km — ultra races2 388 km
> 100 km2
Longest race155,0 km
3rd Tone River Run Up Journey Run Downstream — 1/4/2023

Km per year (ultra races)

300
3 races
2022
455
4 races
2023
300
3 races
2024
100
1 race
2025
100
1 race
2026

Race types (share of distance)

Road94,2%
Trail5,8%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 31
🏅 Top 3 M1
Longest winning streak0
Current streak0

Records

50 km5h12'04100 km10h12'32

HISTORY

25 race(s)
DateRacePerf.Rk
2026
14.06 100km JPN20th Iwate Ginga 100km Marathon Challenge 12:34:41 h374
2025
08.06 100km JPN19th Iwate Ginga 100km Marathon Challenge 11:36:43 h224
2024
22.09 100km JPN32. Akita Nairiku 100km Marathon 11:17:43 h79
09.06 100km JPN18th Iwate Ginga 100km Marathon Challenge 11:07:31 h164
21.04 100km JPN5th Yamadera Zao 100 km Ultra Marathon 11:43:20 h33
2023
24.09 100km JPN31. Akita Nairiku 100km Marathon 10:32:42 h76
11.06 100km JPN17th Iwate Ginga 100km Marathon Challenge 10:58:34 h115
23.04 100km JPN4th Yamadera Zao 100 km Ultra Marathon 12:16:36 h23
01.04 155km JPN3rd Tone River Run Up Journey Run Downstream 19:54:24 h3 🥉
2022
25.09 100km JPN30. Akita Nairiku 100km Marathon 11:04:02 h84
12.06 100km JPN16th Iwate Ginga 100km Marathon Challenge 11:00:43 h186
24.04 100km JPN3rd Yamadera Zao 100 km Ultra Marathon 15:57:54 h16
2021
31.10 55km JPN2nd Yamadera Zao 100 km Ultra Marathon 5:55:56 h43
2019
08.12 100km JPN2nd Tobishima Ultra Marathon 10:41:36 h28
22.09 100km JPN29. Akita Nairiku 100km Marathon 10:12:32 h80
12.05 100km JPN26th Ebisu-Daikoku 100 km Marathon 10:54:23 h89
2018
23.09 100km JPN28. Akita Nairiku 100km Marathon 10:52:35 h97
25.08 65km JPN21st Mt. Tateyama Climbathon 9:01:43 h64
10.06 50km JPN2nd Koyasan and Ryujin-Onsen 50 km Ultra Marathon 5:12:04 h35
20.05 72km JPN23th Saba Highway Ultramarathon 8:10:27 h93
22.04 118km JPN28th Fuji 5 Lakes 118 km Challenge 13:46:43 h184
2017
24.09 100km JPN27. Akita Nairiku 100km Marathon 12:00:36 h227
25.06 72.7km JPN4. Spatrail - Shima to Kusatsu 10:45:59 h217
2016
25.09 100km JPN26. Akita Nairiku 100km Marathon 12:54:21 h466
12.06 100km JPN12th Iwate Ginga 100km Marathon Challenge 12:13:57 h388