Chikara (小山松力) Oyamatsu
Born : 1971 Cat. M55 Ultrarunner since 2016 JPN
31
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
16,3%
Rank quotient ?This runner's calculation uses 31 eligible race(s): Σ(rank − 1) = 4 453; Σ finishers = 27 341. 4 453 / 27 341 × 100 = 16.29%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed31
Km — ultra races2 970 km
> 100 km5
> 160 km1
Longest race167,0 km

Km per year (ultra races)

496
5 races
2022
634
6 races
2023
517
5 races
2024
320
4 races
2025
100
1 race
2026

Race types (share of distance)

Road71,1%
Trail28,9%

Wins & podiums (ultra)

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

HISTORY

31 race(s)
DateRacePerf.Rk
2026
17.05 100km JPN32th Yatsugatake Nobeyama 100 km 12:10:29 h333
2025
19.10 70km JPN32. Ultramarathon Okumusashi 6:56:59 h39
28.09 50km JPN3rd Mount Akagi Trail Running Race 12:19:53 h46
08.06 100km JPN13th Hida Takayama 100 km Ultramarathon 10:31:59 h183
18.05 100km JPN31th Yatsugatake Nobeyama 100 km 11:55:51 h277
2024
01.12 50km JPN11th Trainic world Soto-Chichibu Trail Run 50km 7:58:03 h52
13.10 100km JPN15th Echigo Kubikino 100km Ultramarathon 9:52:55 h53
19.05 100km JPN30th Yatsugatake Nobeyama 100 km 12:00:41 h266
26.04 167km JPN9th Ultra-Trail Mt. Fuji 38:05:23 h564
16.03 100km JPN8th Minamiboso 100km 9:20:22 h3 🥉
2023
28.10 147km JPN5th Autumn leaves in Okumusashi / Chichibu Journey run 22:06:07 h54
24.09 100km JPN26th Muraoka 100 km Ultra Marathon 11:07:07 h46
16.07 109.2km JPN15th OSJ Ontake 100km Ultra Trail 13:21:36 h56
04.06 78km JPN30. Ultramarathon Okumusashi 7:37:07 h63
21.05 100km JPN29th Yatsugatake Nobeyama 100 km 10:15:00 h33
12.03 100km JPN5th Ibaraki 100k Ultra Marathon 8:43:13 h12
2022
09.10 71.5km JPN30th Hasetsune Cup - Japan Mountain Endurance Race 17:04:44 h578
25.09 100km JPN30. Akita Nairiku 100km Marathon 9:37:09 h36
16.07 106.5km JPN14th OSJ Ontake 100km Ultra Trail 13:44:58 h155
22.05 100km JPN28th Yatsugatake Nobeyama 100 km 11:02:23 h115
17.04 118km JPN32th Fuji 5 Lakes 118 km Challenge 12:10:16 h57
2019
29.09 53km JPN7th Trainic world Soto-Chichibu Trail Run 50km 8:14:30 h47
25.08 70km JPN6th Tsukuba Renjyo 70 km Road & Trail Run 10:01:32 h35
29.06 80km JPN9th Utsukushigahara 80 km Trail Run 12:48:25 h85
19.05 100km JPN25th Yatsugatake Nobeyama 100 km 10:06:16 h87
21.04 100km JPN29th Fuji 5 Lakes 100 km Challenge 9:25:57 h70
2018
24.06 100km JPN33. Lake Saroma 100 km Ultramarathon 8:32:12 h91
20.05 100km JPN24th Yatsugatake Nobeyama 100 km 10:37:37 h131
2017
15.10 100km JPN23rd River Shimanto 100km 9:11:29 h64
21.05 100km JPN23rd Yatsugatake Nobeyama 100 km 12:50:53 h480
2016
05.06 100km JPN4th Tokyo Shibamata 100 km 11:34:22 h373