Masaya (栗山昌也) Kuriyama
ID 549664
Born : 1962 Cat. M60 Ultrarunner since 2014 JPN
44
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
67
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
65,1%
Rank quotient ?This runner's calculation uses 44 eligible race(s): Σ(rank − 1) = 17 301; Σ finishers = 26 584. 17 301 / 26 584 × 100 = 65.08%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed44
Km — ultra races5 997 km
> 100 km19
> 160 km8
> 200 km6
Longest race516,0 km
20th River Road Foot Race 514 km — 30/4/2025

Km per year (ultra races)

764
3 races
2022
513
1 race
2023
2024
631
2 races
2025
2026

Race types (share of distance)

Road71,6%
Trail28,4%

Records

100 km10h54'58

HISTORY

44 race(s)
DateRacePerf.Rk
2025
30.04 516km JPN20th River Road Foot Race 514 km 5d 10:35:15 h74
15.03 115km JPN15th Oedo Night run 115k 18:06:18 h42
2023
30.04 513km JPN18th River Road Foot Race 513 km 5d 00:13:57 h34
2022
26.06 51km JPN3rd FunTrails Round Minano 11:22:52 h239
30.04 513km JPN17th River Road Foot Race 513 km 5d 03:43:54 h32
12.03 200km JPN12th Little Edo Oedo 200k 33:42:16 h119
2021
30.10 146km JPN3rd Autumn leaves in Okumusashi / Chichibu Journey run 22:55:08 h133
03.05 251km JPN16th River Road Foot Race 254 km 46:25:31 h23
27.02 200km JPN11th Little Edo Oedo 200k 32:32:05 h91
2020
22.02 206km JPN10th Little Edo Oedo 205k 34:15:29 h153
2019
21.09 143km JPN6th SkyView Ultra-Trail 140 - Yamada Noboru Memorial Cup 37:28:14 h552
13.07 100km JPN12th OSJ Ontake 100km Ultra Trail 18:20:14 h734
25.05 103km JPN8th Tojinbo 103 km Ultramarathon 14:18:03 h61
19.05 100km JPN7th Tokyo Shibamata 100 km 13:22:51 h1050
13.01 100km JPN4th Yakushima Ultramarathon 13:23:38 h47
2018
07.10 71.5km JPN26th Hasetsune Cup - Japan Mountain Endurance Race 21:10:38 h1280
22.09 129km JPN5th SkyView Ultra-Trail 120 - Yamada Noboru Memorial Cup 32:54:57 h368
17.06 100km JPN13. Okinoshima 100km Ultra Marathon 13:15:32 h219
19.05 106km JPN3rd Trainic World 100 km in Sai-No-Kuni 29:29:14 h257
12.05 108.7km JPN2nd Aso Round Trail 27:40:52 h316
2017
08.10 71.5km JPN25th Hasetsune Cup - Japan Mountain Endurance Race 19:56:21 h1325
20.08 97km JPN5th World Cultural Heritage "Fuji" Foot Race 13:42:00 h63
25.06 72.7km JPN4. Spatrail - Shima to Kusatsu 12:42:27 h648
04.06 100km JPN5th Tokyo Shibamata 100 km 10:54:58 h345
21.05 100km JPN23rd Yatsugatake Nobeyama 100 km 13:27:20 h695
23.04 118km JPN27th Fuji 5 Lakes 118 km Challenge 14:20:08 h344
04.03 204km JPN7th Little Edo Oedo 200k 32:50:15 h120
2016
11.12 71.7km JPN3rd Izu Trail Journey 13:29:55 h1038
11.09 129km JPN3rd SkyView Ultra-Trail 120 - Yamada Noboru Memorial Cup 34:45:35 h387
28.08 70km JPN3rd Tsukuba Renjyo 70 km Road & Trail Run 10:49:22 h157
16.07 65km JPN7th Nozawa Onsen 4100D Mountain Trail 13:07:42 h208
26.06 72.7km JPN3. Spatrail - Shima to Kusatsu 11:42:21 h320
12.06 45.4km JPN9th Skyline Trail Sugadaira 7:45:21 h205
05.06 100km JPN4th Tokyo Shibamata 100 km 12:08:29 h528
29.04 49km JPN9th Ishioka Trail Run 6:25:33 h87
2015
06.06 100km JPN3rd Tokyo Shibamata 100 km 12:27:09 h657
28.02 112km JPN5th Oedo Night run 112k 16:32:43 h42
11.01 100km JPN25th Miyako 100 km Ultramarathon 13:12:22 h361
2014
12.10 71.5km JPN22nd Hasetsune Cup - Japan Mountain Endurance Race 19:05:29 h1552
14.09 110km JPN6th Shinetsu Five Mountains Trail 110km 21:49:30 h506
20.07 65km JPN5th Nozawa Onsen 4100D Mountain Trail 13:34:04 h294
29.06 100km JPN29. Lake Saroma 100 km Ultramarathon 11:52:48 h773
01.06 100km JPN2nd Tokyo Shibamata 100 km 13:45:43 h525
12.01 100km JPN24th Miyako 100 km Ultramarathon 13:35:31 h341