Toru (山崎亨) Yamazaki
ID 829490
Born : 1975 Cat. M50 Ultrarunner since 2016 JPN
45
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
59
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 ?ITAItalyJPNJapan
28,6%
Rank quotient ?This runner's calculation uses 45 eligible race(s): Σ(rank − 1) = 7 198; Σ finishers = 25 143. 7 198 / 25 143 × 100 = 28.63%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed48
Km — ultra races5 036 km
> 100 km21
> 160 km11
> 200 km2
> 24h2
> 48h2
Longest race368,8 km
7th Last Samurai Standing Backyard Ultra - Kijimadaira — 3/4/2026

Km per year (ultra races)

615
6 races
2022
645
6 races
2023
427
4 races
2024
763
7 races
2025
711
3 races
2026

Race types (share of distance)

Road11,8%
Trail70,5%
Stage5,6%
Elim.12,1%

Records

50 km5h59'05100 km12h15'07100 mi22h56'36Backyard55 loops

HISTORY

46 race(s) · 4 stage(s) nested
DateRacePerf.Rk
2026
06.06 100.8km JPN6th Okushinano 100 19:50:57 h476
03.04 Backyard Ultra JPN7th Last Samurai Standing Backyard Ultra - Kijimadaira 368.830 km (55h)13
21.02 Backyard Ultra JPN7th Last Samurai Standing Backyard Ultra - Kanagawa 241.416 km6
2025
15.11 100mi JPN11th FunTrails100M Round 31:21:35 h21
02.11 50km JPN1st Jyoetsumyoko Express Trail 5:59:05 h9
05.10 51.4km JPN13th Trainic world Ogose-Tokigawa Trail Run 50km 7:44:08 h41
05.07 100km JPN3rd Shiga Kogen 100 16:53:55 h29
07.06 100.8km JPN5th Okushinano 100 20:12:18 h462
05–06.04 100km/2stages JPN4th Ultra Udon Maranic 15:38:12 h83
15.03 200km JPN15th Little Edo Oedo 200k 29:33:09 h37
2024
22.12 67km JPN2nd Coast to Coast Boso hanto 9:02:50 h43
06.10 51.4km JPN12th Trainic world Ogose-Tokigawa Trail Run 50km 8:02:10 h48
26.08 148km ITA14ème Sur les Traces des Ducs de Savoie 36:26:23 h476
18.05 100mi JPN9th Trainic World 100 Mile in Sai-No-Kuni 33:36:51 h47
2023
10.12 70km JPN10th Izu Trail Journey 9:16:08 h156
26.11 52km JPN9th Kumano Old Trails 7:31:41 h24
15.07 100mi JPN15th OSJ Ontake 100 Mile Ultra Trail 22:56:36 h30
10.06 100.8km JPN3rd Okushinano 100 19:13:23 h424
20.05 100mi JPN8th Trainic World 100 Mile in Sai-No-Kuni 33:22:10 h64
04–05.03 100km/2stages JPN2nd Ultra Udon Maranic 14:41:24 h68
2022
11.12 70km JPN9th Izu Trail Journey 8:55:24 h112
24.09 107km JPN1st Hiroshima Wangan Trail Run 21:38:04 h74
16.07 106.5km JPN14th OSJ Ontake 100km Ultra Trail 12:14:16 h46
11.06 100.8km JPN2nd Okushinano 100 19:33:44 h386
21.05 100mi JPN7th Trainic World 100 Mile in Sai-No-Kuni 33:47:53 h67
10.04 70km JPN7th Okumikawa Power Trail 10:38:47 h61
2021
12.12 69.1km JPN8th Izu Trail Journey 8:59:14 h151
09.10 168.5km JPN7th OSJ Koumi 100 30:14:18 h64
28.08 75km JPN1st Okushinano 100 - 75 km 11:39:00 h68
2020
13.12 66km JPN7th Izu Trail Journey 9:02:37 h204
10.10 100mi JPN6th OSJ Koumi 100 34:32:41 h79
2019
14.09 100mi JPN11th Shinetsu Five Mountains Trail 100 mile 29:32:54 h126
23.06 72.6km JPN6. Spatrail - Shima to Kusatsu 72K 9:38:41 h63
02.06 78km JPN26. Ultramarathon Okumusashi 7:56:39 h212
16.03 80km JPN7th Arakawa Riverside Journey Stage Race - Stage 1 10:21:02 h71
2018
17.11 106km JPN4th FunTrails100K Round 23:29:06 h100
07.10 71.5km JPN26th Hasetsune Cup - Japan Mountain Endurance Race 13:51:59 h240
16.09 110km JPN10th Shinetsu Five Mountains Trail 110km 18:13:03 h90
24.06 72.7km JPN5. Spatrail - Shima to Kusatsu 10:26:51 h96
20.05 100km JPN24th Yatsugatake Nobeyama 100 km 12:38:08 h564
22.04 70km JPN4th Okumikawa Power Trail 12:38:07 h196
2017
08.10 71.5km JPN25th Hasetsune Cup - Japan Mountain Endurance Race 14:03:39 h424
10.09 51.4km JPN7th Hakuba Int. Trail Run 7:11:37 h207
25.06 72.7km JPN4. Spatrail - Shima to Kusatsu 11:02:26 h265
23.04 118km JPN27th Fuji 5 Lakes 118 km Challenge 13:53:49 h233
2016
05.06 100km JPN4th Tokyo Shibamata 100 km 12:15:07 h558