Natsuki (森夏樹) Mori
Born : 1978 Cat. M45 Ultrarunner since 2008 JPN
50
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
55
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
33,2%
Rank quotient ?This runner's calculation uses 61 eligible race(s): Σ(rank − 1) = 10 139; Σ finishers = 30 558. 10 139 / 30 558 × 100 = 33.18%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed65
Km — ultra races5 401 km
> 100 km22
> 160 km4
Longest race167,0 km

Km per year (ultra races)

637
6 races
2022
830
9 races
2023
650
7 races
2024
438
5 races
2025
447
5 races
2026

Race types (share of distance)

Road32,4%
Trail57,5%
Stage10,1%

Wins & podiums (ultra)

🏆 Win4
🏆 Win M4
🏅 Top 35
🏅 Top 3 M5
Longest winning streak1
Current streak0

HISTORY

61 race(s) · 8 stage(s) nested
DateRacePerf.Rk
2026
14.06 54km JPN4th Around Toki River 8:06:37 h12
06.06 159km JPN7th Nikko Sennin Concentric Highway Journey Run 17:51:45 h1 🏆
10.05 51km JPN7th FunTrails Round Minano 6:12:32 h5
26.04 45km JPN19th Ishioka Trail Run 4:06:18 h4
14–15.03 138km/2stages JPN14th Arakawa Riverside Journey 12:20:03 h1 🏆
2025
05.10 51.4km JPN13th Trainic world Ogose-Tokigawa Trail Run 50km 6:43:46 h13
22.08 101km JPN12th World Cultural Heritage "Fuji" Foot Race 11:09:26 h12
17.05 100km JPN10th Trainic World 100 km in Sai-No-Kuni 22:28:56 h33
27.04 50km JPN18th Ishioka Trail Run 5:00:30 h5
15–16.03 136km/2stages JPN13th Arakawa Riverside Journey Stage Race 12:50:30 h1 🏆
2024
06.10 51.4km JPN12th Trainic world Ogose-Tokigawa Trail Run 50km 6:54:38 h9
23.08 101km JPN11th World Cultural Heritage "Fuji" Foot Race 12:29:49 h22
08.06 100.8km JPN4th Okushinano 100 12:41:44 h28
12.05 51km JPN5th FunTrails Round Minano 6:16:32 h8
28.04 50km JPN17th Ishioka Trail Run 5:22:42 h6
06.04 160km JPN3rd Yagurazawa Round Trip Pre-Tournament 21:24:48 h4
16–17.03 136km/2stages JPN12th Arakawa Riverside Journey Stage Race 12:52:24 h1 🏆
2023
10.12 70km JPN10th Izu Trail Journey 9:01:25 h115
28.10 147km JPN5th Autumn leaves in Okumusashi / Chichibu Journey run 16:23:19 h2 🥈
01.10 52km JPN10th Trainic world Soto-Chichibu Trail Run 50km 7:05:41 h4
18.08 101km JPN10th World Cultural Heritage "Fuji" Foot Race 12:56:13 h30
17.06 105km JPN1st Okumusashi Long Trail Race 105K 23:11:59 h18
14.05 51km JPN4th FunTrails Round Minano 8:31:24 h159
29.04 50km JPN16th Ishioka Trail Run 5:24:07 h9
16.04 118km JPN33th Fuji 5 Lakes 118 km Challenge 13:17:07 h109
18–19.03 136km/2stages JPN11th Arakawa Riverside Journey Stage Race 15:08:36 h4
2022
30.10 49.6km JPN10th Trainic world Ogose-Tokigawa Trail Run 50km 7:15:29 h33
17.09 162.6km JPN14th Shinetsu Five Mountains Trail 100 mile 28:01:06 h46
16.07 106.5km JPN14th OSJ Ontake 100km Ultra Trail 14:12:00 h211
26.06 51km JPN3rd FunTrails Round Minano 8:12:20 h48
22.04 167km JPN7th Ultra-Trail Mt. Fuji 37:29:11 h764
13.03 100km JPN4th Ibaraki 100k Ultra Marathon 13:39:23 h263
2019
03.11 50km JPN3rd Koshu Alps Lily Route Challenge 10:25:44 h74
14.09 100mi JPN11th Shinetsu Five Mountains Trail 100 mile 31:50:21 h222
02.06 78km JPN26. Ultramarathon Okumusashi 9:10:41 h566
11.05 106km JPN4th Trainic World 100 km in Sai-No-Kuni 25:37:15 h88
28.04 49km JPN12th Ishioka Trail Run 5:41:45 h49
2018
07.10 71.5km JPN26th Hasetsune Cup - Japan Mountain Endurance Race 18:28:17 h819
08.09 49.8km JPN6th Trainic world Soto-Chichibu Trail Run 50km 8:43:10 h93
03.06 78km JPN25. Ultramarathon Okumusashi 8:48:46 h308
29.04 46km JPN11th Ishioka Trail Run 6:27:18 h33
2017
09.07 49.8km JPN5th Trainic world Chichibu Trail Run 50km 9:16:23 h77
08.04 70km JPN12th Toda Saiko 70 km 8:53:56 h588
2016
09.10 71.5km JPN24th Hasetsune Cup - Japan Mountain Endurance Race 13:37:11 h392
11.09 129km JPN3rd SkyView Ultra-Trail 120 - Yamada Noboru Memorial Cup 30:34:03 h206
05.06 78km JPN23. Ultramarathon Okumusashi 9:44:31 h758
29.04 49km JPN9th Ishioka Trail Run 6:28:37 h89
2015
31.10 71.5km JPN23rd Hasetsune Cup - Japan Mountain Endurance Race 13:38:14 h617
30.08 70km JPN2nd Tsukuba Renjyo 70 km Road & Trail Run 10:24:14 h156
28.06 72.7km JPN2. Spatrail - Shima to Kusatsu 10:41:52 h153
2014
08.06 100km JPN10th Iwate Ginga 100km Marathon Challenge 10:36:30 h169
25.04 100mi JPN3rd Ultra-Trail Mt. Fuji 42:50:29 h529
12.04 70km JPN9th Toda Saiko 70 km 7:41:32 h200
2013
10.03 72km JPN1st Izu Trail Journey 9:53:45 h188
2012
05.08 77km JPN19. Ultramarathon Okumusashi 8:53:03 h286
03.06 50km JPN4th OSJ Okukuji Trail 50k 10:53:22 h117
18.05 156km JPN1st Ultra-Trail Mount Fuji 40:50:53 h296
22.04 112km JPN22nd Fuji 5 Lakes 112 km Challenge 14:27:56 h473
2011
17.07 100km JPN4th OSJ Ontake 100km Ultra Trail 13:24:28 h77
05.06 50km JPN3rd OSJ Okukuji Trail 50k 11:38:23 h229
2008
14.09 100km JPN8th Tango 100 km Ultramarathon 13:21:00 h368