Naoki (鈴木直樹) Suzuki
ID 439387
Born : 1965 Cat. M60 Ultrarunner since 2010 JPN
38
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
63
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
45,6%
Rank quotient ?This runner's calculation uses 38 eligible race(s): Σ(rank − 1) = 11 596; Σ finishers = 25 415. 11 596 / 25 415 × 100 = 45.63%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed40
Km — ultra races4 962 km
> 100 km12
> 160 km4
> 200 km4
Longest race520,0 km
13th River Road Foot Race 520 km — 30/4/2017

Km per year (ultra races)

2022
466
2 races
2023
159
1 race
2024
130
1 race
2025
138
1 race
2026

Race types (share of distance)

Road77,1%
Trail17,5%
Stage5,4%

Records

50 km8h57'25100 km10h53'17100 mi35h11'32

HISTORY

38 race(s) · 4 stage(s) nested
DateRacePerf.Rk
2026
14–15.03 138km/2stages JPN14th Arakawa Riverside Journey 22:45:00 h66
2025
01–02.11 130km/2stages JPN3rd Mito Kaido Journey run 24:21:21 h86
2024
08.06 159km JPN5th Nikko Sennin Concentric Highway Journey Run 35:11:32 h93
2023
29.04 395km JPN2nd Reiheishi Michi Kyoto to Nikko - 395 km 7d 00:58:50 h8
08.04 71km JPN18th Toda Saiko 70 km 8:51:40 h192
2020
20.09 127km JPN3rd Utsukushima Fukushima Journey Run 127K 21:46:03 h86
2019
13.07 100km JPN12th OSJ Ontake 100km Ultra Trail 16:48:37 h544
30.04 514km JPN15th River Road Foot Race 514 km 5d 06:14:17 h58
13.04 70km JPN14th Toda Saiko 70 km 7:08:55 h159
2018
16.12 68km JPNCoast to Coast 70k Trail Run 10:17:48 h262
03.06 78km JPN25. Ultramarathon Okumusashi 10:08:57 h746
20.05 100km JPN24th Yatsugatake Nobeyama 100 km 13:10:18 h815
22.04 100km JPN28th Fuji 5 Lakes 100 km Challenge 13:54:09 h1205
03.03 113km JPN8th Oedo Night run 113k 18:43:16 h102
2017
10.09 50km JPN9th Shinshu-Togakushi Trail Run Race 8:57:25 h141
15.07 100km JPN10th OSJ Ontake 100km Ultra Trail 15:16:30 h378
30.04 520km JPN13th River Road Foot Race 520 km 5d 07:07:31 h49
08.04 70km JPN12th Toda Saiko 70 km 7:33:49 h266
26.03 100km JPN13th Izu Oshima Ultra 100 km 11:46:45 h34
2016
05.06 78km JPN23. Ultramarathon Okumusashi 8:40:55 h415
28.05 50km JPN2nd Mt. Hiei Int. 50 km Trail Run 9:26:54 h519
22.05 100km JPN22nd Yatsugatake Nobeyama 100 km 12:12:15 h408
24.04 118km JPN26th Fuji 5 Lakes 118 km Challenge 13:11:00 h192
2015
23.08 97km JPN3rd World Cultural Heritage "Fuji" Foot Race 12:43:00 h22
18.07 100km JPN8th OSJ Ontake 100km Ultra Trail 15:29:36 h367
22.06 77km JPN22. Ultramarathon Okumusashi 8:41:26 h420
30.04 265km JPN11th River Road Foot Race 265 km 2d 07:23:18 h8
11.04 70km JPN10th Toda Saiko 70 km 7:15:28 h148
2014
14.09 142km JPN17th Karisakatoge beyond Chichibu Run 20:53:54 h53
27.07 77km JPN21. Ultramarathon Okumusashi 10:27:43 h585
08.06 100km JPN10th Iwate Ginga 100km Marathon Challenge 11:43:36 h342
18.05 100km JPN20th Yatsugatake Nobeyama 100 km 13:16:12 h706
20.04 108km JPN24th Fuji 5 Lakes 108 km Challenge 11:39:30 h107
2013
28.07 77km JPN20. Ultramarathon Okumusashi 9:40:48 h621
13.07 100km JPN6th OSJ Ontake 100km Ultra Trail 14:48:04 h266
19.05 100km JPN19th Yatsugatake Nobeyama 100 km 13:17:42 h704
2012
06.10 100km JPN9th Echigo Kubikino 100km Ultramarathon 10:53:17 h211
2010
09.10 100km JPN8th Echigo Kubikino 100km Ultramarathon 11:06:03 h250