Ryuta (難波竜太) Namba
ID 366457
Born : 1967 Cat. M55 Ultrarunner since 2009 JPN
26
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
36
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
13,8%
Rank quotient ?This runner's calculation uses 26 eligible race(s): Σ(rank − 1) = 1 723; Σ finishers = 12 472. 1 723 / 12 472 × 100 = 13.81%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed27
Km — ultra races2 074 km
> 100 km1
Longest race130,0 km
3rd Mito Kaido Journey run — 1/11/2025

Km per year (ultra races)

140
2 races
2022
135
2 races
2023
71
1 race
2024
201
2 races
2025
70
1 race
2026

Race types (share of distance)

Road76,9%
Trail16,9%
Stage6,3%

Records

100 km9h40'00

HISTORY

26 race(s) · 2 stage(s) nested
DateRacePerf.Rk
2026
11.04 8h JPN21st Toda Saiko 8 Hours 70.000 km46
2025
01–02.11 130km/2stages JPN3rd Mito Kaido Journey run 15:51:56 h8
12.04 71km JPN20th Toda Saiko 70 km 6:21:46 h23
2024
13.04 71km JPN19th Toda Saiko 70 km 6:35:55 h23
2023
01.07 8h JPN29th 8-Hour Endurance Race Tokorozawa 63.700 km45
08.04 71km JPN18th Toda Saiko 70 km 6:47:17 h39
2022
03.07 8h JPN28th 8-Hour Endurance Race Tokorozawa 68.600 km57
09.04 71km JPN17th Toda Saiko 70 km 6:31:51 h17
2021
24.01 60km JPN3rd HAT Kobe Ultra Marathon 5:02:09 h4
2019
29.06 8h JPN25th 8-Hour Endurance Race Tokorozawa 83.300 km26
02.06 78km JPN26. Ultramarathon Okumusashi 7:52:14 h203
2018
03.06 100km JPN6th Tokyo Shibamata 100 km 10:15:29 h126
14.04 70km JPN13th Toda Saiko 70 km 6:44:45 h103
2017
04.06 100km JPN5th Tokyo Shibamata 100 km 9:49:07 h162
2016
05.06 100km JPN4th Tokyo Shibamata 100 km 10:59:35 h274
2015
07.06 72km JPN4th Hida Takayama 72 km Ultramarathon 6:27:55 h20
03.05 70km JPN23. Mukogawa Yurikamome Ultra Marathon 6:03:22 h37
2014
08.06 72km JPN3rd Hida Takayama 72 km Ultramarathon 6:54:06 h21
2013
09.06 72km JPN2nd Hida Takayama 72 km Ultramarathon 6:47:41 h11
2012
20.05 100km JPN4th 100 km Ultra Maranic Osaka 9:48:15 h24
03.05 70km JPN20. Mukogawa Yurikamome Ultra Marathon 5:58:38 h32
2011
22.05 100km JPN3rd 100 km Ultra Maranic Osaka 9:40:00 h26
03.05 70km JPN19. Mukogawa Yurikamome Ultra Marathon 6:10:07 h60
2010
19.09 100km JPN10th Tango 100 km Ultramarathon 11:29:53 h171
03.05 70km JPN18. Mukogawa Yurikamome Ultra Marathon 6:48:54 h57
2009
03.05 70km JPN17. Mukogawa Yurikamome Ultra Marathon 7:40:45 h134