Riwa (生方理和) Ubukata
ID 180234
Born : 1959 Cat. W65 Ultrarunner since 2007 JPN
43
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
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
45,9%
Rank quotient ?This runner's calculation uses 43 eligible race(s): Σ(rank − 1) = 10 335; Σ finishers = 22 517. 10 335 / 22 517 × 100 = 45.90%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed43
Km — ultra races3 381 km
> 100 km6
Longest race123,0 km
6th Utsukushima Fukushima Journey Run 123K — 16/9/2023

Km per year (ultra races)

49
1 race
2022
303
4 races
2023
263
3 races
2024
263
3 races
2025
60
1 race
2026

Race types (share of distance)

Road100,0%

Wins & podiums (ultra)

🏆 Win0
🏆 Win F1
🏅 Top 30
🏅 Top 3 F5
Longest winning streak0
Current streak0

Records

50 km5h49'38100 km11h26'52

HISTORY

43 race(s)
DateRacePerf.Rk
2026
11.04 8h JPN21st Toda Saiko 8 Hours 60.000 km76
2025
19.10 70km JPN32. Ultramarathon Okumusashi 9:47:07 h375
14.09 122km JPN8th Utsukushima Fukushima Journey Run 122K 23:22:30 h58
12.04 71km JPN20th Toda Saiko 70 km 8:30:05 h175
2024
20.10 70km JPN31. Ultramarathon Okumusashi 9:52:43 h508
14.09 122km JPN7th Utsukushima Fukushima Journey Run 122K 22:24:00 h31
13.04 71km JPN19th Toda Saiko 70 km 8:49:54 h147
2023
16.09 123km JPN6th Utsukushima Fukushima Journey Run 123K 23:22:40 h30
01.07 8h JPN29th 8-Hour Endurance Race Tokorozawa 58.800 km69
08.04 71km JPN18th Toda Saiko 70 km 8:27:27 h159
22.01 50km JPN33th Miyako 50 km Ultramarathon 5:49:38 h30
2022
03.07 8h JPN28th 8-Hour Endurance Race Tokorozawa 49.000 km176
2021
04.07 8h JPN27th 8-Hour Endurance Race Tokorozawa 63.700 km208
2020
22.08 63.7km JPN1st Toda Aya Lake Ultra Marathon 7:56:15 h54
2019
29.06 8h JPN25th 8-Hour Endurance Race Tokorozawa 68.600 km109
2018
30.06 8h JPN24th 8-Hour Endurance Race Tokorozawa 63.700 km51
2017
01.07 8h JPN23rd 8-Hour Endurance Race Tokorozawa 61.674 km105
04.06 78km JPN24. Ultramarathon Okumusashi 11:06:18 h1249
23.04 100km JPN27th Fuji 5 Lakes 100 km Challenge 13:54:48 h1261
2016
02.07 8h JPN22nd 8-Hour Endurance Race Tokorozawa 58.428 km81
05.06 78km JPN23. Ultramarathon Okumusashi 9:52:54 h828
2015
12.07 8h JPN21st 8-Hour Endurance Race Tokorozawa 69.153 km34
22.06 77km JPN22. Ultramarathon Okumusashi 8:41:03 h418
2014
06.07 8h JPN20th 8-Hour Endurance Race Tokorozawa 68.166 km85
20.04 108km JPN24th Fuji 5 Lakes 108 km Challenge 13:57:16 h489
2013
28.07 77km JPN20. Ultramarathon Okumusashi 9:05:20 h455
07.07 8h JPN19th 8-Hour Endurance Race Tokorozawa 68.166 km19
2012
05.08 77km JPN19. Ultramarathon Okumusashi 9:18:32 h383
08.07 8h JPN18th 8-Hour Endurance Race Tokorozawa 74.658 km38
22.04 112km JPN22nd Fuji 5 Lakes 112 km Challenge 14:13:49 h396
2011
07.08 77km JPN18. Ultramarathon Okumusashi 8:29:06 h245
10.07 8h JPN17th 8-Hour Endurance Race Tokorozawa 71.412 km17
30.04 112km JPN21st Fuji 5 Lakes 112 km Challenge 14:27:56 h410
2010
01.08 77km JPN17. Ultramarathon Okumusashi 9:01:43 h276
04.07 8h JPN16th 8-Hour Endurance Race Tokorozawa 68.166 km26
25.04 100km JPN20th Fuji 5 Lakes 100 km Challenge 11:26:52 h199
2009
02.08 75km JPN16. Ultramarathon Okumusashi 7:54:30 h206
05.07 8h JPN15th 8-Hour Endurance Race Tokorozawa 74.658 km23
26.04 100km JPN19th Fuji 5 Lakes 100 km Challenge 12:12:39 h223
2008
03.08 75km JPN15. Ultramarathon Okumusashi 8:21:02 h200
06.07 8h JPN14th 8-Hour Endurance Race Tokorozawa 71.412 km25
2007
05.08 75km JPN14. Ultramarathon Okumusashi 8:37:37 h201
28.04 100km JPN17th Fuji 5 Lakes 100 km Challenge 12:47:01 h230