Gen (渡辺剛玄) Watanabe
ID 425812
Ultrarunner since 2013 JPN
35
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
60
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
30,2%
Rank quotient ?This runner's calculation uses 35 eligible race(s): Σ(rank − 1) = 2 011; Σ finishers = 6 661. 2 011 / 6 661 × 100 = 30.19%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed44
Km — ultra races4 609 km
> 100 km26
> 160 km1
> 200 km1
Longest race259,0 km
21st River Road Foot Race 259km — 3/5/2026

Km per year (ultra races)

412
3 races
2022
583
4 races
2023
1 113
8 races
2024
800
7 races
2025
653
3 races
2026

Race types (share of distance)

Road76,2%
Stage23,8%

Records

100 km10h28'04100 mi25h07'49

HISTORY

38 race(s) · 12 stage(s) nested
DateRacePerf.Rk
2026
03.05 259km JPN21st River Road Foot Race 259km 2d 00:54:58 h19
28.03 160km JPN1st Shinkun Iga-goe Route Journey Run 27:11:51 h61
14.03 84km JPN14th Arakawa Riverside Journey - Stage 1 11:18:16 h61
28.02–01.03 150km/2stages JPN3rd Modern Japanese Silk Road Journey Run 20:05:25 h19
2025
01–02.11 130km/2stages JPN3rd Mito Kaido Journey run 17:39:52 h21
04.10 151km JPN2nd Noto Country Journey Run 22:32:00 h35
22.08 101km JPN12th World Cultural Heritage "Fuji" Foot Race 14:46:11 h103
12.04 71km JPN20th Toda Saiko 70 km 7:32:47 h101
29–30.03 149km/2stages JPN2nd Modern Japanese Silk Road Journey Run 19:18:04 h19
15–16.03 136km/2stages JPN13th Arakawa Riverside Journey Stage Race 17:09:40 h13
26.01 62km JPN3. Minuma Challenge 60 7:46:59 h39
2024
16.11 130km JPN2nd Mito Kaido Journey run 17:07:47 h4
02.11 142km JPN6th Autumn leaves in Okumusashi / Chichibu Journey run 19:00:29 h9
05.10 151km JPN1st Noto Country Journey Run 21:10:10 h15
14.09 122km JPN7th Utsukushima Fukushima Journey Run 122K 15:36:12 h5
23.08 101km JPN11th World Cultural Heritage "Fuji" Foot Race 13:31:40 h45
08.06 159km JPN5th Nikko Sennin Concentric Highway Journey Run 25:07:49 h17
06.04 160km JPN3rd Yagurazawa Round Trip Pre-Tournament 30:54:49 h75
30–31.03 148km/2stages JPN1st Modern Japanese Silk Road Journey Run 20:25:15 h10
2023
18.11 130km JPN1st Mito Kaido Journey run 18:06:52 h16
28.10 147km JPN5th Autumn leaves in Okumusashi / Chichibu Journey run 24:56:34 h128
16.09 123km JPN6th Utsukushima Fukushima Journey Run 123K 16:56:43 h5
18.08 101km JPN10th World Cultural Heritage "Fuji" Foot Race 14:12:14 h53
18.03 82km JPN11th Arakawa Riverside Journey Stage Race - Stage 1 10:51:44 h41
2022
03.09 121km JPN2nd Tone River Run Up Journey Run Upstream 17:06:46 h5
02.04 155km JPN2nd Tone River Run Up Journey Run Downstream 22:01:00 h13
21–22.03 136km/2stages JPN10th Arakawa Riverside Journey Stage Race 17:28:00 h28
2021
09.10 155km JPN1st Tone River Run Up Journey Run Downstream 24:00:00 h23
03.04 80km JPN9th Arakawa Riverside Journey Stage Race - Stage 1 9:38:00 h13
2020
24.10 146km JPN2nd Autumn leaves in Okumusashi / Chichibu Journey run 21:56:26 h88
19.09 123km JPN3rd Utsukushima Fukushima Journey Run 123K 17:43:46 h52
22.08 63.7km JPN1st Toda Aya Lake Ultra Marathon 6:43:59 h22
2018
12.05 100km JPN3rd Tamagawa Ultra Marathon - 100 km 10:28:04 h5
2017
08.04 70km JPN12th Toda Saiko 70 km 6:34:00 h89
2016
09.04 70km JPN11th Toda Saiko 70 km 6:16:43 h25
2015
11.04 70km JPN10th Toda Saiko 70 km 6:40:30 h72
2014
12.04 70km JPN9th Toda Saiko 70 km 7:07:13 h107
2013
01.06 100km JPN1st Tokyo Shibamata 100 km 12:47:10 h705