Tatsuya (河合竜弥) Kawai
ID 324405
Born : 1976 Cat. M50 Ultrarunner since 2012 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
2
Countries visited ?JPNJapanUSAUnited States
64,2%
Rank quotient ?This runner's calculation uses 44 eligible race(s): Σ(rank − 1) = 4 033; Σ finishers = 6 283. 4 033 / 6 283 × 100 = 64.19%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed44
Km — ultra races3 530 km
> 100 km5
> 160 km5
Longest race160,9 km
1st Bay Area 100 — 13/6/2026

Km per year (ultra races)

230
3 races
2022
100
1 race
2023
522
6 races
2024
341
4 races
2025
341
3 races
2026

Race types (share of distance)

Road2,8%
Trail97,2%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 32
🏅 Top 3 M2
Longest winning streak0
Current streak0

Records

50 km6h30'12100 km13h23'2950 mi11h06'28100 mi29h12'59

HISTORY

44 race(s)
DateRacePerf.Rk
2026
13.06 100mi USA1st Bay Area 100 32:39:10 h94
09.05 100km USA43rd Quicksilver 100 km Endurance Run 16:51:19 h174
14.03 50mi USA14th Marin Ultra Challenge 50 Mile Race 13:43:51 h164
2025
06.06 100mi USA12th Scout Mountain 100 Mile Ultra Trail 35:00:03 h38
10.05 50km USA42nd Quicksilver 50 km Endurance Run 7:02:56 h55
08.03 50mi USA13th Marin Ultra Challenge 50 Mile Race 11:56:38 h81
22.02 50km USA14th Montara Mountain 50 km Trail Run 7:27:25 h30
2024
08.11 100mi USA2nd Mamba 100 Miles 29:12:59 h51
12.10 50km USA3rd Mt. Umunhum Trail Conquest - Fall 6:39:14 h3 🥉
10.08 50km USA15th Redwood Summer Trail Run 6:45:09 h12
11.05 50km USA41th Quicksilver 50 km Endurance Run 8:05:07 h105
26.04 100mi USA11th The Canyons Endurance 100 Miles Run 33:01:57 h150
13.04 50km USA9th Woodside Purisima Creek Crossover 7:14:25 h25
2023
21.10 100km USA3rd Lake Sonoma 100K & 50K 17:31:26 h202
2022
07.05 100km USA25th Miwok 100k Trail Race 14:15:21 h133
12.03 50mi USA10th Marin Ultra Challenge 50 Mile Race 11:06:28 h46
13.02 50km USA11th Montara Mountain 50 km Trail Run 6:49:20 h17
2021
23.10 100km USA38th Quicksilver 100 km Endurance Run 14:47:35 h84
14.08 100km USA11th Cool Moon 100 km Endurance Run 18:56:54 h3 🥉
10.07 50km USA11th Golden Gate 50 km Summer Trail Run 6:30:12 h32
19.06 50km USA12th San Lorenzo River Trail Run 6:35:01 h33
2020
22.02 52km USA3rd Mount Umunhum Trail Run 7:00:51 h41
19.01 50km USA10th Crystal Springs 50 km Winter Trail Run 6:44:17 h24
2019
21.12 50km USA8th Woodside Ramble 50K - Winter 6:43:32 h67
14.09 100km USA6th Tahoe 100k Endurance Run 17:46:22 h51
25.08 50km USA10th Diablo 50 km Trail Run 9:03:34 h28
10.08 50km USA10th Redwood Summer Trail Run 6:50:37 h20
10.08 50km USA10th Redwood 50 km Summer Trail Run 6:50:37 h20
13.07 50km USA9th Golden Gate 50 km Summer Trail Run 6:59:22 h28
11.05 50km USA36th Quicksilver 50 km Endurance Run 7:14:38 h48
09.03 50mi USA6th Antelope Canyon 50 Mile Race 14:45:03 h241
2017
07.04 100km USA6th The Zion 100 km Run 19:19:58 h97
11.03 50mi USA6th Marin Ultra Challenge 50 Mile Race 12:03:17 h75
25.02 50km USA7th Steep Ravine 50 km Trail Run 7:18:11 h6
18.02 50km USA7th Montara Mountain 50 km Trail Run 6:57:37 h12
2016
14.05 100km USA33rd Quicksilver 100 km Endurance Run 15:14:41 h113
09.04 50km USA2nd Woodside Purisima Creek Crossover 6:51:07 h34
2015
10.07 100mi USA5th Santa Barbara 100 Mile Endurance Race 35:34:15 h24
2014
11.10 50km USA7th Peacock Challenge 50k 7:42:00 h7
19.07 100km JPN7th OSJ Ontake 100km Ultra Trail 15:16:12 h354
27.04 100km JPN16. Okukumano 100 km Ultramarathon 13:23:29 h157
2013
13.07 100km JPN6th OSJ Ontake 100km Ultra Trail 17:09:58 h546
2012
28.10 71km JPN3rd OSJ Hyonosen Mountains Trail Race 13:39:28 h133
15.07 100km JPN5th OSJ Ontake 100km Ultra Trail 15:02:36 h419