Toshikazu Hosaka
ID 122275
Born : 1977 Cat. M45 Ultrarunner since 2008 USA
40
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
48
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
7,5%
Rank quotient ?This runner's calculation uses 40 eligible race(s): Σ(rank − 1) = 554; Σ finishers = 7 429. 554 / 7 429 × 100 = 7.46%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed40
Km — ultra races3 046 km
> 100 km5
> 160 km5
Longest race160,9 km
13th Plain 100 Mile Endurance Run — 13/9/2014

Km per year (ultra races)

2022
2023
2024
100
1 race
2025
2026

Race types (share of distance)

Road11,8%
Trail88,2%

Wins & podiums (ultra)

🏆 Win2
🏆 Win M2
🏅 Top 38
🏅 Top 3 M8
Longest winning streak1
Current streak0

Records

50 km3h31'45100 km8h38'3450 mi6h31'31100 mi20h53'21

HISTORY

40 race(s) · 1 split(s) nested
DateRacePerf.Rk
2025
10.05 100km USA42nd Quicksilver 100 km Endurance Run 12:52:10 h19
2015
28.03 40mi USA20th The Barkley Marathons 40 Mile 24:47:59 h6
2014
11.10 50mi USA2nd Euchre Bar Massacre 25:11:00 h1 🏆
13.09 100mi USA13th Plain 100 Mile Endurance Run 27:05:00 h4
18.05 50km USA27th Ohlone 50K Wilderness Run 5:57:36 h28
17.05 50mi USA29th Silver State 50 Mile 9:00:35 h10
2013
30.11 28mi USA29th Quad Dipsea Trail Run 4:51:20 h10
06.09 100mi USA34th Wasatch Front 100 Mile 28:34:21 h51
19.05 50km USA26th Ohlone 50K Wilderness Run 6:04:11 h21
18.05 50mi USA28th Silver State 50 Mile 8:45:30 h17
26.04 100mi JPN2nd Ultra-Trail Mount Fuji 32:30:16 h161
02.02 50mi USA2nd Ray Miller 50 Mile Trail Race 8:13:49 h7
2012
24.11 28mi USA28th Quad Dipsea Trail Run 4:48:58 h5
13.10 50mi USA30th Dick Collins Firetrails 50 Mile 7:31:40 h8
25.08 31.5mi USA13th Tamalpa Headlands 50K 4:30:59 h9
21.07 100mi USA25th Angeles Crest 100 Mile 22:38:02 h6
20.05 50km USA25th Ohlone 50K Wilderness Run 5:56:38 h18
19.05 50mi USA27th Silver State 50 Mile 8:28:01 h5
12.05 50km USA29th Quicksilver 50 km Endurance Run 4:13:43 h2 🥈
28.04 50mi USA20th Leona Divide 50 Mile Run 7:44:37 h19
21.04 100km USA26th Ruth Anderson Ultra 100km 8:38:34 h2 🥈
07.04 50mi USA33rd American River 50 Mile Endurance Run 6:59:14 h17
17.03 50km USA20th Chuckanut 50K 4:46:30 h58
04.02 50km USA34th Jed Smith Ultra Classic - 50 km Race 3:31:45 h3 🥉
2011
26.11 28mi USA27th Quad Dipsea Trail Run 4:32:32 h7
08.10 50mi USA29th Dick Collins Firetrails 50 Mile 7:28:22 h5
10.09 100mi USA11th Rio Del Lago 100 Mile 20:53:21 h3 🥉
07.08 50km USA30th Skyline 50k Endurance Run 4:01:23 h6
21.05 50mi USA26th Silver State 50 Mile 8:44:17 h6
30.04 50km USA28th Quicksilver 50 km Endurance Run 4:00:03 h4
23.04 50mi USA25th Ruth Anderson Ultra 50mi 6:31:31 h1 🏆
09.04 50mi USA32nd American River 50 Mile Endurance Run 7:01:23 h18
12.03 50km USA22nd Way Too Cool 50K Endurance Run 3:59:52 h15
2010
27.11 28mi USA26th Quad Dipsea Trail Run 4:45:48 h9
09.10 50mi USA28th Dick Collins Firetrails 50 Mile 7:36:59 h12
01.08 50km USA29th Skyline 50k Endurance Run 4:05:19 h6
08.05 50km USA27th Quicksilver 50 km Endurance Run 4:10:58 h6
17.04 50km USA24th Ruth Anderson Ultra 50km 3:33:49 h2 🥈
20.02 50km USA2nd Saratoga FA50 4:46:02 h2 🥈
2008
10.05 50km USA25th Quicksilver 50 km Endurance Run 4:27:49 h5