Takeshi (保坂武) Hosaka
Born : 1982 Cat. M40 Ultrarunner since 2014 JPN
23
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
37
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
14,3%
Rank quotient ?This runner's calculation uses 24 eligible race(s): Σ(rank − 1) = 1 888; Σ finishers = 13 241. 1 888 / 13 241 × 100 = 14.26%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed24
Km — ultra races1 971 km
> 100 km1
Longest race111,0 km

Km per year (ultra races)

2022
75
1 race
2023
448
6 races
2024
155
2 races
2025
286
3 races
2026

Race types (share of distance)

Road75,5%
Trail24,5%

Wins & podiums (ultra)

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

Records

HISTORY

24 race(s)
DateRacePerf.Rk
2026
05.07 75km JPN4th Mt. Gassan Foot Ultra Marathon 8:10:04 h28
14.06 100km JPN20th Iwate Ginga 100km Marathon Challenge 10:26:31 h117
19.04 111km JPN7th Yamadera Zao 111 km Ultra Marathon 12:48:38 h12
2025
08.06 100km JPN19th Iwate Ginga 100km Marathon Challenge 9:35:52 h59
30.03 55km JPN7th Ishinomaki Tozan Marathon 55km 6:18:49 h4
2024
27.10 74.8km JPN3rd Shiroishi Minami Zao Ultra Excursion 74.8km 7:44:59 h2 🥈
07.09 53.4km JPN17th OSJ Adatara Trail 50K 12:33:07 h115
07.07 75km JPN2nd Mt. Gassan Foot Ultra Marathon 7:46:59 h11
09.06 100km JPN18th Iwate Ginga 100km Marathon Challenge 9:34:50 h56
21.04 100km JPN5th Yamadera Zao 100 km Ultra Marathon 10:37:49 h11
24.03 45km JPN6th Ishinomaki Tozan Marathon 45km 5:05:28 h37
2023
09.07 75km JPN1st Mt. Gassan Foot Ultra Marathon 8:40:04 h23
2019
19.10 51.4km JPN10th Inagawa 100km Ultra-Marathon 4:18:56 h9
15.06 55km JPN2nd Yuzawa Sky Extreme Trail 8:21:46 h16
19.05 100km JPN25th Yatsugatake Nobeyama 100 km 10:49:12 h157
2018
20.10 100km JPN9th Inagawa 100km Ultra-Marathon 10:05:22 h3 🥉
01.09 115k JPN2nd Miyagi Yumeguri Ultra Marathon - 115 km 12:54:54 h5
20.05 100km JPN24th Yatsugatake Nobeyama 100 km 11:12:20 h222
2017
02.07 100km JPN1st Nikko 100km Ultramarathon 10:17:41 h90
21.05 100km JPN23rd Yatsugatake Nobeyama 100 km 11:54:38 h259
2016
15.10 100km JPN7th Inagawa 100km Ultra-Marathon 10:58:35 h6
22.05 100km JPN22nd Yatsugatake Nobeyama 100 km 12:21:46 h458
2015
14.06 100km JPN11th Iwate Ginga 100km Marathon Challenge 9:40:56 h71
2014
08.06 100km JPN10th Iwate Ginga 100km Marathon Challenge 10:25:23 h141