Kazuya (市坪和也) Ichitsubo
ID 478602
Born : 1983 Cat. M40 Ultrarunner since 2013 JPN
30
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
52
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 ?JPNJapanTPETaiwan
5,2%
Rank quotient ?This runner's calculation uses 30 eligible race(s): Σ(rank − 1) = 970; Σ finishers = 18 666. 970 / 18 666 × 100 = 5.20%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed30
Km — ultra races3 753 km
> 100 km12
> 160 km8
> 200 km2
> 24h9
Longest race218,3 km
13th Jingu Gaien 24 Hour Challenge — 10/11/2018

Km per year (ultra races)

2022
563
4 races
2023
294
3 races
2024
404
3 races
2025
182
1 race
2026

Race types (share of distance)

Road100,0%

Wins & podiums (ultra)

🏆 Win1
🏆 Win M1
🏅 Top 36
🏅 Top 3 M6
Longest winning streak1
Current streak0

Records

100 km7h33'2312 h109,11 km24 h218,26 km

HISTORY

30 race(s) · 8 split(s) nested
DateRacePerf.Rk
2026
28.03 24h JPN17th Jingu Gaien 24 Hour Challenge 181.934 km23
2025
28.09 64km JPN28th Muraoka 64 km Ultra Marathon 5:33:25 h38
20.09 24h JPN25th 24-hour relay & solo marathon Kobe 179.850 km7
08.03 24h JPN16th Jingu Gaien 24 Hour Challenge 159.998 km48
2024
29.09 88km JPN27th Muraoka 88 km Ultra Marathon 10:12:55 h14
30.06 100km JPN39. Lake Saroma 100 km Ultramarathon 10:53:26 h535
23.02 12h TPE13th Taipei 12hr Ultra Marathon Night Run 105.895 km11
2023
24.09 88km JPN26th Muraoka 88 km Ultra Marathon 8:32:57 h3 🥉
19.08 24h JPN23th 24-hour relay & solo marathon Kobe 181.900 km8
10.06 12h JPN1st Aizu Yanaizu Akabeko Marathon - 12h 109.110 km7
11.03 24h JPN15th Jingu Gaien 24 Hour Challenge 184.253 km39
2019
03.08 24h JPN19th 24-hour relay & solo marathon Kobe 171.700 km8
2018
16.12 100km JPN3rd Okinawa 100km Ultramarathon 8:36:04 h8
10.11 24h JPN13th Jingu Gaien 24 Hour Challenge 218.258 km15
04.08 24h JPN18th 24-hour relay & solo marathon Kobe 205.700 km3 🥉
24.06 100km JPN33. Lake Saroma 100 km Ultramarathon 8:12:17 h59
2017
17.12 100km JPN2nd Okinawa 100km Ultramarathon 8:12:37 h4
11.11 24h JPN12th Jingu Gaien 24 Hour Challenge 194.050 km41
15.10 100km JPN23rd River Shimanto 100km 7:33:23 h7
24.09 120km JPN20th Muraoka 120 km Ultra Marathon 10:16:54 h2 🥈
25.06 100km JPN32. Lake Saroma 100 km Ultramarathon 7:58:20 h36
2016
18.12 100km JPN1st Okinawa 100km Ultramarathon 8:31:00 h2 🥈
16.10 100km JPN22nd River Shimanto 100km 7:52:14 h10
25.09 100km JPN19th Muraoka 100 km Ultra Marathon 8:26:23 h1 🏆
2015
18.10 100km JPN21st River Shimanto 100km 7:37:12 h4
06.06 100km JPN25th Aso Caldera Super Marathon 100 km 7:53:34 h6
29.03 100km JPN1st Osaka Yodogawa 100 km Ultra Marathon 7:43:12 h5
2014
19.10 100km JPN20th River Shimanto 100km 8:40:07 h27
07.06 100km JPN24th Aso Caldera Super Marathon 100 km 7:44:44 h3 🥉
2013
20.10 100km JPN19th River Shimanto 100km 8:33:45 h26