Tomoko (坂本智子) Sakamoto
ID 347726
Born : 1983 Cat. W40 Ultrarunner since 2012 JPN
23
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
1
Countries visited ?JPNJapan
27,8%
Rank quotient ?This runner's calculation uses 23 eligible race(s): Σ(rank − 1) = 2 158; Σ finishers = 7 766. 2 158 / 7 766 × 100 = 27.79%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed23
Km — ultra races2 748 km
> 100 km12
> 160 km3
> 24h7
Longest race193,5 km
18. Green Charity Marathon Tokyo - Hard Run 24H — 1/6/2019

Km per year (ultra races)

218
2 races
2022
365
3 races
2023
347
3 races
2024
353
3 races
2025
120
1 race
2026

Race types (share of distance)

Road100,0%

Wins & podiums (ultra)

🏆 Win0
🏆 Win F1
🏅 Top 30
🏅 Top 3 F5
Longest winning streak0
Current streak0

Records

100 km9h09'406 h57,09 km12 h80,85 km24 h193,50 km

HISTORY

23 race(s) · 4 split(s) nested
DateRacePerf.Rk
2026
19.04 120km JPN36th Fuji 5 Lakes Sparta Challenge 13:56:38 h178
2025
12.10 24h JPN3rd Aizu Yanaizu Akabeko Marathon - 24h 93.975 km17
28.09 100km JPN33. Akita Nairiku 100km Marathon 11:36:25 h135
24.05 24h JPN4th Hirosaki 24h Ultra Run 158.709 km36
2024
22.09 100km JPN32. Akita Nairiku 100km Marathon 9:28:10 h25
21.05 24h JPN3rd Hirosaki 24h Ultra Run 128.541 km67
21.04 118km JPN34th Fuji 5 Lakes 118 km Challenge 13:51:40 h174
2023
24.09 100km JPN31. Akita Nairiku 100km Marathon 9:09:40 h29
16.04 118km JPN33th Fuji 5 Lakes 118 km Challenge 13:20:40 h116
11.03 24h JPN15th Jingu Gaien 24 Hour Challenge 147.430 km65
2022
25.09 100km JPN30. Akita Nairiku 100km Marathon 9:17:16 h24
17.04 118km JPN32th Fuji 5 Lakes 118 km Challenge 11:25:10 h23
2019
15.12 100km JPN4th Okinawa 100km Ultramarathon 9:26:52 h32
01.06 24h JPN18. Green Charity Marathon Tokyo - Hard Run 24H 193.500 km6
21.04 118km JPN29th Fuji 5 Lakes 118 km Challenge 11:46:40 h47
2018
23.09 100km JPN28. Akita Nairiku 100km Marathon 10:26:46 h71
22.04 118km JPN28th Fuji 5 Lakes 118 km Challenge 13:21:26 h129
2017
02.07 100km JPN1st Nikko 100km Ultramarathon 12:46:50 h527
2014
08.11 24h JPN9th Jingu Gaien 24 Hour Challenge 190.518 km30
21.06 24h JPN13. Tokyo Challenge 24 hours 187.420 km9
2013
22.09 100km JPN23. Akita Nairiku 100km Marathon 12:24:17 h393
15.06 12h JPN12. Tokyo Challenge 12 hours 80.850 km21
2012
01.09 6h JPN15. Hiratsuka 6 hour race 57.090 km27