Asuka (齋藤明日佳) Saito
Born : 1980 Cat. W45 Ultrarunner since 2010 JPN
39
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
1
Countries visited ?JPNJapan
9,3%
Rank quotient ?This runner's calculation uses 39 eligible race(s): Σ(rank − 1) = 3 841; Σ finishers = 41 242. 3 841 / 41 242 × 100 = 9.31%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed40
Km — ultra races3 061 km
> 100 km1
Longest race118,0 km

Km per year (ultra races)

2022
210
3 races
2023
200
3 races
2024
475
6 races
2025
165
3 races
2026

Race types (share of distance)

Road96,7%
Stage3,3%

Wins & podiums (ultra)

🏆 Win0
🏆 Win F5
🏅 Top 30
🏅 Top 3 F16
Longest winning streak0
Current streak0

HISTORY

39 race(s) · 2 stage(s) nested
DateRacePerf.Rk
2026
14.06 65km JPN5. OSJ Aizu Bandaisan Ultramarathon - 65 km 6:24:30 h9
04.04 50km JPN5th Ultra Udon Maranic 6:43:12 h13
24.01 50km JPN36th Miyako 50 km Ultramarathon 4:25:28 h15
2025
14.12 100km JPN6th Tobishima Ultra Marathon 10:50:20 h19
19.10 60km JPN31th River Shimanto 60km 5:19:53 h24
29.06 100km JPN40. Lake Saroma 100 km Ultramarathon 9:30:10 h197
15.06 50km JPN18. Okinoshima 50km Ultra Marathon 4:22:16 h11
20.04 65km JPN25. Okukumano 65 km Ultramarathon 6:00:32 h6
05–06.04 100km/2stages JPN4th Ultra Udon Maranic 11:30:43 h5
2024
22.09 50km JPN32. Akita Nairiku 50km Marathon 4:19:11 h28
30.06 100km JPN39. Lake Saroma 100 km Ultramarathon 9:27:51 h168
16.06 50km JPN17. Okinoshima 50km Ultra Marathon 4:32:22 h11
2023
17.12 50km JPN6th Okinawa 50km Ultramarathon 4:27:56 h13
25.06 100km JPN38. Lake Saroma 100 km Ultramarathon 9:22:48 h161
21.05 60km JPN11th Tokyo Shibamata 60 km 5:20:20 h26
2019
19.10 50km JPN4th Iki 50 km Ultra Marathon 4:22:27 h13
30.06 100km JPN34. Lake Saroma 100 km Ultramarathon 9:25:48 h212
09.06 71km JPN8th Hida Takayama 71 km Ultramarathon 6:50:59 h25
11.05 50km JPN1st Izu Oshima Geopark Ultra Marathon 4:26:59 h9
2018
24.06 100km JPN33. Lake Saroma 100 km Ultramarathon 8:54:05 h144
2017
25.06 100km JPN32. Lake Saroma 100 km Ultramarathon 9:01:47 h141
04.06 60km JPN5th Tokyo Shibamata 60 km 5:22:30 h28
23.04 71km JPN27th Fuji 5 Lakes 71 km Challenge 6:28:56 h17
2016
11.09 50km JPN1st Koyasan and Ryujin-Onsen 50 km Ultra Marathon 4:59:01 h35
26.06 100km JPN31. Lake Saroma 100 km Ultramarathon 8:59:01 h184
05.06 60km JPN4th Tokyo Shibamata 60 km 5:09:41 h22
24.04 71km JPN26th Fuji 5 Lakes 71 km Challenge 6:40:59 h26
2015
18.10 100km JPN21st River Shimanto 100km 10:20:04 h153
28.06 100km JPN30. Lake Saroma 100 km Ultramarathon 9:25:06 h273
06.06 60km JPN3rd Tokyo Shibamata 60 km 5:29:12 h57
19.04 118km JPN25th Fuji 5 Lakes 118 km Challenge 13:26:58 h186
29.03 100km JPN1st Osaka Yodogawa 100 km Ultra Marathon 10:22:22 h125
2014
19.10 100km JPN20th River Shimanto 100km 10:18:09 h150
21.09 50km JPN2nd 50 km Ultramarathon Hakusan-Shirakawago 4:53:02 h30
29.06 100km JPN29. Lake Saroma 100 km Ultramarathon 10:14:41 h281
2013
30.06 100km road race JPN28. Lake Saroma 100 km Ultramarathon 10:04:53 h349
2012
24.06 100km road race JPN27. Lake Saroma 100 km Ultramarathon 9:34:23 h238
2011
26.06 100km road race JPN26. Lake Saroma 100 km Ultramarathon 9:37:33 h225
2010
27.06 100km JPN25. Lake Saroma 100 km Ultramarathon 10:03:23 h251