Akira (齋藤明) Saito
ID 1303463
Born : 1974 Cat. M50 Ultrarunner since 2019 JPN
23
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
42
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
22,2%
Rank quotient ?This runner's calculation uses 23 eligible race(s): Σ(rank − 1) = 3 141; Σ finishers = 14 134. 3 141 / 14 134 × 100 = 22.22%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed23
Km — ultra races2 276 km
> 100 km4
> 160 km2
> 24h2
Longest race170,0 km
16th Jingu Gaien 24 Hour Challenge — 8/3/2025

Km per year (ultra races)

530
6 races
2022
200
2 races
2023
280
3 races
2024
370
3 races
2025
482
4 races
2026

Race types (share of distance)

Road97,7%
Trail2,3%

Wins & podiums (ultra)

🏆 Win1
🏆 Win M1
🏅 Top 31
🏅 Top 3 M1
Longest winning streak1
Current streak0

Records

100 km8h11'2050 mi6h55'1024 h170,02 km

HISTORY

23 race(s) · 2 split(s) nested
DateRacePerf.Rk
2026
28.06 100km JPN41. Lake Saroma 100 km Ultramarathon 11:07:30 h991
14.06 100km JPN5. OSJ Aizu Bandaisan Ultramarathon - 100 km 11:38:39 h49
19.04 120km JPN36th Fuji 5 Lakes Sparta Challenge 14:16:07 h214
28.03 24h JPN17th Jingu Gaien 24 Hour Challenge 162.204 km43
2025
29.06 100km JPN40. Lake Saroma 100 km Ultramarathon 9:17:05 h156
07.06 100km JPN4. OSJ Aizu Bandaisan Ultramarathon - 100 km 10:15:46 h31
08.03 24h JPN16th Jingu Gaien 24 Hour Challenge 170.019 km42
2024
30.06 100km JPN39. Lake Saroma 100 km Ultramarathon 9:27:18 h166
15.06 100km JPN3. OSJ Aizu Bandaisan Ultramarathon - 100 km 11:15:41 h31
14.04 80km JPN9th Tamagawa Ultra Marathon - 80 km 8:19:10 h5
2023
15.10 100km JPN29th River Shimanto 100km 12:14:27 h435
25.06 100km JPN38. Lake Saroma 100 km Ultramarathon 10:28:58 h420
2022
18.12 100km JPN5th Okinawa 100km Ultramarathon 10:19:19 h59
04.09 53.4km JPN15th OSJ Adatara Trail 50K 10:38:57 h93
03.07 8h JPN28th 8-Hour Endurance Race Tokorozawa 58.800 km106
05.06 100km JPN1. OSJ Aizu Bandaisan Ultramarathon - 100 km 9:26:14 h20
22.05 100km JPN10th Tokyo Shibamata 100 km 9:45:19 h78
17.04 118km JPN32th Fuji 5 Lakes 118 km Challenge 12:02:29 h50
2021
05.12 100km JPN1st Tokyo Edogawa Ultra Marathon - 100 km 8:11:20 h8
09.10 100km JPN9th Tokyo Shibamata 100 km 9:08:52 h22
25.04 80km JPN6th Tokyo Ultra Marathon - 80 km 6:55:10 h1 🏆
2019
29.06 8h JPN25th 8-Hour Endurance Race Tokorozawa 73.500 km46
19.05 60km JPN7th Tokyo Shibamata 60 km 6:05:20 h98