Toshihiro (圷俊裕) Akutsu
ID 683136
Born : 1981 Cat. M45 Ultrarunner since 2015 JPN
22
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
33
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
58,5%
Rank quotient ?This runner's calculation uses 22 eligible race(s): Σ(rank − 1) = 13 834; Σ finishers = 23 656. 13 834 / 23 656 × 100 = 58.48%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed22
Km — ultra races1 571 km
Longest race100,0 km
41. Lake Saroma 100 km Ultramarathon — 28/6/2026

Km per year (ultra races)

62
1 race
2022
2023
2024
2025
100
1 race
2026

Race types (share of distance)

Road55,7%
Trail44,3%

Records

50 km7h47'47100 km11h42'56

HISTORY

22 race(s)
DateRacePerf.Rk
2026
28.06 100km JPN41. Lake Saroma 100 km Ultramarathon 12:34:07 h1933
2022
17.04 62km JPN32th Fuji 5 Lakes 62 km Challenge 7:36:27 h231
2019
03.11 50km JPN6th Nakanoto Treasure Trail Run Festival 7:49:32 h151
13.07 65km JPN10th Nozawa Onsen 4100D Mountain Trail 12:08:57 h176
30.06 100km JPN34. Lake Saroma 100 km Ultramarathon 12:23:25 h1573
21.04 71km JPN29th Fuji 5 Lakes 71 km Challenge 8:22:01 h162
2018
09.09 51.4km JPN8th Hakuba Int. Trail Run 9:05:29 h401
24.06 100km JPN33. Lake Saroma 100 km Ultramarathon 11:42:56 h1190
2017
05.11 50km JPN4th Nakanoto Treasure Trail Run Festival 7:47:47 h51
17.09 52km JPN9th Shinetsu Five Mountains Trail 110km 7:29:33 h331
10.09 51.4km JPN7th Hakuba Int. Trail Run 8:30:32 h474
25.06 100km JPN32. Lake Saroma 100 km Ultramarathon 12:09:42 h1337
23.04 71km JPN27th Fuji 5 Lakes 71 km Challenge 9:46:10 h555
2016
06.11 50km JPN3rd Nakanoto Treasure Trail Run Festival 8:02:05 h60
11.09 53km JPN6th Hakuba Int. Trail Run 9:17:01 h459
27.08 60km JPN19th Mt. Tateyama Climbathon 9:21:00 h110
26.06 100km JPN31. Lake Saroma 100 km Ultramarathon 11:44:48 h1349
2015
13.09 53km JPN5th Hakuba Int. Trail Run 8:37:27 h368
30.08 60km JPN18th Mt. Tateyama Climbathon 9:41:00 h133
18.07 100km JPN8th OSJ Ontake 100km Ultra Trail 17:06:47 h574
28.06 100km JPN30. Lake Saroma 100 km Ultramarathon 12:24:38 h1893
19.04 71km JPN25th Fuji 5 Lakes 71 km Challenge 9:15:04 h345