Osamu (下司修) Geji
Born : 1974 Cat. M50 Ultrarunner since 2023 JPN
28
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
19,5%
Rank quotient ?This runner's calculation uses 28 eligible race(s): Σ(rank − 1) = 2 051; Σ finishers = 10 537. 2 051 / 10 537 × 100 = 19.46%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed28
Km — ultra races2 770 km
> 100 km12
> 160 km7
> 200 km1
Longest race210,0 km

Km per year (ultra races)

2022
523
7 races
2023
1 105
11 races
2024
781
8 races
2025
361
2 races
2026

Race types (share of distance)

Road22,1%
Trail77,9%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 31
🏅 Top 3 M1
Longest winning streak0
Current streak0

HISTORY

28 race(s)
DateRacePerf.Rk
2026
16.05 100mi JPN11th Trainic World 100 Mile in Sai-No-Kuni 33:54:01 h51
14.03 200km JPN16th Little Edo Oedo 200k 28:55:59 h48
2025
28.12 130km JPN6th Kyoto Great Round 130 km 24:19:46 h15
14.12 70km JPN12th Izu Trail Journey 9:18:48 h114
13.09 162.2km JPN17th Shinetsu Five Mountains Trail 100 mile 27:05:12 h50
10.08 50km JPN4th Yacchiro Dragon Trail 8:38:43 h13
19.07 210km JPN3rd Round of the Boso Peninsula 210K 36:23:23 h3 🥉
06.07 55km JPN2nd Tsurugi Foothills Trail Du Kamiichi 7:26:23 h34
01.06 54km JPN3rd Around Toki River 9:45:24 h54
15.03 50km JPN11th Mt. Hiei Int. 50 km Trail Run 7:42:53 h48
2024
15.12 50km JPN9th Minami-aso caldera Trail 6:47:17 h6
08.12 70km JPN11th Izu Trail Journey 8:59:42 h110
16.11 167km JPN3rd Kumagawa Revival Trail 33:15:44 h16
19.10 100km JPN7th Iki 100 km Ultra Marathon 10:10:47 h30
14.09 163.1km JPN16th Shinetsu Five Mountains Trail 100 mile 29:04:12 h276
11.08 50km JPN3rd Yacchiro Dragon Trail 9:59:23 h38
06.07 50km JPN8th Minami-aso caldera Trail Summer 7:54:41 h19
01.06 64km JPN7th Mizukami Mountain Party 10:24:32 h18
11.05 115.1km JPN2nd Aso Volcano Trail 18:27:30 h48
26.04 167km JPN9th Ultra-Trail Mt. Fuji 31:15:21 h140
23.03 109km JPN2nd Hiroshima Wangan Trail Run 20:27:37 h62
2023
10.12 70km JPN10th Izu Trail Journey 10:07:15 h297
04.11 103km JPN17th Nagasaki Tachibana Gulf Coast Super Maranic 103 13:27:47 h16
17.09 110km JPN15th Shinetsu Five Mountains Trail 110km 19:51:26 h98
11.08 64km JPN2nd Yacchiro Dragon Trail 13:22:00 h31
23.07 66km JPN11th Kirishima Ebino-kougen Extreme Trail 10:15:00 h85
28.05 60km JPN8th Akiyoshidai Karst Trail Run 7:49:13 h51
13.05 50km JPN9th Mt. Hiei Int. 50 km Trail Run 9:37:07 h308