Koji (関口公司) Sekiguchi
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Born : 1961
Cat. M65 Ultrarunner since 2013
7
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
22
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 ?Japan
Japan54,9%
Rank quotient ?This runner's calculation uses 7 eligible race(s): Σ(rank − 1) = 721; Σ finishers = 1 313. 721 / 1 313 × 100 = 54.91%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed7
Km — ultra races524 km
> 24h1
Longest race100,0 km
19th Muraoka 100 km Ultra Marathon — 25/9/2016
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road48,4%
Trail51,6%
HISTORY
7 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 05.04 | 80km | 7th Flash Trail Challenge 80km |
19:46:38 h | 79 |
| 22.02 | 72km | 3rd Daimonji 100 - 72km |
18:56:38 h | 25 |
| 2023 | ||||
| 27.05 | 24h | 5th Forest of Fagus 24-hour Endurance Trail Running Race |
68.400 km | 5 |
| 09.04 | 50km | 5th Onigajo Peaks Trail |
11:44:45 h | 122 |
| 2016 | ||||
| 25.09 | 100km | 19th Muraoka 100 km Ultra Marathon |
13:20:25 h | 278 |
| 2014 | ||||
| 28.09 | 88km | 17th Muraoka 88 km Ultra Marathon |
12:45:33 h | 124 |
| 2013 | ||||
| 29.09 | 66km | 16th Muraoka 66 km Ultra Marathon |
8:29:43 h | 95 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 25/9/2016 | 19th Muraoka 100 km Ultra Marathon | 100,00 | ×4 |
| ✓ 2 | 28/9/2014 | 17th Muraoka 88 km Ultra Marathon | 88,00 | ×4 |
| ✓ 3 | 5/4/2025 | 7th Flash Trail Challenge 80km | 80,00 | ×3 |
| ✓ 4 | 22/2/2025 | 3rd Daimonji 100 - 72km | 72,00 | ×3 |
| ✓ 5 | 27/5/2023 | 5th Forest of Fagus 24-hour Endurance Trail Running Race | 68,40 | ×3 |
| ✓ 6 | 29/9/2013 | 16th Muraoka 66 km Ultra Marathon | 66,00 | ×3 |
| ✓ 7 | 9/4/2023 | 5th Onigajo Peaks Trail | 50,00 | ×2 |