Koichi (丸山浩一) Maruyama
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14
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
30
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
71,0%
Rank quotient ?This runner's calculation uses 14 eligible race(s): Σ(rank − 1) = 7 181; Σ finishers = 10 111. 7 181 / 10 111 × 100 = 71.02%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed14
Km — ultra races1 118 km
> 100 km1
Longest race110,0 km
2nd Kyoto Ultra Walking 110km — 25/11/2023
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road90,2%
Ult.Walk9,8%
Records
HISTORY
14 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 25/11/2023 | 2nd Kyoto Ultra Walking 110km | 110,00 | ×3 |
| ✓ 2 | 10/6/2018 | 7th Hida Takayama 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 3 | 11/6/2017 | 6th Hida Takayama 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 4 | 16/10/2016 | 5th Noto Peninsula 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 5 | 12/6/2016 | 5th Hida Takayama 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 6 | 7/6/2015 | 4th Hida Takayama 72 km Ultramarathon | 72,00 | ×2 |
| ✓ 7 | 8/6/2014 | 3rd Hida Takayama 72 km Ultramarathon | 72,00 | ×2 |
| ✓ 8 | 14/6/2026 | 14th Hida Takayama 71 km Ultramarathon | 71,00 | ×2 |
| ✓ 9 | 8/6/2025 | 13th Hida Takayama 71 km Ultramarathon | 71,00 | ×2 |
| ✓ 10 | 9/6/2024 | 12th Hida Takayama 71 km Ultramarathon | 71,00 | ×2 |
| ✓ 11 | 11/6/2023 | 11th Hida Takayama 71 km Ultramarathon | 71,00 | ×2 |
| ✓ 12 | 20/10/2019 | 8th Noto Peninsula 60 km Ultra Marathon | 60,00 | ×2 |
| ✓ 13 | 21/10/2018 | 7th Noto Peninsula 60 km Ultra Marathon | 60,00 | ×2 |
| ✓ 14 | 20/10/2013 | 2nd Noto Peninsula 60 km Ultra Marathon | 60,00 | ×2 |