Takenori (枡田武則) Masuda
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18
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 ?
Japan
60,5%
Rank quotient ?This runner's calculation uses 18 eligible race(s): Σ(rank − 1) = 3 998; Σ finishers = 6 607. 3 998 / 6 607 × 100 = 60.51%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed18
Km — ultra races1 423 km
Longest race100,0 km
28th Muraoka 100 km Ultra Marathon — 28/9/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road91,8%
Trail8,2%
Records
HISTORY
18 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 28/9/2025 | 28th Muraoka 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 2 | 20/4/2025 | 16th 100 km Ultra Maranic Osaka | 100,00 | ×3 |
| ✓ 3 | 21/4/2024 | 15th 100 km Ultra Maranic Osaka | 100,00 | ×3 |
| ✓ 4 | 23/4/2023 | 14th 100 km Ultra Maranic Osaka | 100,00 | ×3 |
| ✓ 5 | 22/4/2018 | 10th 100 km Ultra Maranic Osaka | 100,00 | ×3 |
| ✓ 6 | 23/4/2017 | 9th 100 km Ultra Maranic Osaka | 100,00 | ×3 |
| ✓ 7 | 20/9/2015 | 15th Tango 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 8 | 25/9/2016 | 19th Muraoka 88 km Ultra Marathon | 88,00 | ×2 |
| ✓ 9 | 27/9/2015 | 18th Muraoka 88 km Ultra Marathon | 88,00 | ×2 |
| ✓ 10 | 17/4/2022 | 13th 70 km Ultra Maranic Osaka | 70,00 | ×2 |
| ✓ 11 | 21/4/2019 | 11th 70 km Ultra Maranic Osaka | 70,00 | ×2 |
| ✓ 12 | 24/4/2016 | 8th 70 km Ultra Maranic Osaka | 70,00 | ×2 |
| ✓ 13 | 18/7/2021 | 1st Yamaguchi Hagi Return | 65,00 | ×1 |
| ✓ 14 | 13/6/2026 | 12th Fairy Trail - Super Long | 60,00 | ×1 |
| ✓ 15 | 21/3/2021 | 24th Mt. Rocco Cannonball Run - 56 km Speed | 56,00 | ×1 |
| ✓ 16 | 18/10/2020 | 23th Mt. Rocco Cannonball Run - 56 km Speed | 56,00 | ×1 |
| ✓ 17 | 4/4/2026 | 5th Ultra Udon Maranic | 50,00 | ×1 |
| ✓ 18 | 5/4/2024 | 3rd Ultra Udon Maranic | 50,00 | ×1 |