Masako (山口雅子) Yamaguchi
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12
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
27
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
46,2%
Rank quotient ?This runner's calculation uses 12 eligible race(s): Σ(rank − 1) = 2 187; Σ finishers = 4 737. 2 187 / 4 737 × 100 = 46.17%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed12
Km — ultra races885 km
Longest race100,0 km
23rd Ebisu-Daikoku 100 km Marathon — 29/5/2016
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
HISTORY
12 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 30.05 | 72km | 9:31:44 h | 49 | |
| 2024 | ||||
| 29.09 | 64km | 10:24:30 h | 238 | |
| 2022 | ||||
| 29.09 | 45km | 5:58:49 h | 573 | |
| 2019 | ||||
| 29.09 | 88km | 12:25:23 h | 84 | |
| 2017 | ||||
| 24.09 | 88km | 11:25:53 h | 60 | |
| 2016 | ||||
| 25.09 | 88km | 12:34:14 h | 81 | |
| 29.05 | 100km | 12:54:48 h | 270 | |
| 2015 | ||||
| 27.09 | 66km | 8:27:05 h | 61 | |
| 2014 | ||||
| 28.09 | 66km | 8:26:31 h | 73 | |
| 2013 | ||||
| 29.09 | 66km | 8:48:08 h | 129 | |
| 2012 | ||||
| 04.05 | 70km | 9:53:31 h | 156 | |
| 2011 | ||||
| 30.04 | 72km | 10:10:38 h | 425 | |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 29/5/2016 | 23rd Ebisu-Daikoku 100 km Marathon | 100,00 | ×3 |
| ✓ 2 | 29/9/2019 | 22th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |
| ✓ 3 | 24/9/2017 | 20th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |
| ✓ 4 | 25/9/2016 | 19th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |
| ✓ 5 | 30/5/2026 | 10th Yokosuka Miura 72km Michikusa Ultra Marathon | 72,00 | ×2 |
| ✓ 6 | 30/4/2011 | 21st Fuji 5 Lakes 72 km Challenge | 72,00 | ×2 |
| ✓ 7 | 4/5/2012 | 24. Yamaguchi 100 Hagi-O-Kan Maranic 70 km | 70,00 | ×2 |
| ✓ 8 | 27/9/2015 | 18th Muraoka 66 km Ultra Marathon | 66,00 | ×2 |
| ✓ 9 | 28/9/2014 | 17th Muraoka 66 km Ultra Marathon | 66,00 | ×2 |
| ✓ 10 | 29/9/2013 | 16th Muraoka 66 km Ultra Marathon | 66,00 | ×2 |
| ✓ 11 | 29/9/2024 | 27th Muraoka 64 km Ultra Marathon | 64,00 | ×2 |
| ✓ 12 | 29/9/2022 | 25th Muraoka 45 km Ultra Marathon | 45,00 | ×1 |