Keiko (竜子啓子) Ryuko
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Born : 1956
Cat. W70 Ultrarunner since 2008
6
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
Japan71,8%
Rank quotient ?This runner's calculation uses 6 eligible race(s): Σ(rank − 1) = 2 392; Σ finishers = 3 331. 2 392 / 3 331 × 100 = 71.81%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed6
Km — ultra races550 km
Longest race100,0 km
22nd Ebisu-Daikoku 100 km Marathon — 31/5/2015
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road81,8%
Trail18,2%
Records
HISTORY
6 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2019 | ||||
| 19.10 | 50km | 4th Iki 50 km Ultra Marathon |
5:40:46 h | 53 |
| 2015 | ||||
| 31.05 | 100km | 22nd Ebisu-Daikoku 100 km Marathon |
13:47:02 h | 366 |
| 2012 | ||||
| 21.10 | 100km | 18th River Shimanto 100km |
13:20:03 h | 760 |
| 2010 | ||||
| 27.06 | 100km | 10th Nichinan Orochi 100 km Marathon |
13:04:07 h | 260 |
| 2009 | ||||
| 20.09 | 100km | 9th Tango 100 km Ultramarathon |
13:48:52 h | 678 |
| 2008 | ||||
| 14.09 | 100km | 8th Tango 100 km Ultramarathon |
12:49:31 h | 281 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 31/5/2015 | 22nd Ebisu-Daikoku 100 km Marathon | 100,00 | ×4 |
| ✓ 2 | 21/10/2012 | 18th River Shimanto 100km | 100,00 | ×4 |
| ✓ 3 | 27/6/2010 | 10th Nichinan Orochi 100 km Marathon | 100,00 | ×4 |
| ✓ 4 | 20/9/2009 | 9th Tango 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 5 | 14/9/2008 | 8th Tango 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 6 | 19/10/2019 | 4th Iki 50 km Ultra Marathon | 50,00 | ×2 |