Cishi (笹川慈視) Sasagawa
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10
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
25
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
70,3%
Rank quotient ?This runner's calculation uses 10 eligible race(s): Σ(rank − 1) = 3 838; Σ finishers = 5 459. 3 838 / 5 459 × 100 = 70.31%. A win adds 0 to the numerator. Lower is better.
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail100,0%
Records
HISTORY
10 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 02.11 | 100km | 19:26:18 h | 69 | |
| 20.07 | 99.5km | 18:40:48 h | 816 | |
| 2020 | ||||
| 08.02 | 50km | 7:03:06 h | 60 | |
| 2019 | ||||
| 13.07 | 100km | 17:42:38 h | 654 | |
| 2017 | ||||
| 15.07 | 100km | 16:55:06 h | 624 | |
| 2015 | ||||
| 18.10 | 73km | 12:51:14 h | 270 | |
| 18.07 | 100km | 14:25:03 h | 254 | |
| 2014 | ||||
| 19.10 | 73km | 13:27:13 h | 272 | |
| 2013 | ||||
| 20.10 | 71km | 14:05:43 h | 301 | |
| 13.07 | 100km | 16:54:29 h | 528 | |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 2/11/2025 | 5th OSJ Kami 100 | 100,00 | ×4 |
| ✓ 2 | 13/7/2019 | 12th OSJ Ontake 100km Ultra Trail | 100,00 | ×4 |
| ✓ 3 | 15/7/2017 | 10th OSJ Ontake 100km Ultra Trail | 100,00 | ×4 |
| ✓ 4 | 18/7/2015 | 8th OSJ Ontake 100km Ultra Trail | 100,00 | ×4 |
| ✓ 5 | 13/7/2013 | 6th OSJ Ontake 100km Ultra Trail | 100,00 | ×4 |
| ✓ 6 | 20/7/2025 | 17th OSJ Ontake 100km Ultra Trail | 99,50 | ×3 |
| ✓ 7 | 18/10/2015 | 6th OSJ Hyonosen Mountains Trail Race | 73,00 | ×2 |
| ✓ 8 | 19/10/2014 | 5th OSJ Hyonosen Mountains Trail Race | 73,00 | ×2 |
| ✓ 9 | 20/10/2013 | 4th OSJ Hyonosen Mountains Trail Race | 71,00 | ×2 |
| ✓ 10 | 8/2/2020 | 11th OSJ Jungle Trail 50K Amami | 50,00 | ×2 |