Kokuni (佐藤高国) Sato
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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.
28
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
55,6%
Rank quotient ?This runner's calculation uses 10 eligible race(s): Σ(rank − 1) = 1 380; Σ finishers = 2 481. 1 380 / 2 481 × 100 = 55.62%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed10
Km — ultra races902 km
Longest race100,0 km
17th 100 km Ultra Maranic Osaka — 19/4/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
HISTORY
10 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 19.04 | 100km | 14:02:41 h | 218 | |
| 2024 | ||||
| 21.04 | 100km | 12:12:40 h | 111 | |
| 2022 | ||||
| 17.04 | 100km | 12:48:38 h | 68 | |
| 2020 | ||||
| 19.01 | 50km | 5:32:58 h | 44 | |
| 2019 | ||||
| 29.09 | 88km | 11:53:39 h | 62 | |
| 2017 | ||||
| 24.09 | 88km | 11:58:44 h | 90 | |
| 23.04 | 100km | 12:27:35 h | 161 | |
| 2016 | ||||
| 25.09 | 88km | 13:46:49 h | 173 | |
| 24.04 | 100km | 13:45:46 h | 320 | |
| 2015 | ||||
| 27.09 | 88km | 13:00:55 h | 143 | |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 19/4/2026 | 17th 100 km Ultra Maranic Osaka | 100,00 | ×3 |
| ✓ 2 | 21/4/2024 | 15th 100 km Ultra Maranic Osaka | 100,00 | ×3 |
| ✓ 3 | 17/4/2022 | 13th 100 km Ultra Maranic Osaka | 100,00 | ×3 |
| ✓ 4 | 23/4/2017 | 9th 100 km Ultra Maranic Osaka | 100,00 | ×3 |
| ✓ 5 | 24/4/2016 | 8th 100 km Ultra Maranic Osaka | 100,00 | ×3 |
| ✓ 6 | 29/9/2019 | 22th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |
| ✓ 7 | 24/9/2017 | 20th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |
| ✓ 8 | 25/9/2016 | 19th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |
| ✓ 9 | 27/9/2015 | 18th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |
| ✓ 10 | 19/1/2020 | 30th Miyako 50 km Ultramarathon | 50,00 | ×1 |