Kazuo (松永和大) Matsunaga
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Born : 1979
Cat. M45 Ultrarunner since 2017
9
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
Japan62,1%
Rank quotient ?This runner's calculation uses 9 eligible race(s): Σ(rank − 1) = 3 512; Σ finishers = 5 653. 3 512 / 5 653 × 100 = 62.13%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed9
Km — ultra races900 km
Longest race100,0 km
8th Okinawa 100km Ultramarathon — 21/12/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
HISTORY
9 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 21.12 | 100km | 8th Okinawa 100km Ultramarathon |
12:04:29 h | 241 |
| 18.10 | 100km | 8th Iki 100 km Ultra Marathon |
11:51:25 h | 130 |
| 2024 | ||||
| 19.10 | 100km | 7th Iki 100 km Ultra Marathon |
12:24:42 h | 119 |
| 2023 | ||||
| 21.10 | 100km | 6th Iki 100 km Ultra Marathon |
12:59:26 h | 208 |
| 2019 | ||||
| 19.10 | 100km | 4th Iki 100 km Ultra Marathon |
11:35:37 h | 79 |
| 09.06 | 100km | 8th Hida Takayama 100 km Ultramarathon |
13:32:17 h | 1494 |
| 2018 | ||||
| 20.10 | 100km | 3rd Iki 100 km Ultra Marathon |
11:48:03 h | 104 |
| 2017 | ||||
| 21.10 | 100km | 2nd Iki 100 km Ultra Marathon |
12:50:54 h | 136 |
| 23.04 | 100km | 27th Fuji 5 Lakes 100 km Challenge |
13:25:51 h | 1010 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 21/12/2025 | 8th Okinawa 100km Ultramarathon | 100,00 | ×3 |
| ✓ 2 | 18/10/2025 | 8th Iki 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 3 | 19/10/2024 | 7th Iki 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 4 | 21/10/2023 | 6th Iki 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 5 | 19/10/2019 | 4th Iki 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 6 | 9/6/2019 | 8th Hida Takayama 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 7 | 20/10/2018 | 3rd Iki 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 8 | 21/10/2017 | 2nd Iki 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 9 | 23/4/2017 | 27th Fuji 5 Lakes 100 km Challenge | 100,00 | ×3 |