Masaki (伊澤正樹) Izawa
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Born : 1976
Cat. M50 Ultrarunner since 2015
6
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
16
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
Japan61,5%
Rank quotient ?This runner's calculation uses 6 eligible race(s): Σ(rank − 1) = 1 770; Σ finishers = 2 879. 1 770 / 2 879 × 100 = 61.48%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed6
Km — ultra races322 km
Longest race78,0 km
23. Ultramarathon Okumusashi — 5/6/2016
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road24,3%
Trail75,7%
Records
HISTORY
6 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2024 | ||||
| 16.11 | 50km | 10th FunTrails50K Round |
10:18:06 h | 285 |
| 2018 | ||||
| 08.07 | 49.6km | 7th Trainic world Ogose-Tokigawa Trail Run 50km |
7:57:12 h | 80 |
| 02.06 | 50km | 10th OSJ Okukuji Trail 50k |
12:46:00 h | 170 |
| 29.04 | 46km | 11th Ishioka Trail Run |
6:45:21 h | 53 |
| 2016 | ||||
| 05.06 | 78km | 23. Ultramarathon Okumusashi |
10:40:38 h | 1103 |
| 2015 | ||||
| 30.08 | 48km | 2nd Tsukuba Renjyo 48 km Road & Trail Run |
6:16:37 h | 85 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 5/6/2016 | 23. Ultramarathon Okumusashi | 78,00 | ×4 |
| ✓ 2 | 16/11/2024 | 10th FunTrails50K Round | 50,00 | ×3 |
| ✓ 3 | 2/6/2018 | 10th OSJ Okukuji Trail 50k | 50,00 | ×3 |
| ✓ 4 | 8/7/2018 | 7th Trainic world Ogose-Tokigawa Trail Run 50km | 49,60 | ×3 |
| ✓ 5 | 30/8/2015 | 2nd Tsukuba Renjyo 48 km Road & Trail Run | 48,00 | ×3 |
| ✓ 6 | 29/4/2018 | 11th Ishioka Trail Run | 46,00 | ×2 |