Masaru (中川勝) Nakagawa
External sources
Loading FFA
Loading MV
FFA diagnostics
Run “Search / refresh FFA” to see each season, HTTP response, candidate and DUV comparison.
MarathonView diagnostics
Run “Refresh MV” to see login, session validation and parser status.
Cached locally. Empty refreshes never erase the last valid snapshot.
Born : 1974
Cat. M50 Ultrarunner since 2006
12
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
32
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
Japan9,8%
Rank quotient ?This runner's calculation uses 12 eligible race(s): Σ(rank − 1) = 992; Σ finishers = 10 088. 992 / 10 088 × 100 = 9.83%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed12
Km — ultra races1 100 km
> 100 km2
> 160 km1
Longest race167,0 km
9th Ultra-Trail Mt. Fuji (UTMF) — 26/4/2024
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road43,5%
Trail56,5%
Wins & podiums (ultra)
🏆 Win0
🏆 Win M0
🏅 Top 31
🏅 Top 3 M1
Longest winning streak0
Current streak0
Records
HISTORY
12 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 11.01 | 100km | 9th Yakushima Ultramarathon 100 km |
14:50:26 h | 81 |
| 2025 | ||||
| 08.06 | 100km | 13th Hida Takayama 100 km Ultramarathon |
9:16:01 h | 37 |
| 2024 | ||||
| 26.04 | 167km | 9th Ultra-Trail Mt. Fuji |
36:00:24 h | 381 |
| 14.01 | 100km | 7th Yakushima Ultramarathon 100 km |
15:40:22 h | 79 |
| 2022 | ||||
| 11.12 | 70km | 9th Izu Trail Journey |
9:14:42 h | 155 |
| 20.11 | 106km | 8th FunTrails100K Round |
20:03:36 h | 47 |
| 2021 | ||||
| 12.12 | 69.1km | 8th Izu Trail Journey |
8:44:14 h | 126 |
| 23.07 | 65km | 12th Nozawa Onsen 4100D Mountain Trail Pair |
11:21:19 h | 17 |
| 2018 | ||||
| 30.06 | 45km | 8th Utsukushigahara 45 km Trail Run |
5:09:05 h | 13 |
| 03.06 | 78km | 25. Ultramarathon Okumusashi |
6:35:22 h | 20 |
| 22.04 | 100km | 28th Fuji 5 Lakes 100 km Challenge |
9:26:10 h | 45 |
| 2006 | ||||
| 21.05 | 100km | 12th Yatsugatake Nobeyama 100 km |
8:14:19 h | 3 🥉 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 26/4/2024 | 9th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×5 |
| ✓ 2 | 20/11/2022 | 8th FunTrails100K Round | 106,00 | ×3 |
| ✓ 3 | 11/1/2026 | 9th Yakushima Ultramarathon 100 km | 100,00 | ×3 |
| ✓ 4 | 8/6/2025 | 13th Hida Takayama 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 5 | 14/1/2024 | 7th Yakushima Ultramarathon 100 km | 100,00 | ×3 |
| ✓ 6 | 22/4/2018 | 28th Fuji 5 Lakes 100 km Challenge | 100,00 | ×3 |
| ✓ 7 | 21/5/2006 | 12th Yatsugatake Nobeyama 100 km | 100,00 | ×3 |
| ✓ 8 | 3/6/2018 | 25. Ultramarathon Okumusashi | 78,00 | ×2 |
| ✓ 9 | 11/12/2022 | 9th Izu Trail Journey | 70,00 | ×2 |
| ✓ 10 | 12/12/2021 | 8th Izu Trail Journey | 69,10 | ×2 |
| ✓ 11 | 23/7/2021 | 12th Nozawa Onsen 4100D Mountain Trail Pair | 65,00 | ×2 |
| ✓ 12 | 30/6/2018 | 8th Utsukushigahara 45 km Trail Run | 45,00 | ×1 |