Masashi (久保田政志) Kubota
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 : 1966
Cat. M60 Ultrarunner since 2008
12
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
35
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
Japan21,2%
Rank quotient ?This runner's calculation uses 12 eligible race(s): Σ(rank − 1) = 2 111; Σ finishers = 9 959. 2 111 / 9 959 × 100 = 21.20%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed12
Km — ultra races1 458 km
> 100 km7
> 160 km3
> 200 km1
Longest race201,0 km
8th Biwako Tourism Ultramannic 200 km — 28/5/2016
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road43,7%
Trail56,3%
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 | |
|---|---|---|---|---|
| 2016 | ||||
| 28.05 | 201km | 8th Biwako Tourism Ultramannic 200 km |
27:50:00 h | 2 🥈 |
| 2015 | ||||
| 06.06 | 100km | 3rd Tokyo Shibamata 100 km |
9:17:03 h | 57 |
| 2014 | ||||
| 25.04 | 100mi | 3rd Ultra-Trail Mt. Fuji |
34:21:24 h | 165 |
| 2013 | ||||
| 26.04 | 100mi | 2nd Ultra-Trail Mount Fuji |
34:17:59 h | 200 |
| 2012 | ||||
| 07.10 | 71.5km | 20th Hasetsune Cup - Japan Mountain Endurance Race |
14:25:10 h | 643 |
| 18.05 | 156km | 1st Ultra-Trail Mount Fuji |
35:04:47 h | 143 |
| 2011 | ||||
| 09.10 | 71.5km | 19th Hasetsune Cup - Japan Mountain Endurance Race |
13:44:12 h | 418 |
| 30.04 | 112km | 21st Fuji 5 Lakes 112 km Challenge |
10:34:47 h | 24 |
| 2010 | ||||
| 16.05 | 100km | 16th Yatsugatake Nobeyama 100 km |
10:36:58 h | 106 |
| 25.04 | 112km | 20th Fuji 5 Lakes 112 km Challenge |
11:15:31 h | 42 |
| 2009 | ||||
| 26.04 | 112km | 19th Fuji 5 Lakes 112 km Challenge |
11:59:58 h | 46 |
| 2008 | ||||
| 18.05 | 100km | 14th Yatsugatake Nobeyama 100 km |
12:25:10 h | 277 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 28/5/2016 | 8th Biwako Tourism Ultramannic 200 km | 201,00 | ×5 |
| ✓ 2 | 25/4/2014 | 3rd Ultra-Trail Mt. Fuji (UTMF) | 160,93 | ×4 |
| ✓ 3 | 26/4/2013 | 2nd Ultra-Trail Mount Fuji (UTMF) | 160,93 | ×4 |
| ✓ 4 | 18/5/2012 | 1st Ultra-Trail Mount Fuji (UTMF) | 156,00 | ×4 |
| ✓ 5 | 30/4/2011 | 21st Fuji 5 Lakes 112 km Challenge | 112,00 | ×3 |
| ✓ 6 | 25/4/2010 | 20th Fuji 5 Lakes 112 km Challenge | 112,00 | ×3 |
| ✓ 7 | 26/4/2009 | 19th Fuji 5 Lakes 112 km Challenge | 112,00 | ×3 |
| ✓ 8 | 6/6/2015 | 3rd Tokyo Shibamata 100 km | 100,00 | ×2 |
| ✓ 9 | 16/5/2010 | 16th Yatsugatake Nobeyama 100 km | 100,00 | ×2 |
| ✓ 10 | 18/5/2008 | 14th Yatsugatake Nobeyama 100 km | 100,00 | ×2 |
| ✓ 11 | 7/10/2012 | 20th Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 12 | 9/10/2011 | 19th Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |