Masanori (片山征典) Katayama
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 : 1964
Cat. M60 Ultrarunner since 2006
17
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
33
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
Japan19,0%
Rank quotient ?This runner's calculation uses 17 eligible race(s): Σ(rank − 1) = 2 477; Σ finishers = 13 049. 2 477 / 13 049 × 100 = 18.98%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed17
Km — ultra races1 556 km
> 100 km1
Longest race112,0 km
19th Fuji 5 Lakes 112 km Challenge — 26/4/2009
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
HISTORY
17 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 26/4/2009 | 19th Fuji 5 Lakes 112 km Challenge | 112,00 | ×3 |
| ✓ 2 | 11/6/2017 | 6th Hida Takayama 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 3 | 16/10/2016 | 22nd River Shimanto 100km | 100,00 | ×3 |
| ✓ 4 | 18/9/2016 | 16th Tango 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 5 | 19/10/2014 | 20th River Shimanto 100km | 100,00 | ×3 |
| ✓ 6 | 14/9/2014 | 14th Tango 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 7 | 18/10/2009 | 15th River Shimanto 100km | 100,00 | ×3 |
| ✓ 8 | 27/9/2009 | 12th Muraoka 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 9 | 19/10/2008 | 14th River Shimanto 100km | 100,00 | ×3 |
| ✓ 10 | 28/9/2008 | 11th Muraoka 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 11 | 14/9/2008 | 8th Tango 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 12 | 14/10/2007 | 13th River Shimanto 100km | 100,00 | ×3 |
| ✓ 13 | 29/9/2007 | 10th Muraoka 88 km Ultra Marathon | 88,00 | ×2 |
| ✓ 14 | 24/9/2017 | 20th Muraoka 66 km Ultra Marathon | 66,00 | ×2 |
| ✓ 15 | 29/9/2013 | 16th Muraoka 66 km Ultra Marathon | 66,00 | ×2 |
| ✓ 16 | 28/9/2025 | 28th Muraoka 64 km Ultra Marathon | 64,00 | ×1 |
| ✓ 17 | 15/10/2006 | 12th River Shimanto 60km | 60,00 | ×1 |