Koushi (向山幸志) Mukaiyama
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Born : 1974
Cat. M50 Ultrarunner since 2001
10
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
25
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
Japan65,7%
Rank quotient ?This runner's calculation uses 10 eligible race(s): Σ(rank − 1) = 11 960; Σ finishers = 18 192. 11 960 / 18 192 × 100 = 65.74%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed10
Km — ultra races858 km
Longest race100,0 km
34. Lake Saroma 100 km Ultramarathon — 30/6/2019
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road58,3%
Trail41,7%
Records
HISTORY
10 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2019 | ||||
| 30.06 | 100km | 34. Lake Saroma 100 km Ultramarathon |
12:31:56 h | 1715 |
| 2018 | ||||
| 24.06 | 100km | 33. Lake Saroma 100 km Ultramarathon |
12:34:17 h | 1843 |
| 2017 | ||||
| 25.06 | 100km | 32. Lake Saroma 100 km Ultramarathon |
12:47:19 h | 1916 |
| 2016 | ||||
| 26.06 | 100km | 31. Lake Saroma 100 km Ultramarathon |
12:54:01 h | 2522 |
| 2015 | ||||
| 28.06 | 100km | 30. Lake Saroma 100 km Ultramarathon |
12:40:11 h | 2157 |
| 2008 | ||||
| 12.10 | 71.5km | 16th Hasetsune Cup - Japan Mountain Endurance Race |
15:36:16 h | 696 |
| 2005 | ||||
| 09.10 | 71.5km | 13th Hasetsune Cup - Japan Mountain Endurance Race |
15:12:07 h | 262 |
| 2004 | ||||
| 10.10 | 71.5km | 12th Hasetsune Cup - Japan Mountain Endurance Race |
15:16:55 h | 187 |
| 2003 | ||||
| 25.10 | 71.5km | 11th Hasetsune Cup - Japan Mountain Endurance Race |
16:19:22 h | 328 |
| 2001 | ||||
| 06.10 | 71.5km | 9th Hasetsune Cup - Japan Mountain Endurance Race |
18:38:43 h | 344 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 30/6/2019 | 34. Lake Saroma 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 2 | 24/6/2018 | 33. Lake Saroma 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 3 | 25/6/2017 | 32. Lake Saroma 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 4 | 26/6/2016 | 31. Lake Saroma 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 5 | 28/6/2015 | 30. Lake Saroma 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 6 | 12/10/2008 | 16th Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 7 | 9/10/2005 | 13th Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 8 | 10/10/2004 | 12th Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 9 | 25/10/2003 | 11th Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |
| ✓ 10 | 6/10/2001 | 9th Hasetsune Cup - Japan Mountain Endurance Race | 71,50 | ×2 |