Shigenori (夜久重徳) Yaku
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Born : 1965
Cat. M60 Ultrarunner since 2002
13
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
49
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
Japan26,1%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 844; Σ finishers = 3 232. 844 / 3 232 × 100 = 26.11%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed14
Km — ultra races2 525 km
> 100 km10
> 160 km8
> 200 km7
> 24h2
Longest race250,0 km
20. Sakura Michi Kokusai Nature Run — 19/4/2013
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road35,4%
Trail59,4%
Stage5,2%
Wins & podiums (ultra)
🏆 Win0
🏆 Win M0
🏅 Top 31
🏅 Top 3 M1
Longest winning streak0
Current streak0
Records
HISTORY
13 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 18.05 | 100km | 31th Yatsugatake Nobeyama 100 km |
11:16:23 h | 164 |
| 2024 | ||||
| 19.05 | 100km | 30th Yatsugatake Nobeyama 100 km |
12:44:07 h | 439 |
| 2013 | ||||
| 19.04 | 250km | 20. Sakura Michi Kokusai Nature Run |
35:46:00 h | 65 |
| 2011 | ||||
| 16.04 | 250km | 18. Sakura Michi Kokusai Nature Run |
32:32:00 h | 26 |
| 2009 | ||||
| 18.04 | 250km | 16. Sakura Michi Kokusai Nature Run |
31:55:00 h | 16 |
| 2008 | ||||
| 05.07 | 24h | 3rd Jingu Gaien 24 Hour Challenge |
195.150 km | 9 |
| 19.04 | 250km | 15. Sakura Michi Kokusai Nature Run |
34:36:00 h | 46 |
| 2007 | ||||
| 21.04 | 250km | 14. Sakura Michi Kokusai Nature Run |
29:28:00 h | 12 |
| 2006 | ||||
| 22.04 | 250km | 13. Sakura Michi Kokusai Nature Run |
31:20:00 h | 20 |
| 2004 | ||||
| 12.06 | 24h | 2nd Akiruno 24 Hour Race Japan Cup |
147.439 km | 21 |
| 02.05 | 100km | 6. Okukumano 100 km Ultramarathon |
7:57:30 h | 2 🥈 |
| 2003 | ||||
| 02.05 | 250km | 15. Yamaguchi 100 Hagi-O-Kan Maranic 250 km |
42:39:57 h | 33 |
| 2002 | ||||
| 27.07 | 132km/2stages | Yashagaike Legend Maranic 132 km |
12:01:35 h | 4 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 19/4/2013 | 20. Sakura Michi Kokusai Nature Run | 250,00 | ×5 |
| ✓ 2 | 16/4/2011 | 18. Sakura Michi Kokusai Nature Run | 250,00 | ×5 |
| ✓ 3 | 18/4/2009 | 16. Sakura Michi Kokusai Nature Run | 250,00 | ×5 |
| ✓ 4 | 19/4/2008 | 15. Sakura Michi Kokusai Nature Run | 250,00 | ×5 |
| ✓ 5 | 21/4/2007 | 14. Sakura Michi Kokusai Nature Run | 250,00 | ×5 |
| ✓ 6 | 22/4/2006 | 13. Sakura Michi Kokusai Nature Run | 250,00 | ×5 |
| ✓ 7 | 2/5/2003 | 15. Yamaguchi 100 Hagi-O-Kan Maranic 250 km | 250,00 | ×5 |
| ✓ 8 | 5/7/2008 | 3rd Jingu Gaien 24 Hour Challenge | 195,15 | ×3 |
| ✓ 9 | 12/6/2004 | 2nd Akiruno 24 Hour Race Japan Cup | 147,44 | ×3 |
| ✓ 10 | 27/7/2002 | Yashagaike Legend Maranic 132 km | 132,00 | ×2 |
| ✓ 11 | 18/5/2025 | 31th Yatsugatake Nobeyama 100 km | 100,00 | ×2 |
| ✓ 12 | 19/5/2024 | 30th Yatsugatake Nobeyama 100 km | 100,00 | ×2 |
| ✓ 13 | 2/5/2004 | 6. Okukumano 100 km Ultramarathon | 100,00 | ×2 |