Mitsuyuki (榊原光之) Sakakibara
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15
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
34
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
40,9%
Rank quotient ?This runner's calculation uses 15 eligible race(s): Σ(rank − 1) = 1 732; Σ finishers = 4 238. 1 732 / 4 238 × 100 = 40.87%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed15
Km — ultra races1 515 km
> 100 km7
> 160 km2
> 200 km1
Longest race276,0 km
19th Nagasaki Tachibana Gulf Coast Super Maranic 276 — 22/11/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road36,6%
Trail63,4%
Records
HISTORY
15 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 09.05 | 114km | 22:39:19 h | 192 | |
| 2025 | ||||
| 22.11 | 276km | 2d 09:19:41 h | 16 | |
| 10.08 | 50km | 10:52:51 h | 89 | |
| 10.05 | 115.1km | 23:44:02 h | 301 | |
| 2024 | ||||
| 21.07 | 66km | 12:50:07 h | 155 | |
| 11.05 | 115.1km | 23:45:11 h | 243 | |
| 2023 | ||||
| 23.07 | 66km | 10:39:19 h | 112 | |
| 2022 | ||||
| 29.05 | 64km | 11:44:08 h | 85 | |
| 2021 | ||||
| 25.07 | 60km | 9:55:48 h | 78 | |
| 2018 | ||||
| 02.11 | 105km | 15:11:54 h | 103 | |
| 21.07 | 67.5km | 10:14:59 h | 67 | |
| 12.05 | 108.7km | 23:31:38 h | 151 | |
| 2017 | ||||
| 23.07 | 67.5km | 9:10:28 h | 31 | |
| 04.05 | 173km | 27:34:20 h | 38 | |
| 2016 | ||||
| 24.07 | 67.5km | 10:28:25 h | 86 | |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 22/11/2025 | 19th Nagasaki Tachibana Gulf Coast Super Maranic 276 | 276,00 | ×8 |
| ✓ 2 | 4/5/2017 | 11th Nagasaki Tachibana Gulf Coast Super Maranic 173 | 173,00 | ×5 |
| ✓ 3 | 10/5/2025 | 3rd Aso Volcano Trail | 115,10 | ×3 |
| ✓ 4 | 11/5/2024 | 2nd Aso Volcano Trail | 115,10 | ×3 |
| ✓ 5 | 9/5/2026 | 4th Aso Volcano Trail | 114,00 | ×3 |
| ✓ 6 | 12/5/2018 | 2nd Aso Round Trail | 108,70 | ×3 |
| ✓ 7 | 2/11/2018 | Tachibana Bay Coast 105 Ultra Marathon | 105,00 | ×3 |
| ✓ 8 | 21/7/2018 | 6th Kirishima Ebino-kougen Extreme Trail | 67,50 | ×1 |
| ✓ 9 | 23/7/2017 | 5th Kirishima Ebino-kougen Extreme Trail | 67,50 | ×1 |
| ✓ 10 | 24/7/2016 | 4th Kirishima Ebino-kougen Extreme Trail | 67,50 | ×1 |
| ✓ 11 | 21/7/2024 | 12th Kirishima Ebino-kougen Extreme Trail | 66,00 | ×1 |
| ✓ 12 | 23/7/2023 | 11th Kirishima Ebino-kougen Extreme Trail | 66,00 | ×1 |
| ✓ 13 | 29/5/2022 | 5th Mizukami Mountain Party | 64,00 | ×1 |
| ✓ 14 | 25/7/2021 | 9th Kirishima Ebino-kougen Extreme Trail | 60,00 | ×1 |
| ✓ 15 | 10/8/2025 | 4th Yacchiro Dragon Trail | 50,00 | ×1 |