Akemi (新山明美) Niiyama
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Ultrarunner since 2017
14
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
Japan51,5%
Rank quotient ?This runner's calculation uses 14 eligible race(s): Σ(rank − 1) = 5 324; Σ finishers = 10 330. 5 324 / 10 330 × 100 = 51.54%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed14
Km — ultra races1 308 km
> 100 km3
Longest race115,0 km
16th Oedo Night run 115k — 14/3/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
HISTORY
14 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 31.05 | 100km | 2nd Shimanami Surround 100km |
14:47:57 h | 89 |
| 14.03 | 115km | 16th Oedo Night run 115k |
18:20:13 h | 93 |
| 2025 | ||||
| 18.05 | 100km | 31th Yatsugatake Nobeyama 100 km |
13:41:19 h | 891 |
| 2024 | ||||
| 20.10 | 100km | 30th River Shimanto 100km |
12:52:24 h | 698 |
| 09.03 | 115km | 14th Oedo Night run 115k |
18:23:36 h | 67 |
| 2023 | ||||
| 15.10 | 100km | 29th River Shimanto 100km |
12:43:30 h | 563 |
| 04.06 | 78km | 30. Ultramarathon Okumusashi |
9:42:00 h | 345 |
| 11.03 | 115km | 13th Oedo Night run 115k |
18:24:36 h | 48 |
| 2022 | ||||
| 05.06 | 78km | 29. Ultramarathon Okumusashi |
10:18:56 h | 616 |
| 2021 | ||||
| 27.02 | 91km | 11th Little Edo 91k |
13:41:55 h | 40 |
| 2019 | ||||
| 20.10 | 100km | 25th River Shimanto 100km |
12:27:20 h | 566 |
| 02.06 | 78km | 26. Ultramarathon Okumusashi |
8:57:00 h | 495 |
| 2018 | ||||
| 03.06 | 78km | 25. Ultramarathon Okumusashi |
9:44:17 h | 597 |
| 2017 | ||||
| 15.10 | 60km | 23rd River Shimanto 60km |
7:42:27 h | 230 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 14/3/2026 | 16th Oedo Night run 115k | 115,00 | ×3 |
| ✓ 2 | 9/3/2024 | 14th Oedo Night run 115k | 115,00 | ×3 |
| ✓ 3 | 11/3/2023 | 13th Oedo Night run 115k | 115,00 | ×3 |
| ✓ 4 | 31/5/2026 | 2nd Shimanami Surround 100km | 100,00 | ×3 |
| ✓ 5 | 18/5/2025 | 31th Yatsugatake Nobeyama 100 km | 100,00 | ×3 |
| ✓ 6 | 20/10/2024 | 30th River Shimanto 100km | 100,00 | ×3 |
| ✓ 7 | 15/10/2023 | 29th River Shimanto 100km | 100,00 | ×3 |
| ✓ 8 | 20/10/2019 | 25th River Shimanto 100km | 100,00 | ×3 |
| ✓ 9 | 27/2/2021 | 11th Little Edo 91k | 91,00 | ×2 |
| ✓ 10 | 4/6/2023 | 30. Ultramarathon Okumusashi | 78,00 | ×2 |
| ✓ 11 | 5/6/2022 | 29. Ultramarathon Okumusashi | 78,00 | ×2 |
| ✓ 12 | 2/6/2019 | 26. Ultramarathon Okumusashi | 78,00 | ×2 |
| ✓ 13 | 3/6/2018 | 25. Ultramarathon Okumusashi | 78,00 | ×2 |
| ✓ 14 | 15/10/2017 | 23rd River Shimanto 60km | 60,00 | ×1 |