Keizo (伊藤恵三) Ito
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Ultrarunner since 2021
10
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
31
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
Japan44,7%
Rank quotient ?This runner's calculation uses 10 eligible race(s): Σ(rank − 1) = 907; Σ finishers = 2 030. 907 / 2 030 × 100 = 44.68%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed10
Km — ultra races1 060 km
> 100 km3
Longest race125,0 km
8th Fujisan Issyu Walking — 25/5/2024
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road37,7%
Trail10,4%
Ult.Walk51,9%
Records
HISTORY
10 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 28.03 | 100km | 2nd Tokyo Story Ultra Walking |
25:48:56 h | 168 |
| 2025 | ||||
| 22.03 | 100km | 1st Tokyo Story Ultra Walking |
23:31:22 h | 114 |
| 2024 | ||||
| 12.10 | 100km | 7th Nakasendo to Kisoji Ultra Run |
26:33:37 h | 102 |
| 25.05 | 125km | 8th Fujisan Issyu Walking |
26:14:51 h | 117 |
| 13.01 | 100km | 1st Nara Mahoroba Ultra Walking |
22:03:34 h | 78 |
| 2023 | ||||
| 14.10 | 100km | 6th Nakasendo to Kisoji Ultra Run |
25:11:14 h | 71 |
| 10.06 | 125km | 7th Fujisan Issyu Walking |
26:56:01 h | 110 |
| 11.02 | 110km | 1st Awaji Island Round Ultra |
21:53:46 h | 47 |
| 2022 | ||||
| 15.10 | 100km | 5th Nakasendo to Kisoji Ultra Run |
23:48:55 h | 42 |
| 2021 | ||||
| 16.10 | 100km | 4th Nakasendo to Kisoji Ultra Run |
25:09:33 h | 68 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 25/5/2024 | 8th Fujisan Issyu Walking | 125,00 | ×4 |
| ✓ 2 | 10/6/2023 | 7th Fujisan Issyu Walking | 125,00 | ×4 |
| ✓ 3 | 11/2/2023 | 1st Awaji Island Round Ultra | 110,00 | ×3 |
| ✓ 4 | 28/3/2026 | 2nd Tokyo Story Ultra Walking | 100,00 | ×3 |
| ✓ 5 | 22/3/2025 | 1st Tokyo Story Ultra Walking | 100,00 | ×3 |
| ✓ 6 | 12/10/2024 | 7th Nakasendo to Kisoji Ultra Run | 100,00 | ×3 |
| ✓ 7 | 13/1/2024 | 1st Nara Mahoroba Ultra Walking | 100,00 | ×3 |
| ✓ 8 | 14/10/2023 | 6th Nakasendo to Kisoji Ultra Run | 100,00 | ×3 |
| ✓ 9 | 15/10/2022 | 5th Nakasendo to Kisoji Ultra Run | 100,00 | ×3 |
| ✓ 10 | 16/10/2021 | 4th Nakasendo to Kisoji Ultra Run | 100,00 | ×3 |