Takashi (千葉俊) Chiba
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Born : 1980
Cat. M45 Ultrarunner since 2016
12
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
37
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
Japan72,0%
Rank quotient ?This runner's calculation uses 12 eligible race(s): Σ(rank − 1) = 3 541; Σ finishers = 4 919. 3 541 / 4 919 × 100 = 71.99%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed13
Km — ultra races1 632 km
> 100 km6
> 160 km3
> 200 km1
Longest race266,0 km
6th Michinoku Tsugaru Journey Run 263K — 16/7/2022
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road85,6%
Trail6,4%
Stage8,0%
Records
HISTORY
12 race(s) · 2 stage(s) nested| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 14.03 | 200km | 16th Little Edo Oedo 200k |
35:03:54 h | 204 |
| 2025 | ||||
| 01–02.11 | 130km/2stages | 3rd Mito Kaido Journey run |
19:41:52 h | 45 |
| 01.11 | 62.2km | 3rd Mito Kaido Journey run - Stage 1 | 9:47:57 h | 61 |
| 02.11 | 68.1km | 3rd Mito Kaido Journey run - Stage 2 | 9:53:55 h | 36 |
| 30.08 | 105km | 2nd Sendai Ultra 100km |
17:13:20 h | 27 |
| 08.06 | 100km | 19th Iwate Ginga 100km Marathon Challenge |
13:27:02 h | 515 |
| 2024 | ||||
| 13.07 | 154km | 8th Michinoku Tsugaru Journey Run 154K |
27:46:29 h | 50 |
| 2022 | ||||
| 16.07 | 266km | 6th Michinoku Tsugaru Journey Run 263K |
2d 01:44:52 h | 57 |
| 12.06 | 100km | 16th Iwate Ginga 100km Marathon Challenge |
12:54:59 h | 463 |
| 2019 | ||||
| 22.09 | 100km | 29. Akita Nairiku 100km Marathon |
12:39:21 h | 411 |
| 13.07 | 177km | 4th Michinoku Tsugaru Journey Run 177K |
34:09:16 h | 78 |
| 09.06 | 100km | 15th Iwate Ginga 100km Marathon Challenge |
13:35:05 h | 555 |
| 2018 | ||||
| 23.09 | 100km | 28. Akita Nairiku 100km Marathon |
12:43:07 h | 372 |
| 2016 | ||||
| 12.06 | 100km | 12th Iwate Ginga 100km Marathon Challenge |
13:35:11 h | 776 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 16/7/2022 | 6th Michinoku Tsugaru Journey Run 263K | 266,00 | ×7 |
| ✓ 2 | 14/3/2026 | 16th Little Edo Oedo 200k | 200,00 | ×5 |
| ✓ 3 | 13/7/2019 | 4th Michinoku Tsugaru Journey Run 177K | 177,00 | ×4 |
| ✓ 4 | 13/7/2024 | 8th Michinoku Tsugaru Journey Run 154K | 154,00 | ×4 |
| ✓ 5 | 1/11/2025 | 3rd Mito Kaido Journey run | 130,00 | ×3 |
| ✓ 6 | 30/8/2025 | 2nd Sendai Ultra 100km | 105,00 | ×2 |
| ✓ 7 | 8/6/2025 | 19th Iwate Ginga 100km Marathon Challenge | 100,00 | ×2 |
| ✓ 8 | 12/6/2022 | 16th Iwate Ginga 100km Marathon Challenge | 100,00 | ×2 |
| ✓ 9 | 22/9/2019 | 29. Akita Nairiku 100km Marathon | 100,00 | ×2 |
| ✓ 10 | 9/6/2019 | 15th Iwate Ginga 100km Marathon Challenge | 100,00 | ×2 |
| ✓ 11 | 23/9/2018 | 28. Akita Nairiku 100km Marathon | 100,00 | ×2 |
| ✓ 12 | 12/6/2016 | 12th Iwate Ginga 100km Marathon Challenge | 100,00 | ×2 |