Tetsuya (指宿徹也) Ibusuki
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Born : 1971
Cat. M55 Ultrarunner since 2015
7
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
25
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
Japan23,4%
Rank quotient ?This runner's calculation uses 7 eligible race(s): Σ(rank − 1) = 1 836; Σ finishers = 7 835. 1 836 / 7 835 × 100 = 23.43%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed7
Km — ultra races660 km
Longest race100,0 km
20th Iwate Ginga 100km Marathon Challenge — 14/6/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
HISTORY
7 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 14.06 | 100km | 20th Iwate Ginga 100km Marathon Challenge |
9:15:56 h | 35 |
| 2025 | ||||
| 31.05 | 100km | 5th Lake Suwa Ultra Marathon - 100 km |
9:20:00 h | 4 |
| 2019 | ||||
| 30.06 | 100km | 34. Lake Saroma 100 km Ultramarathon |
10:23:37 h | 517 |
| 19.05 | 100km | 7th Tokyo Shibamata 100 km |
11:15:16 h | 365 |
| 2018 | ||||
| 22.04 | 100km | 28th Fuji 5 Lakes 100 km Challenge |
9:48:47 h | 98 |
| 2016 | ||||
| 05.06 | 60km | 4th Tokyo Shibamata 60 km |
6:17:07 h | 148 |
| 2015 | ||||
| 06.06 | 100km | 3rd Tokyo Shibamata 100 km |
12:31:06 h | 676 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 14/6/2026 | 20th Iwate Ginga 100km Marathon Challenge | 100,00 | ×4 |
| ✓ 2 | 31/5/2025 | 5th Lake Suwa Ultra Marathon - 100 km | 100,00 | ×4 |
| ✓ 3 | 30/6/2019 | 34. Lake Saroma 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 4 | 19/5/2019 | 7th Tokyo Shibamata 100 km | 100,00 | ×4 |
| ✓ 5 | 22/4/2018 | 28th Fuji 5 Lakes 100 km Challenge | 100,00 | ×4 |
| ✓ 6 | 6/6/2015 | 3rd Tokyo Shibamata 100 km | 100,00 | ×4 |
| ✓ 7 | 5/6/2016 | 4th Tokyo Shibamata 60 km | 60,00 | ×2 |