Tomohiro (草川知宏) Kusakawa
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Born : 1976
Cat. M50 Ultrarunner since 2015
15
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
42
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
Japan10,9%
Rank quotient ?This runner's calculation uses 15 eligible race(s): Σ(rank − 1) = 1 225; Σ finishers = 11 254. 1 225 / 11 254 × 100 = 10.89%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed15
Km — ultra races2 110 km
> 100 km4
> 160 km3
> 200 km2
Longest race400,0 km
11. Okinawa Hontō survival run — 21/11/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road78,7%
Trail21,3%
Wins & podiums (ultra)
🏆 Win1
🏆 Win M2
🏅 Top 33
🏅 Top 3 M3
Longest winning streak1
Current streak0
HISTORY
15 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 28.03 | 160km | 1st Shinkun Iga-goe Route Journey Run |
20:56:00 h | 3 🥉 |
| 2025 | ||||
| 21.11 | 400km | 11. Okinawa Hontō survival run |
2d 14:12:45 h | 1 🏆 |
| 2023 | ||||
| 24.11 | 400km | 9. Okinawa Hontō survival run |
2d 07:14:29 h | 2 🥈 |
| 13.05 | 50mi | 9th Mt. Hiei Int. 50 Mile Trail Run |
11:20:27 h | 26 |
| 2022 | ||||
| 07.10 | 169km | 2nd Lake Biwa 100 |
37:16:52 h | 26 |
| 21.05 | 50mi | 8th Mt. Hiei Int. 50 Mile Trail Run |
11:04:42 h | 46 |
| 2019 | ||||
| 07.04 | 70km | 5th Okumikawa Power Trail |
11:33:57 h | 203 |
| 2018 | ||||
| 16.09 | 100km | 18th Tango 100 km Ultramarathon |
10:45:19 h | 135 |
| 10.06 | 100km | 7th Hida Takayama 100 km Ultramarathon |
10:31:52 h | 161 |
| 22.04 | 100km | 28th Fuji 5 Lakes 100 km Challenge |
9:47:08 h | 90 |
| 2017 | ||||
| 11.06 | 100km | 6th Hida Takayama 100 km Ultramarathon |
9:41:36 h | 89 |
| 13.05 | 50km | 3rd Mt. Hiei Int. 50 km Trail Run |
7:50:01 h | 69 |
| 2016 | ||||
| 18.09 | 100km | 16th Tango 100 km Ultramarathon |
11:10:29 h | 220 |
| 12.06 | 100km | 5th Hida Takayama 100 km Ultramarathon |
9:47:59 h | 77 |
| 2015 | ||||
| 18.10 | 100km | 21st River Shimanto 100km |
9:44:45 h | 92 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 21/11/2025 | 11. Okinawa Hontō survival run | 400,00 | ×9 |
| ✓ 2 | 24/11/2023 | 9. Okinawa Hontō survival run | 400,00 | ×9 |
| ✓ 3 | 7/10/2022 | 2nd Lake Biwa 100 | 169,00 | ×4 |
| ✓ 4 | 28/3/2026 | 1st Shinkun Iga-goe Route Journey Run | 160,00 | ×3 |
| ✓ 5 | 16/9/2018 | 18th Tango 100 km Ultramarathon | 100,00 | ×2 |
| ✓ 6 | 10/6/2018 | 7th Hida Takayama 100 km Ultramarathon | 100,00 | ×2 |
| ✓ 7 | 22/4/2018 | 28th Fuji 5 Lakes 100 km Challenge | 100,00 | ×2 |
| ✓ 8 | 11/6/2017 | 6th Hida Takayama 100 km Ultramarathon | 100,00 | ×2 |
| ✓ 9 | 18/9/2016 | 16th Tango 100 km Ultramarathon | 100,00 | ×2 |
| ✓ 10 | 12/6/2016 | 5th Hida Takayama 100 km Ultramarathon | 100,00 | ×2 |
| ✓ 11 | 18/10/2015 | 21st River Shimanto 100km | 100,00 | ×2 |
| ✓ 12 | 13/5/2023 | 9th Mt. Hiei Int. 50 Mile Trail Run | 80,47 | ×1 |
| ✓ 13 | 21/5/2022 | 8th Mt. Hiei Int. 50 Mile Trail Run | 80,47 | ×1 |
| ✓ 14 | 7/4/2019 | 5th Okumikawa Power Trail | 70,00 | ×1 |
| ✓ 15 | 13/5/2017 | 3rd Mt. Hiei Int. 50 km Trail Run | 50,00 | ×1 |