Souichi (林壮一) Hayashi
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Ultrarunner since 2017
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
Japan62,9%
Rank quotient ?This runner's calculation uses 10 eligible race(s): Σ(rank − 1) = 1 307; Σ finishers = 2 077. 1 307 / 2 077 × 100 = 62.93%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed10
Km — ultra races1 131 km
> 100 km5
> 160 km1
> 200 km1
Longest race225,0 km
14th Gunma 100km Walk — 10/5/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road60,2%
Trail8,8%
Ult.Walk30,9%
Records
HISTORY
10 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 24.05 | 100km | 7th Tsukuba Rinrin Road 100km |
20:10:11 h | 107 |
| 10.05 | 225km | 14th Gunma 100km Walk |
20:54:30 h | 125 |
| 2024 | ||||
| 22.09 | 75km | 2nd Mina no Tenku Ultra Marathon |
11:56:26 h | 123 |
| 2023 | ||||
| 14.10 | 100km | 6th Nakasendo to Kisoji Ultra Run |
26:58:11 h | 106 |
| 10.06 | 125km | 7th Fujisan Issyu Walking |
27:00:44 h | 116 |
| 18.03 | 115km | 6th Lake Kasumigaura Ultra Run |
25:31:15 h | 43 |
| 2022 | ||||
| 23.04 | 100km | 4th Hakone Kodo Ultra Walking |
25:10:35 h | 72 |
| 2021 | ||||
| 12.06 | 125km | 5th Fujisan Issyu Walking |
31:42:45 h | 170 |
| 24.04 | 104km | 4th Lake Kasumigaura Ultra Run |
27:06:49 h | 58 |
| 2017 | ||||
| 02.07 | 62km | 1st Nikko 62km Ultramarathon |
9:08:50 h | 397 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 10/5/2025 | 14th Gunma 100km Walk | 225,00 | ×7 |
| ✓ 2 | 10/6/2023 | 7th Fujisan Issyu Walking | 125,00 | ×4 |
| ✓ 3 | 12/6/2021 | 5th Fujisan Issyu Walking | 125,00 | ×4 |
| ✓ 4 | 18/3/2023 | 6th Lake Kasumigaura Ultra Run | 115,00 | ×3 |
| ✓ 5 | 24/4/2021 | 4th Lake Kasumigaura Ultra Run | 104,00 | ×3 |
| ✓ 6 | 24/5/2025 | 7th Tsukuba Rinrin Road 100km | 100,00 | ×3 |
| ✓ 7 | 14/10/2023 | 6th Nakasendo to Kisoji Ultra Run | 100,00 | ×3 |
| ✓ 8 | 23/4/2022 | 4th Hakone Kodo Ultra Walking | 100,00 | ×3 |
| ✓ 9 | 22/9/2024 | 2nd Mina no Tenku Ultra Marathon | 75,00 | ×2 |
| ✓ 10 | 2/7/2017 | 1st Nikko 62km Ultramarathon | 62,00 | ×2 |