Ultra Running Hub Anikoyawatari, Kitaakita, Akita Pref., Japan · Sunday, September 27, 2026
Fixed Distance 50K
Akita Nairiku 50km Marathon
Race completed
50 km Distance
not publishedn/a Climbing
2.5 est Grit · Entry level
Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.
What the course asks
Time limit 7 hours
8:24 min/km average. Tight. Sustained running. Long aid-station stops will cost you. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Among the tightest 50K cut-offs we track. Measured against 1087 races of the same distance. Cut-off calculator →
Field size ~168 Mid-sized. Company early, well spread out by halfway.
DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, September
Daylight 12 h 01 m of light
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 50km | 168 | Kazuki Matsushita · 03:08:49 | Ari Obuchi · 03:28:21 |
| 2024 | 50km | 206 | Tomoki Kudou · 02:55:42 | Emi Saito · 03:54:38 |
| 2023 | 50km | 261 | Keita Sato · 03:24:14 | Ari Obuchi · 03:33:40 |
| 2022 | 50km | 156 | Katsuki Iijima · 03:34:44 | Chiharu Abukawa · 04:15:59 |
| 2019 | 50km | 255 | Takayoshi Haga · 03:24:25 | Rie Oi · 03:50:08 |
| 2018 | 50km | 215 | Takuya Uesugi · 03:18:57 | Chiaki Yoshida · 03:47:25 |
| 2017 | 50km | 207 | Kazuyuki Meutsuri · 03:15:08 | Chiaki Yoshida · 03:48:04 |
| 2016 | 50km | 211 | Kazuyuki Meutsuri · 03:17:30 | Hitomi Kato · 04:05:46 |
| 2015 | 50km | 231 | Kazuyuki Meutsuri · 03:16:01 | Yuko Uchida · 04:20:08 |
| 2014 | 50km | 240 | Kazuyuki Meutsuri · 03:18:27 | Yuko Miura · 04:23:32 |
The field shrank 18% between 2024 (206) and 2025 (168). 32% of the 2025 field were women.
DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Course notes
- gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of trail.
- Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition 50 km of self-supported fuelling between aid stations.
- Hydration Vests Flask capacity for 50 km, without the bounce.
- GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.
Similar races
Other 50K trail ultras, closest in distance first.