Ultramarathons in Japan
40 upcoming ultramarathons in Japan.
30 cities
Busiest: November
From €43
Upcoming races
Your guide to ultramarathons in Japan
There are 40 upcoming ultramarathons in Japan, spread across 30 cities. Filter by distance or terrain to narrow things down, and save the races you like the look of.
Most take place in November, December and April. Next up is LAKE BIWA 100 2026 - 100 miles (163.69 km) in Otsu on 30 October 2026.
Questions runners ask
How many ultramarathons in Japan are there?
Finndu lists 40 upcoming ultramarathons in Japan, across 30 towns and cities. The list is updated twice a day as organisers announce new races.
When is the next one?
LAKE BIWA 100 2026 in Otsu, on 30 October 2026.
Which month has the most ultramarathons in Japan?
November, followed by December and April.
How much does it cost to enter?
Entry starts from JP¥8,000. Fees vary from race to race, so check each race page for its current price.