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Japan Sea to Summit

📅 July 8, 2027 (estimated date)📍 Oyama · Japan

⚠️ 2027 edition: provisional information

The date is estimated from the 2026 edition (July 9, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.

Available distances

50 km

About

Japan Sea to Summit is a demanding 50 km ultramarathon based in Oyama, Japan, on 8 July 2027, in which participants climb Mount Fuji on foot from sea level. The unique route puts the emphasis on substantial elevation gain.

The event includes an acclimatisation hike on a neighbouring mountain to prepare for the main ascent. After reaching the summit of Mount Fuji, participants round off the experience with a visit to Lake Kawaguchi to rest and recover. It offers a distinctive way to climb one of Japan's most iconic peaks, as part of a wider series of Sea to Summit ultramarathons.

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