Shonan International Marathon
Race snapshot
Race Day
43–57°F · Feels cool
Total elevation gain
Relatively flat course · Net elevation change +0 ft
Participants
Major marathon
Crowd Rating
Moderate spectator support
The Lowdown
The Shonan International Marathon runs along the Shonan coast in Kanagawa, with views of Mt. Fuji and the sea. The full marathon starts on the Seisho Bypass at Oiso-Nishi IC, turns near the Enoshima entrance and again at Ninomiya IC, and finishes at the Oiso Prince Hotel. The organizer describes the course as flat and recommends it for a first marathon or a personal best. The full marathon field is capped at 19,500 runners, and entries are first-come, first-served through LAWSON DO! SPORTS and RUNNET, with a separate RunJapan route for runners living outside Japan. The finish closes at 6 hours 30 minutes, with nine cut-off points along the way. A 10 km fun run, a 2 km kids' run and a 1.4 km run and walk start the same morning.
Explore the course
Edition unconfirmed · Marathon
Questions about the Shonan International Marathon 2026
When is the Shonan International Marathon 2026?
Sunday, December 6, 2026.
What time does the Shonan International Marathon start?
The race starts at 9:00 AM, local time.
What is the Shonan International Marathon time limit?
6h30m finish; nine cut-offs.
How do I enter the Shonan International Marathon 2026?
The race is sold out. Apr 4, 2026: Entries opened (first-come, first-served). Ways in: Internet entry only, first-come, first-served, through LAWSON DO! SPORTS and RUNNET; Runners living outside Japan enter the full marathon through RunJapan.
What is the Shonan International Marathon course like?
40 m of total elevation gain. It passes Oiso-Nishi IC (Seisho Bypass), Enoshima entrance and Ninomiya IC (Seisho Bypass).
What is the weather like at the Shonan International Marathon?
Race-day temperatures are usually 6–14 °C (43–57 °F).
Where are the Shonan International Marathon results?
The official 2025 results are on the organizer's site. Official results
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