21st Shonan International Marathon 2026

About this event

Set along the Shonan coastline, this is one of Japan's leading citizen marathons, bringing together approximately 26,000 participants. Held on Sunday, December 6, 2026, with the Oiso Prince Hotel serving as the main venue, runners journey toward Enoshima along the Seisho Bypass overlooking the Pacific Ocean and National Route 134, an iconic symbol of Shonan. The flat course welcomes a wide range of participants, from beginners to runners aiming for personal records, and features stunning views of the sea and Mount Fuji. Known for its environmental consciousness, the race utilizes a "My Bottle Marathon" system that avoids single-use cups and plastic bottles. The 2026 edition introduces the new "Beginner Relief Plan" to assist first-time runners from preparation to race day through online courses and community support. Additionally, the "Team S.I.M" running clinic with race entry rights offers training programs designed for all runners. Ultrarunner Myako serves as the official race ambassador and will act as a 3-hour-30-minute pacer. Beyond race day, training sessions and events take place year-round, making the Shonan International Marathon a collective achievement supported not only by runners, but also by local communities, volunteers, and sponsoring companies.

Venue

Oiso Prince Hotel

546 Kokufuhongo, Oiso-machi, Naka-gun, Kanagawa 259-0193