Futako-Tamagawa Marathon

The Futako-Tamagawa Marathon is a scenic running event held along the banks of the Tama River in Kawasaki, Kanagawa Prefecture, Japan. Organized by the UPRUN Executive Committee, the race offers participants an opportunity to compete over a variety of distances on a flat, accessible riverside course within the greater Tokyo metropolitan area.

Located near the popular Futako-Tamagawa neighbourhood, the event provides a refreshing alternative to traditional city-centre marathons. Rather than navigating busy urban streets, runners follow the open pathways and embankments of the Tama River, enjoying expansive surroundings, fresh air, and a relatively peaceful environment.

The Tama River is one of the most recognizable waterways in the Tokyo metropolitan region, flowing through western Tokyo and Kanagawa Prefecture before reaching Tokyo Bay. Its extensive network of riverside paths, recreational spaces, and open embankments has made it a popular destination for runners, cyclists, walkers, and outdoor enthusiasts.