Ecomarathon Horikiri

Ecomarathon Horikiri takes place in Katsushika, Tokyo, Japan, near Horikiri Shoubuen station, with a half marathon, a 10 km and a 5 km parent-and-child race on 28 March 2027. The start is at 11am in Horikiri Waterside Park. The half marathon and the 10 km are both run on a loop course, as is the 5 km parent-and-child race, which lets families take part together. The route runs past lakes and ponds in a calm, green setting, suited to fast times and relaxed running alike. The event remains small, with around 300 participants.

Ecomarathon stages several sporting events across Japan, including in Saitama, Osaka, Hiroshima, Kyoto and Kumamoto prefectures as well as Tokyo, with a commitment to environmental and social causes. Part of each edition's proceeds goes to food aid and refugee support organisations, including Second Harvest Japan, the country's first food bank.