Race certified by Finishers: event approved by the organizer

Ecomarathon Horikiri 2026

Next event date confirmed
Book now
Photo credits: Flickr

The event in a few words

Get ready for the Horikiri Ecomarathon, a sporting experience in March in the heart of Tokyo Prefecture in the Japan ๐Ÿ‡ฏ๐Ÿ‡ต. Specifically, it is in the Katsushika Ward, near Horikiri Shoubuen station, at the Horikiri Waterside Park, where you will start your race at 11 AM sharp ! ๐Ÿ•š You are therefore set for two race options: a half-marathon or a 10 km, all in the form of a loop. If you have come with your family ๐Ÿ‘จโ€๐Ÿ‘ฉโ€๐Ÿ‘งโ€๐Ÿ‘ฆ, a parent-child 5 km race is organized. The course also takes the form of a loop ๐Ÿ”‚. You will enjoy a course surrounded by lakes, ponds, and beautiful nature ๐Ÿƒ. You will be immersed in a peaceful and inspiring environment, perfect for breaking your personal record or simply savoring every stride ๐Ÿ’ช. Moreover, you run in a small group of 300 people, ideal for meeting new people ๐Ÿค—.

With several other sporting events organized, particularly in the prefectures of SaitamaOsakaHiroshimaKyoto and Kumamoto (but mainly in Tokyo ๐ŸŒธ), the Ecomarathon is recognized as an environmentally conscious organization ๐ŸŒณ and committed to various causes ๐ŸŽ—๏ธ. This year, it is possible to donate to the International Refugee Support Association : Second Harvest Japan. Japan's first food bank, the organization ensures that everyone has access to food ๐Ÿฒ. The associations Refugee Empowerment International and Peace Run also benefit from the event's proceeds. A great way to do good for others, the planet, and yourself! ๐Ÿซถ

Located not far from the bustling center of Tokyo, Horikiri is renowned for combining modernity and greenery ๐ŸŒฑ. You can easily find a park or a quiet picnic area to enjoy a moment with your family! ๐Ÿฅฐ To learn more about the city and Japanese culture, the Shibamata Taishakuten Temple will welcome you ๐Ÿ—ฟ. If you're visiting for the day, Tokyothe capital of the country, is only 30 minutes away. Whether you are interested in traditional culturefashioncuisine ๐Ÿฅข or simply the excitement of urban life, you won't be disappointed! ๐Ÿ˜‰

Do not miss this opportunity to combine sports, nature, and cultural discovery in a beautiful region of Japan ! ๐ŸŽ Register now and prepare for an unforgettable experience at the Horikiri Ecomarathon ๐ŸŽ.

4 reasons to join this race

Discover Japan ๐Ÿ‡ฏ๐Ÿ‡ต
If you have never been to Japan, running the Horikiri Ecomarathon is the perfect opportunity to explore this country that seamlessly blends tradition and modernity at all times. If you decide to extend your stay, we invite you to explore the eastern part of Tokyo. With traditional gardens ๐Ÿฏ and city temples, you won't be bored ๐Ÿ˜….
Taste Japanese specialties ๐Ÿฑ
Here are some specialties you are sure to see if you pass by street stalls ๐ŸŽ. Koppe pan is one of the three main desserts in Katsushika Ward. Tea is a must in the region, and if you're lucky, you might have the honor of witnessing the famous tea ceremony ๐Ÿต.
Immerse yourself in Japanese culture ๐Ÿซฐ
Like most regions in Japan, Tokyo Prefecture is prominently featured in manga and anime ๐Ÿ–ฅ๏ธ. But it is also very active in the cultural world: Katsushika Ward is the birthplace of Hokusai, the famous printmaker typical of the country โœ๏ธ.
An easy, flat, and fast course โšก๏ธ
You might be surprised by the ease and speed of the 10 km course. Indeed, it is perfect for beginners and those hoping to achieve records ๐Ÿ†. If you hope to spend a Sunday with your family, a parent-child race is organized for children under 15 ๐Ÿง‘โ€๐Ÿง‘โ€๐Ÿง’โ€๐Ÿง’.

A distance for every taste

Frequently asked questions (FAQ)

The race start will be at 11 AM on March 29, 2026, at Horikiri Waterside Park, next to Horikiri Shoubuen station.

Bib pickup will take place on site on the day of the race from 9:30 AM to 10:30 AM.

You will find a baggage storage area on site (but no lockers, so you will be entirely responsible for your valuables). Remember to bring a 45L garbage bag to protect your belongings in case of rain.

  • Semi: the time limit is 3 hours

  • 10 km: the time limit is 1 hour and 30 minutes

If you have any other questions, you can contact the organizers at the following email address: ecomarathon@runningtokyo.com

You can check the race rules here