The Marathon Festival in Showa Kinen Park Flower (マラソンフェスティバル in 国営昭和記念公園 FLOWER) is a popular spring running event held in Showa Kinen Park in Tachikawa, Tokyo, Japan. Organized by the Marathon Festival Executive Committee, the event combines recreational road running with one of Tokyo's most spectacular seasonal flower displays. Participants race through the expansive national park while surrounded by blooming cherry blossoms, tulips, canola flowers, nemophila, and other vibrant spring flowers that make the annual Flower Festival one of the capital's premier seasonal attractions. The event typically features multiple race distances—including a half marathon, 10 km, 5 km, and family races—making it accessible to runners of all ages and abilities. The park's wide paved roads, gentle terrain, and beautifully landscaped gardens provide a unique race setting unlike traditional city marathons. Showa Kinen Park
The event offers runners the opportunity to experience one of Japan's largest urban parks at the height of spring. The half marathon course loops through the park's diverse landscapes, passing expansive lawns, wooded areas, lakes, and world-famous flower gardens. Participants enjoy a relaxed atmosphere, excellent race organization, and the chance to combine racing with flower viewing after crossing the finish line. Conveniently located in western Tokyo, Showa Kinen Park is easily accessible by public transportation, making the Marathon Festival an ideal destination for both local runners and visitors seeking a scenic spring race. The combination of colorful floral displays, family-friendly activities, and pleasant running conditions has made the event one of Tokyo's signature spring road races.
