Diary and Calendar Listing of Mass Participation Multi Sports Events in Japan. Japan Marathon. Japan Half Marathon. Japan Triathlon. Cycle & Run Tours in Japan.
Marunuma Swim Run Race 2019 (Gunma Prefecture) Date held August 24, 2019 25th Venue Gunma Prefecture Tone-gun Nikko National Park Competition Details A combined competition of 3 to 10 km in open water and 15 to