The Osaka Castle Triathlon is a unique urban triathlon set within the historic Osaka Castle Park. Athletes swim in the iconic Osaka Castle East Outer Moat surrounded by ancient stone walls, cycle through the park and city streets, and run with views of the magnificent castle. The 2026 edition hosts the Asia Triathlon Cup (elite sprint) and age group races in sprint and standard distances.
Date
May 31, 2026
Location
Osaka, Osaka, Japan
Sport
Triathlon
Website