Category: 未分類

Updated: February 2, 2026 The entry deadline was originally set for January 31; however, as the Standard category has not yet reached capacity, the entry period has been extended until March 31. Please note that registration for the Sprint category is now closed. The entry will close as soon as the category reaches capacity, so […]

Updated on March 5, 2025 We are pleased to inform you that ROAD BIKE RENTAL JAPAN has kindly provided a bike rental support package for the 2025 Osaka Castle Triathlon. Please refer to the flyer below.

Updated May 25, 2025 The finisher certificates have been issued. Please download yours from here.The race results have also been published, so please check them as well.

May 14, 2025 At 12:00 noon today, we sent an email to your registered email address with a link to your My Page. From there, you can take the confirmation test. Please make sure to pass the test before the day of the event. If you did not receive the email, please log in from […]

Updated on March 5, 2025 We are pleased to inform you that ROAD BIKE RENTAL JAPAN has kindly provided a bike rental support package for the 2025 Osaka Castle Triathlon. Please refer to the flyer below.  

Updated on January 15, 2025 The Osaka Castle Triathlon Organizing Committee (composed of Osaka City, the Japan Triathlon Union, and the Osaka Triathlon Association) has decided to hold the “Asia Triathlon Cup (2025/Osaka Castle) / Osaka Castle Triathlon 2025” on Sunday, May 25, 2025 (Reiwa 7). Additionally, registration for participants in the Age Group event […]