A memorial swimming festival held by the "Suiryu Preservation Society," the group maintaining the Takamatsu City's Intangible Cultural Property "Suiryu Swimming Method." To honor the first lord of the domain, Matsudaira Yoritomo (posthumous name: Eiko), who practiced aquatic training as part of martial arts since 1643, and is said to have swum in the moat of Takamatsu Castle. The event showcases various Suiryu swimming techniques, which have a history of about 380 years, to the public. Fee: Free viewing (additional admission fee required for Tamamo Park) Event Date: June 1, 2025 (Sunday) 10:00-11:30 (subject to change) Summer Held annually on the first Sunday of June Cultural Property Other City Designated Intangible Cultural Property Designation Year: 1979 Venue: Moat inside Tamamo Park