第2回 西海国立公園五島列島オープンウォータースイム

The Saikai National Park Goto Islands Open Water Swim is an event in the Open Water Swim Series held at Takahama Beach on Fukue Island in Goto, Nagasaki Prefecture. The series is described as swim competition staged in natural environments such as seas and lakes, rather than in a pool setting. This event places that format in the Goto Islands, using the coastal setting of Takahama Beach as the race venue. Based on the provided source, it is an outdoor open-water swimming event where participants swim in a natural body of water and contend with the conditions of the sea environment.