第10回 沖縄名護オープンウォータースイムレース

The 10th Okinawa Nago Open Water Swim is part of an open water swim series held in natural aquatic settings such as the sea and lakes. The event is listed for 21st Century Forest Beach in Nago, Okinawa Prefecture, placing the race in a coastal beach environment. The source describes the series as swimming competition using natural conditions as its field of play, and provides related series information such as photo galleries, annual athlete registration guidance, and contact support for race registration inquiries in English.