ISA: International Surfing Association Unveils Host Cities for Two Premier World Events in 2018 0 08 Dec 2017 09:04 Playak The International Surfing Association (ISA) has unveiled Tahara, Japan and Buzios, Brazil as the host cities of two of its flagship events, the 2018 ISA World Surfing Games and the 2018 ISA World SUP and Paddleboard Championship , respectively.