Sumo is the national sport of Japan and encompasses three core elements: mind (kokoro), spirit (ki), and body (karada). The sumo god of ki is enshrined and worshipped at Sumiyoshi Shrine. The yokozuna dohyo-iri dedication is an official ceremony in which a yokozuna (grand champion of sumo) enters the sumo ring. It is an official event held annually by the Japan Sumo Association before the Kyushu Basho. The event usually attracts more than 3,000 visitors and is free to all attendees. Official dohyo-iri events are held in only 5 locations in Japan.