Mainland Karate was introduced to all of Japan from Okinawa in the 1920s and spread to the rest of the world after World War II. There are many styles of Mainland karate, but four of them, Shotokan-ryu, Goju-ryu, Shito-ryu, and Wado-ryu, are called the "Four Major Styles" and represent the styles of Mainland Karate. The styles are characterized by practices and matches based on traditional techniques, and the matches can be broadly divided into 'Kata demonstrations and 'Kumite. Kumite doesn't allow for head hits with punches or kicks stopping closely in front of the face, but there are groups that wear protective gear.