Traditionally, sumo is considered Japan's national sport. Japanese martial arts such as judo and kendo are taught as part of the compulsory junior high school curriculum. Baseball is the most popular spectator sport in the country. Japan's top professional league, Nippon Professional Baseball, was established in 1936. Since the establishment of the Japan Professional Football League in 1992, association football has gained a wide following. The country co-hosted the 2002 FIFA World Cup with South Korea. Japan has one of the most successful football teams in Asia, winning the Asian Cup four times, and the FIFA Women's World Cup in 2011. Golf is also popular in Japan.