The J.League is the top professional football league in Japan, established in 1993. It features a system of promotion and relegation with the J2 League and J3 League. The league consists of 18 teams that compete annually for the championship title. Matches are played from February to December, with each team facing others twice, once at home and once away. The league has gained popularity both domestically and internationally, showcasing talented players and teams. The Emperor's Cup and the J.League Cup are notable tournaments associated with the league, adding to its competitive spirit.