High Quality Content by WIKIPEDIA articles! The X-League is a semi-professional American football league in Japan. IT was founded in 1971 as the Japan American Football League. IT changed its name to the X-league in 1997. THere are four division (X1, X2, X3, and X4) between which there is promotion and relegation. TEams in the four-tier league are split into east, west, and central divisions. THere are two types of teams, one being a company-team which only employees of that particular sponsoring company may participate as a player, and the other classified as a club-team for which anyone can tryout.