japan women's football league began in 1989. from 1993 to 1999 it adopted an apertura and clausura system, similar to the j.league system of that era. from 2000 to 2003 the clubs were divided into east and west groups and then the top clubs of each would go into a championship group, with the bottom clubs in a relegation group. in 2004 the single-table format was brought back.