League promotion/relegation series on December 4 and 12. none The following sixteen clubs participated in J.League Division 1 during 2004 season.
Of these clubs, Albirex Niigata and Sanfrecce Hiroshima were newly promoted from Division 2.
The club were ranked by points, and tie breakers are, in the following order: A draw would be conducted, if necessary.
The club that finished at the top of the table is declared stage champion and qualifies for the Suntory Championship.
Yokohama upset the home club in the penalties winning them and series overall.