Format
In the 2004 season, the league was conducted split-season format, 1st Stage and 2nd Stage. In each stage, sixteen clubs played in a single round-robin format, a total of 15 games per club (per stage). A club received 3 points for a win, 1 point for a tie, and 0 points for a loss. The club were ranked by points, and tie breakers are, in the following order:
- Goal differential
- Goals scored
- Head-to-head results
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. The first stage winner, hosts the first leg in the championship series. If the a single club win both stages, the club is declared the season champions and championship series will not be held. Meanwhile the last-placed (16th-placed) club must play Pro/Rele Series at the end of the season.
- Changes in Competition Format
- No direct relegation this year, due to expansion of Division 1 in the following season
- Last-placed (16th placed) club plays Pro/Rele Series at the end of the season
Read more about this topic: 2004 J. League Division 1