2004 J.League Division 2
The 2004 J. League Division 2 season is the 33rd season of the second-tier club football in Japan and the 6th season since the establishment of J2 League.
In this season, twelve clubs competed in the quadruple round-robin format. Starting this season, promotion slots increased to 2.5 slots. The top two received automatic promotion and the third-placed finisher advanced to the Pro/Rele Series for the promotion. There were no relegation to the third-tier Japan Football League.
General
Promotion and relegation
To be completed
Changes in competition formats
To be completed
Changes in clubs
To be completed