It began on March 4 and ended on December 2. none The following eighteen clubs participated in J.League Division 1 during 2006 season.
Of these clubs, Kyoto Purple Sanga, Avispa Fukuoka, and Ventforet Kofu were newly promoted clubs.
Eighteen clubs will play in double round-robin (home and away) format, a total of 34 games each.
The clubs are ranked by points, and tie breakers are, in the following order: A draw would be conducted, if necessary.
League Division 1Notes:† Team played previous season in J2.