Four points for a win, two for a draw, one bonus point for four tries or more (BP1) and one bonus point for losing by seven or less (BP2).
If teams are level at any stage, tiebreakers are applied in the following order:
• Difference between points for and against
• Total number of points for
• Number of matches won
• Aggregate number of points scored in matches between tied teams
• Number of matches won excluding the first match, then the second and so on until the tie is settled
Fixtures and results[]
This section needs expansion with: Results Rd 1-11 (source top-league.jp). You can help by . (November 2013)
Microsoft Cup play-offs[]
The top eight teams in the league played off for the Microsoft Cup (2006) knock out tournament, which was won by Toshiba Brave Lupus.
Coca-Cola West Red Sparks and IBM Big Blue won promotion to the 2006–07 Top League via the 2006 Top League Challenge Series, while Honda Heat, Kintetsu Liners, Kyuden Voltex and NTT Communications Shining Arcs progressed to the promotion play-offs.
Promotion and relegation play-offs[]
Four promotion/relegation matches (Irekaesen) were played with the winner of each qualifying for the 2006–07 Top League. The 9th, 10th, and 11th placed team from the Top League played against the 3rd, 2nd, and 1st placed teams, respectively, from Challenge 2. The 12th placed team from the Top League played against the 3rd placed team from Challenge 1.