In 2009, to celebrate the 75th anniversary of American football in Japan, (and after all, we have, according to the KCFA yearbook "A CHALLENGE STARTS TO THE 100th ANNIVERSARY"!) the post-season schedule formats for the top university and shakai-jin leagues were altered to try to improve things. In the case of the shakai-jin X-League Division I that meant changing the format, dividing the season into two "stages". The First Stage concluded at the end of October.
The top 3 teams of the East, Central, and West divisions then were put into a pool to play each other in a Second Stage. The bottom 3 teams in each division did likewise. The goal was to was to create more balanced games later in the year. This makes more sense to me for several reasons. Perhaps greatest of all was that formerly, the (regular) season was over for most teams early in November. In most parts of Japan September suffers from the oppressive heat of summer giving way to taiphoon season. In Tokyo, some of the best football weather of the year comes in November and December. This gave us more games (and hopefully more evenly-matched games) that could be played and viewed in comfort.
There may have been some question as to whether those 3rd place teams actually belonged this year- they were mostly trounced by the higher placed teams- but this is obviously a work in progress. Each team played two games against their 2nd Stage pool. Then 4 teams were chosen to represent the divisions, along with a wild-card team (this year the Kajima Deers) based on their combined record in the two stages.
Nevertheless, the semi-finals will be played on December 5th (at Nagai)- a rematch of last year's X-Bowl (Kajima versus Panasonic), and December 6th (at Yokohama Stadium), where the Fujitsu Fronteirs will take in the Asahi Beer Silver Stars. Kickoff for both games will be at 14:30.
The winners of those games will meet on Monday evening, December 21st at Tokyo Dome, for the 23rd X-Bowl.