2006–07 Top League

The 2006–07 Top League was the fourth season of Japan's domestic rugby union competition, the Top League. The league was expanded to from 12 to 14 teams for the 2006–07 season. The top four teams in the league played in the Microsoft Cup which was officially integrated into the league from this season as the "Top League Play-off Tournament Microsoft Cup". The title was won by Toshiba Brave Lupus which also won the All-Japan Championship.

2006–07 Top League

The 2006–07 Top League was the fourth season of Japan's domestic rugby union competition, the Top League. The league was expanded to from 12 to 14 teams for the 2006–07 season. The top four teams in the league played in the Microsoft Cup which was officially integrated into the league from this season as the "Top League Play-off Tournament Microsoft Cup". The title was won by Toshiba Brave Lupus which also won the All-Japan Championship.