This is the highest level of domestic cricket for females in Japan. Matches are 20 overs and designed to provide an opportunity for players in and around the Japan National Squad to compete against each other in competitive environments.

These days will often be scheduled in conjunction with the J-BASH Social events so that an opportunity to watch women’s cricket in its top format is provided for those who want to learn about cricket.

It is also hoped that former national squad representatives can return to feature in these days to provide their experience and expertise to the younger group of Japan National Representatives.