According to Sankei Sports, the couple are planning to register their marriage on the 4th. The source says Matsuura visited Hawaii back in June to look over the location for the wedding ceremony beforehand, and it will be held there sometime this fall, probably after October. A person close to the couple revealed that the wedding ceremony will be a small one since they are inviting mainly family members.
Both Tachibana and Matsuura made their debut in 2001, and they started their relationship right after their debut. Apparently, they began living together starting last year.
One of the reasons why they decided to get married could be that Tachibana seems to be fulfilling his life at work, as he made his solo debut as KEITA this year, along with his activities in w-inds.. On the other hand, Matsuura, who revealed that she has been diagnosed with endometriosis since 4 years ago, has been setting a limit to her activities for a little more than a year.
Reportedly, Matsuura will continue restricting her activities for a while after the marriage as well.
It is expected that there will be an official announcement from the couple soon, so stay tuned!