back number one room app is the official app where you can check all the information.
We have released a revamped version.

In addition to being able to catch the latest information on back number,
Official fan club "one room" members can also access timely content such as movies and member blogs.

We want you to use the app in your daily life.
It also features a scheduling function that allows you to check back number 's schedule and your own.

*FC members only need to log in once; they will not need to log in again next time.

The download is free, so please give it a try!

[Note]

Depending on your environment, it may take some time for the update information to be reflected in the app store. In that case, please wait a while and check again.

≫Click here for app details and download