Thank you for using the "back number app" on a regular basis.

We have updated the app to include the addition of the "Commemorative AR Camera" and "Real-time Report 'moment'" features, which are part of the "Grateful Yesterdays Tour 2026" one room collaboration project.

To fully enjoy the related events for this tour, we kindly ask that you update both your iOS and Android devices to the latest version (ver 4.4.0).

Please note that the "Commemorative AR Camera" and "Real-time Report 'moment'" will be available within the app from 10:00 AM on Saturday, May 2nd. Participation in the project is not yet possible at this time.

Please wait a little longer until the project begins.