About the "back number app"

The "back number app" won't open. (It force closes/returns to the home screen)

「back number アプリ」を起動後、すぐに強制終了してしまう場合は、一度アプリをアンインストールしていただき、再度【App Store／Google Play】よりインストールし直してください。

再インストール後もアプリが起動されない場合は、お問い合わせください。

Other questions about the "back number app"

• Q.
  What is the "back number app"?
• Q.
  Is the "back number app" a paid app?
• Q.
  I cannot log in to the "back number app".
• Q.
  Can I still use the "back number app" after changing my phone model?
• Q.
  When you log in using the "back number app," "[Not Registered]" will be displayed on your My Page.
• Q.
  If I delete the "back number app," will my fan club registration be canceled?
• Q.
  Is phone number verification required for the "back number app"?
• Q.
  I am unable to complete SMS authentication/identity verification for the "back number app".
• Q.
  Could you please tell me about the push notification settings for the "back number app"?
• Q.
  Regarding inquiries about the "back number app"

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