MNP stands for Mobile Number Portability. It allows you to transfer your phone number to another service provider.
You can request an MNP reservation number from your current provider (such as Docomo, au, or Softbank, either at retail shops or through online support) and bring it to us to keep your phone number when switching.
We require that the MNP number has at least 8 days remaining before expiration when you sign up with us.
Request MNP number from Docomo
Request MNP number from Au (In Japanese only)
Request MNP number from Softbank (In Japanese only)
If you wish to switch from us to another provider, we can also issue an MNP number for you.