MNP is short for Mobile Number Portability.
It’s a system that you can bring your phone number to another service provider.
You can request the MNP reservation number from your current provider (Docomo, Au, Softbank retail shops, or online customer support) and bring it to us to continue using your phone number with us.
We need the MNP to have more than 8 days before it expires when you sign up.
Request MNP number from Docomo
Request MNP number from Au (In Japanese only)
Request MNP number from Softbank (In Japanese only)
We can also provide an MNP number if you would like to switch from us to a different provider.