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Information about MNP (Mobile Number Portability)

You can switch to au from another carrier without changing your phone number. Switch to au! Information about procedures for MNP (Mobile Number Portability) when switching to au from another carrier and post-switch support is provided.
By switching over from another carrier, monthly charges are ¥0 for 2 years "Welcome Discount"

To switch from another carrier to au, it's "Two Simple Steps!"

STEP1 現在ご契約中の携帯電話会社で MNPの予約お申し込みを行い、「MNP予約番号」をお受け取りください。

STEP2 Take the "MNP reservation number" to any au dealer and sign up for a new contract. *The MNP reservation number is only valid for 15 days including the day on which the number is obtained.

Customers who want to switch right away, click here

Connect! Save! Choose! many options with au!

Connect!

Easy to connect anytime, anywhere.

Click here for details (in Japanese only)

Save!

Set up your home phone and internet as a set, and from your smartphone charged fees Every month for up to 2 years ¥1,480 discount!

Click here for details

Student Discount Monthly basic charges for students (switching from another carrier or applying for a new contract) and their families (switching from another carrier) are ¥0 for 3 years For families (applying for a new contract), it is ¥0 for 1 year

Click here for details (in Japanese only)

Welcome Discount Monthly basic charges are ¥0 for 2 years by switching from another carrier  (¥980/month discount x 24 months)
All the smartphone models are eligible!

Click here for details (in Japanese only)

A complete lineup, from the latest smartphones to easy-to-use mobile phones!

Click here for the iPhone

A complete lineup, from the latest smartphones to easy-to-use mobile phones!

Click here for the product lineup

Click here for how to apply

Notes on using MNP

Once MNP is implemented, the contract with your current mobile phone carrier shall be canceled and you will sign a new contract with a different mobile phone carrier (new contract). Accordingly, please note the following points:

  • There is no transfer charge incurred when transferring to au through MNP, but a new contract fee of ¥ 3,150 is required.
  • The email address issued by the currently contracted mobile phone carrier will no longer be available. For au, the new address will be ****@ezweb.ne.jp. It is possible to set a combination of single-bite alphanumeric characters of your choosing for the ****.
  • Services offered by the currently contracted mobile phone carrier (rate plans, discount services, etc.) shall be terminated at the time of the cancellation of the contract.
  • In some cases, content and electronic money provided by content providers may not be transferred to the new mobile phone.
  • If you subscribe to discount services such as a yearly contract, additional costs may be incurred with the cancellation of the contract.
  • A mobile phone handset released by the newly signed-up mobile phone carrier will be required.
  • Changing from the currently contracted mobile phone carrier throughMNP will incur exit charges.
  • MNP is not applicable to services providing data communication only (Single Service).

Inquiries about MNP

From an au phone or general phone freecall 0077-75470 (Charge free)
Business hours 9:00-20:00