The Steps To Using ANSIM

  • Keep using the same phone number
  • Apply for a new phone number
  1. This page explains the steps required to switch from the mobile phone company you currently use to ANSIM using Mobile Number Portability (MNP) - allowing you to keep using the same phone number.

    1. Points to confirm

    • You won't be able to use your mobile phone carrier's email address (e.g. @docomo.ne.jp, @softbank.ne.jp, etc.).
    • You won't be able to use "Osaifu-Keitai", "au Smart Pass" and other systems provided by mobile phone companies.
    • You need to be over 18 years of age.
    • You need to supply details of a credit card in your own name.
  2. 2. Please get a MNP reservation number

    • Get it by phone

      NTT Docomo contact numbers
      If calling on a mobile phone: 151
      If calling on a land line: 0120-800-000
      (Daily 9am to 8pm)
      au contact numbers
      If calling on a mobile phone or land line: 0070-75470
      (Daily 9am to 8pm)
      softbank contact numbers
      If calling on a mobile phone or land line: 0800-100-5533
      (Daily 9am to 8pm)
    • Get it online

      NTT Docomo Web page (in Japanese only)
      Access the "My docomo" page.
      Access "Kakushu Omoushikomi・Otetsuduki".
      https://www.nttdocomo.co.jp/mydocomo/
      au Web page (in Japanese only)
      Access "au Okyakusama Sapouto" then "Moushikomi/Henkou Suru".
      softbank Web page (in Japanese only)
      Access "My SoftBank" then "Kakushu Henkou Tetsuduki".
    • If you are using another mobile phone carrier, please contact them.
    • Please confirm the method of getting a MNP reservation number with the mobile phone carrier you currently use.
  3. 3. Prepare to make your application

    Have This Ready In Advance

    Please supply one of the following documents.

    • Japanese driver's license
    • Japanese Health Insurance Certificate
    • Japanese passport
    • Residence Card or Certificate of Alien Registration
    • Special Permanent Resident Certificate
    • Basic Resident Registration Card
    • Physical Disability Certificate

    A Credit Card In Your Own Name

    The credit card you supply must be a credit card in your own name.

    • You need to apply online and so need access to the Internet.
    • You won’t be able to continue using the email address supplied by your current carrier, so please prepare to use a Gmail address or other email address you use often. This email address will be used for the purpose of confirming your identity.

    Simple signup will only take a minute!

    Asahi Net English Support
    03-6631-0861
    Lines open
    10am to 5pm, weekdays (excluding holidays)
    • Member Apply

      Your Asahi Net User ID and password are required.

    • Join Apply
    • Member Apply
    • Join Apply
    Make your inquiry in English
    03-6631-0861
    Lines open 10am to 5pm, weekdays (excluding holidays).
  4. 4. Processing of your Identity Verification Document

    Within about 15 minutes of completing your application, you will receive an email asking for verification of your identity.
    Follow the steps outlined in the email to upload your identity verification document.

    Confirmation of your identity

  5. 5. ANSIM is delivered to you

    ANSIM will be delivered to the postal address that appears on your identity document in a minimum of 3 days from verification of your identity document.

    • The delivery company who will make the delivery is Yamato Transport Co., Ltd.
    • For your security, ANSIM will be delivered to the postal address that appears on your identity document, and forwarding will not be possible.
  6. 6. One final step

    Log in to the Asahi Net Account Maintenance page and click the button to start using the service.

    • You may use ANSIM after about 1 hour from doing this. However, should you do this after 5pm, you will need to wait until the following day before you can use ANSIM.
    • After completing the steps to use the ANSIM service, you will no longer be able to use the SIM card of the mobile phone carrier from which you switched to ANSIM.

    Account Maintenance page

  7. 7. Start using the service

    Refer to the configuration guide supplied with ANSIM and make any essential settings, then start using the service.
    It is also possible to view the guide on this Asahi Net LTE (ANSIM) Configuration Guide Web page.