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Step by Step instruction



Credit card owned by a customer pointWe only accept your own credit card for payment.Be aware that we don't accept the other's credit card.
Environment to connect to the Internet Customers need an Internet connection in order to apply from home.
Email address We can accept a free email address such like Gmail and Yahoo! Mail.
Acquire the MNP reservation number
※ Only when you want to keep your current phone number(Mobile Number Portability)
point To get MNP reservation number from your mobile operator by telephone
To get your MNP reservation number at your mobile operator's shop.

You can ask your mobile operator's shop staff to have your MNP reservation number.

  • <Important Points to Note  [Applications Under a Different Name]>
  • ・When the names on the contract differ for each line that you are currently using with the carrier before transfer at the time that you transfer an MNP to IIJ, you can change the name of the existing contract holder ("transferor" below) to the new name on the contract ("transferee" below) and collectively apply under the same plan. *This is only possible when applying for a new plan. You may not collectively apply under an active plan for an IIJ service that you are already using.
  • ・Along with the completion of line opening procedures, the name on the line will be changed to the transferee (contract owner).
  • ・The transferee will become obligated to pay initial fees as well as the basic monthly fee, call charges, etc. for each line.
Identification documents
※Only for voice capable SIM
Be sure to check the necessary identification documents for signing a contract.
We check your identification document as requested by law.

※When the names on the contract differ for each line that you are currently using with the carrier before transfer at the time that you transfer an MNP to IIJ,the contract and line holder needs ldentification documents.
Pick a smartphone model and check the size of the SIM card point Depending on the smartphone, the size of the SIM card varies. It is best to pick the smartphone you like and check the size of the SIM card!
Compatible device list.(Written in Japanese)
Select the price plan Select from three plans as your requirement of monthly data amount.
SIM with Data, SMS and Voice(miofone)
Date-only SIM
Applying in the web page
Select your preferred service and enter personal information through “Apply to start service.”
Please click the green button below and apply.
Many bloggers have posted about how to apply.

When applying for a SIM with Data, SMS and Voice

Personal identification procedures (image upload).

After applying online, please upload the image of your identification document by following the instructions on the confirmation email that will be sent to you.

Personal Identification Procedures

We deliver the SIM.
After your application has been completed, an SIM card will be delivered via transfer-prohibited mail to the contract holder for each line that you are currently using with the carrier before transfer.
If there are no issues with the application, we will send your SIM no more than 3-4 days* after personal identification is completed. When applying for a smartphone at the same time, the SIM card and the device will be sent together.
※Delivery may take longer if a weekend or public holiday falls within the period, or you live in a remote island etc.
・ We will send you advance notification of the scheduled delivery date by email.
・ The date that charges start being incurred will be set as the scheduled delivery date. The monthly fee and voice call function fee (for SIMs with voice call functionality) will be calculated on a daily pro-rata basis for the first month of use.
・ The bundled data is also calculated on a daily pro-rata basis for the first month of use.
Settings and start
Insert your SIM into the handset as following the manual of the handset, and configure connection settings (APN settings).

In the case of voice capable SIM and switching telephone number from mobile operator(Mobile Number Portability)

In the case of an Mobile Number Portability, it is necessary to activate your SIM by telephone as following the instructions below in addition to APN settings.(written in Japanese)
※ Please activate your SIM by the day prior to the expiration date of your MNP reservation number.
※ If you do not activate your SIM till the expiration date of your MNP reservation number, your SIM will be automatically activated during the day of expiration date.

Steps of the activation

1.Call "IIJmio On Demand Activation Center"

0120-711-122(toll free, every day 9am to 7pm)(All guidances are only Japanese)

※ Public telephone or any other phones which is not capable of caller ID notification is not acceptable.
※ IP phone or any other phones which is not capable of calling toll free number is not acceptable.
2.You will be asked total three times to enter the number by the guidance.
First time: Select the number for the type of procedure. Please enter "2"(to activate the Mobile Number Portability).
Second time: Please enter the 11-digit phone number you wish to activate.
Third time: Please enter the last four digits of the SIM card’s ICCID (identification number).
3. Once this procedure is completed, your current line will be deactivated and terminated for about 10 minutes, and then your new SIM card will be activated. Please insert your SIM into the handset to use.


  • Subscribers must be 18 years old or older than 18 years old. If the subscriber is 18 or 19 years old, the consent from a person with parental authority (legal representative) is required.
  • Each customer may subscribe up to five SIMs with the voice capability.
  • In accordance with the Mobile Phone Improper Use Prevention Act, identification documents such as driver’s license, passport issued by the Japanese Goverment(A supplementary personal identification document is also required) and health insurance ID card, are required for identification.

※All prices are shown exclusive of tax.

※Products names, company names and company’s trade names and trademarks provided here are registered trademarks.

※Please note that the body texts do not display TM, (C)marks.