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Monthly fee

IIJmio, number one※1 share in low-price SIMs market share
Use your smartphone and tablets for less.

An internet-only SIM goes for as little as 900 yen a month.
We recommend for those are connecting their family and friends via SNS.

No restrictive two-year
contracts!
free
IIJmio features no restrictive contract periods.
Wide coverage area and
LTE high-speed data.
Wide coverage area
Compatible with NTTdocomo or KDDI wide radio networks, you can enjoy it in both rural and urban areas.※2

※2 Area coverage is affected by the frequency specifications of the handset.
Carry over unused data
to the next month.
Graph
The unused bundled data can be carried over to the next month. You need not worry about wasting bundles.
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Why can we offer with so low-price?

Because our service is no-frills.
Simplifying our service specifications, we can offer no-frills service with quite reasonable price.
Do you really need unlimited voice and text while SNS apps is installed in your phone?
Simple Service

Compatible smartphones/tablets

IIJmio’s low-cost SIMs can be used with many SIM-unlocked devices,
and NTT Docomo devices. sold in Japan, including iPhones.
If you would bring your own device, be careful you should check your device being unlocked.

device

A list of devices with performance confirmation(Japanese Only)

You can purchase SIM-unlocked smartphones or
tablets at IIJmio Web site, either with or without SIM contract.
Click here to purchase SIM-unlocked smartphones/tablets.
(written in Japanese)

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Price

price3GB Minimum Start Plan \1,600
6GB Light Start Plan \2,200
12GB Family Share Plan \3,260

※“Type D”is a service which uses NTT docomo LTE and 3G networks. SIM-unlocked devices or NTTdocomo's devices are compatible.
※“Type A”is a service which uses KDDI 4G LTE networks. SIM-unlock devices are only compatible. In addition, be aware your device must support au(KDDI) VoLTE or it could not work properly.
※3 From your second SIM on the Minimum Start Plan or the Light Start Plan, or your fourth SIM on the Family Share Plan onwards, additional SIMs are available after you begin using our service. Monthly additional SIM fee will be charged.

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How to order

Be ready all those below before you start the online procedure.

Address in Japan
E-mail address
(We'll send all necessary information to your email address)
Phone number in Japan
Credit card owned by the customer

Once you’re ready, you can start using IIJmio in three easy steps!

The application procedure is written about on blogs!The application procedure is written about on blogs!step1step1
step2step2
step3step3

Click here for details

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Q&A

  • Q
    Can I use full data bundle for the first month?
    A
    No. Both Data bundle and fee for the first month are on a prorated basis.
  • Q
    Can I change my price plan?
    A
    Yes.You can apply from the member’s page(written in Japanese). Your request of changing your price plan will apply in the following month.
    ※You can not make the application of changing your price plan at the last day of month.
  • Q
    I would change the contractor's name. Can I make this?
    A
    No, we do not accept the change procedure of contractor's name.
  • Q
    How do I order the additional SIMs?
    A
    You can apply from the member’s page(written in Japanese).
  • Q
    Does IIJ accept payment methods other than credit card?
    A
    No. We accept only credit cards for payment.
    In addition, credit cards issued by the foreign companies may not be acceptable.
  • Q
    How do I contact your support team for troubleshooting?
    A
    We provide customer support at IIJ support center by phone and web form. Please note that our customer support are provided only Japanese language.
    IIJ support center(everyday/9am to 7pm)
    TEL : 0570-09-4400
    If you can not call properly above, please try to call 03-5205-4400 (everyday/9am to 7pm)

    We provide the answer for your question except any kind of inquiries via Twitter @iijmio (English is available)

Our service was awarded as the No.1 ※4
Customer satisfaction in the low-price SIMs

Our service was awarded as the No.1  Customer Satisfaction Award as decided

IIJmio is the largest Japanese MVNO service for the consumers provided by Internet Initiative Japan, one of the pioneers of the Internet. For our 25 years history, we continued to provide innovative, secure, reliable and state-of-the-art services and solutions for enterprises, SMBs and governmental bureaus etc.

※4 MMD Institute "satisfaction investigation into SIM service bargain in March, 2016"

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※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.