Low-cost SIM

POINT 1I'm sure it's just right for you
5GB is 980 yen per month (1,078 yen including tax)~

monthly fee

Choose from 4 data capacities!
Data capacity 1 GB 5GB 10GB 20GB
Date Mori
When applied
5GB 10GB 20GB 30GB
Saikyo Young Wari
When applied


6 months

500 yen

(550 yen including tax)

6 months

1,000 yen

(1,100 yen including tax)

6 months

1,500 yen

(1,650 yen including tax)

monthly fee

980 yen

(1,078 yen including tax)

This price all the time!

1,480 yen

(1,628 yen including tax)

1,980 yen

(2,178 yen including tax)

2,480 yen

(2,728 yen including tax)

after speed limit
Data carryover Remaining data capacity will be used in the next month
carry over automatically
voice call
(domestic call)

Unlimited calls (5 minutes/time)

500 yen
(550 yen including tax)

Unlimited calls (60 minutes/time)

1,500 yen
(1,650 yen including tax)

Domestic call 20 yen (22 yen including tax)/30 seconds
  • 1GB is 5GB with Date Mori data, 5GB is 10GB with additional data, 10GB is 20GB with additional data, and 20GB is 30GB with additional data. Click here for applicable conditions
  • Separate universal service fees, telephone relay service fees, call charges, SMS service charges, etc. are required.
  • The monthly fee will be the price after Saikyo Young Wari application ends.
  • A contract administration fee of 3,000 yen (3,300 yen including tax) is required. (Excluding Plan A SU) However, if you subscribe to other J:COM services as a new or additional service at the same time, J:COM MOBILE's contract administration fee may be waived.
  • Click here for the application conditions for Saikyo Young Wari

contract cancellation fee

contract period binding

WEB application only
No initial cost

Unlimited calls pack

Unlimited calls and data capacity
Combine this amount!

Easy ♪ pack

1,480 yen per month
(1,628 yen including tax)

Data capacity 5GB*

Unlimited calls (5 minutes / time)

Perfect ♪ pack

1,980 yen per month
(2,178 yen including tax)

Data capacity 10GB*

Unlimited calls (5 minutes / time)


When 1GB is increased to 5GB and 5GB is increased to 10GB by applying Date Mori. Click here for applicable conditions
It is also possible to combine other data capacities and Unlimited calls.

Smartphone and set
Recommended for those who want to join!

Click here for product list

POINT 2 After applying for eSIM,
Open in as little as 60 minutes*

Open in 60 minutes

If you apply from 10:00 to 18:00, it can be opened in 60 minutes to several hours.
It may take several days to open depending on the application time, congestion, and examination status.

POINT 3 SIM Card is also a smartphone as it is,
Easy transfer

The SIM of your current smartphone,
Just change to J:COM SIM!

Step.1Turn off the power

turn off

Step.2Take out the old SIM

remove old sim

Step.3Inserta new SIM

insert new sim

from 3 major carriers
You can transfer as it is!

Current phone numbers, photos, apps such as LINE
data as it is Usable!

Some data may not be transferred

with your current smartphone
Check if it works!

With iPhone, it's even easier!
Just insert SIM

There is no need for troublesome settings on the smartphone side.

No setting required!

See available iPhones

Recommended as a set

If the device is released within 5 years, even if it is a used smartphone or a model purchased outside of J:COM it is covered.

POINT 4 Even after speed limit,
Fast at up to 1Mbps!*1

Even if the speed is limited when the data communication volume is exceeded, it can be used at a maximum of 1 Mbps.
Don't worry about using too much data.

videos, music, and SNS
Enjoy crispy!

Instagram Twitter Facebook

YouTube LINE iTunes

POINT 5The remaining data capacity is
Carryover OK*2

POINT 6 Easy on the web

If you apply online,
Even if you don't have to go to the shop and wait,
Complete the purchase process at home.

For SIM Card

Sign Up

Pick up SIM

Perform initial setup

For eSIMs

Sign Up

Receiving email

Perform initial setup

View application flow

If you are considering signing up or adding services

Sign Up information


Procedures such as contracting and changing models are cumbersome.

You can easily apply online. Visiting support is also available upon request.

You can apply for J:COM MOBILE online. You can complete the process from the comfort of your own home, so there is no need to go to a store and wait for a long time.

Once you receive your smartphone, you can receive free support if you wish. We will provide detailed instructions on how to use your smartphone, as well as the initial settings.

About initial setup support

  • Those applying for "J:COM MOBILE D Plan SIM Card" are not eligible.
Can I continue to use the email address I'm currently using on my J:COM MOBILE smartphone?

If you are using a free email service such as Gmail, you can continue to use it by logging in or setting up a new device.

Please note that if you are using an email address (domain) issued by some telecommunications companies, you will not be able to use it.

  • There are some services that allow you to continue using carrier mail even after canceling your carrier. Please refer here for details.

J:COM MOBILE does not issue email addresses, so we recommend that you switch to a free email such as G-mail in advance.

Can I carry over unused data usage?

Unused data traffic will be automatically carried over to the next month.

*The remaining amount is valid until the end of the following month.

If the upper limit is exceeded, the speed will be limited to 1Mbps or 200kbps depending on the plan you subscribe to. In addition to the data usage of your contract plan, you can also carry over any additional data usage you purchase to the next month.

Please check here for more information, including expiration dates.

Can I continue to use LINE on my new device?

By completing the appropriate settings and procedures, you can continue to use the service on your new device.

Regarding account migration (handover) procedures, security is regularly strengthened, so please check the latest information on LINE's official blog before proceeding.
(*Please note that settings may be required before changing the model)

How to transfer your LINE account (as of July 2017)

Does J:COM MOBILE have an "Unlimited calls" plan?

We offer an optional flat-rate call service, “Unlimited calls”.


With this service, domestic calls of up to 5 minutes or 60 minutes are free of charge as many times as you like.

Click here for details on "Unlimited calls"

  • 10GB/20GB (20GB/30GB after increase) plan
  • There is an upper limit to the amount of data that can be stored. If the remaining capacity reaches 100GB, additional data will not be given even if Date Mori is applied. Click here for details

[About the amount including tax]

  • Consumption tax differences may occur due to changes in the consumption tax rounding method under the invoice system.