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Data Mori

Date Mori 5GB: Increased data when bundled with a smartphone and JCOM service.

New customers

New Customers
Sign Up

Current customers

Current Customers
Various procedures

Troubleshooting/
Inquiries
(Chat)

Smartphone fee
simulation

How to apply

[For current customers] We are currently receiving an increasing number of inquiries regarding Date Mori.
Please click here to check whether Date Mori applies and your usage status.

Won two awards for communication quality satisfaction

No. 1 in communication quality satisfaction

Source: MMD Research Institute's "September 2025 MVNO Market Share and Satisfaction Survey." A survey of main users (150 people each) of seven low-cost smartphone companies, comparing satisfaction scores for communication quality. Survey period: September 12th to September 21st, 2025.

Contracts for smartphones and other services

More data! Date Mori | 5GB: 980 yen (1,078 yen including tax)/month

Overview of Date Mori

Eligibility is automatically applied.
Applies to the whole family.
Surplus data capacity can be carried over.

Target audience
Those who subscribe to J:COM MOBILE and other J:COM services (television, internet, Landline, electricity). For eSIM (A Plan SU), J:COM Personal ID and Contractor ID are the same.

Target audience

Those who subscribe to J:COM MOBILE and other J:COM services (television, internet, Landline, electricity).

For eSIM (A Plan SU), J:COM Personal ID and Contractor ID are the same.

Price details by data volume

Extra 10GB is a great deal!

monthly fee

Data capacity

1GB

5GB

10GB

20GB

50GB

5GB

10GB

20GB

30GB

60GB

monthly fee

1,280yen
(1,408 yen including tax)

1,780yen
(1,958 yen including tax)

2,280yen
(2,508 yen including tax)

2,780yen
(3,058 yen including tax)

3,480yen
(3,828 yen including tax)

Data Carryover	Any unused data will be used the following month. Automatically carry over

Block nuisance calls and messages	attention! free *Settings in the app are required to start using the service.

Voice calls (domestic calls)	Unlimited calls (5 minutes/call) 500yen (550 yen including tax) Unlimited calls (60 minutes/call) 1,500yen (1,650 yen including tax) Domestic calls: 20 yen (22 yen including tax)/30 seconds

Separate charges apply for the broadband universal service fee, telephone universal service fee, telephone relay service fee, call charges, SMS communication charges, etc.
A contract administration fee of 3,000 yen (3,300 yen including tax) is required (excluding A Plan SU). However, if you sign up for other J:COM services at the same time, the contract administration fee for J:COM MOBILE may be waived.

With Date Mori, 1GB will be increased to 5GB, 5GB will be increased to 10GB, 10GB will be increased to 20GB, 20GB will be increased to 30GB, and 50GB will be increased to 60GB. See here for applicable conditions.

Other
full of happiness

POINT 1Data Date Mori
Suitable for the whole family!

For eSIM (A Plan SU), this only applies if J:COM personal ID and subscriber ID are the same.

POINT 2The remaining data capacity is
Carryover OK^*1

Surplus data capacity can be carried over

POINT 3 Even after speed limit,
Fast at up to 1 Mbps^*2!

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.

You can enjoy videos, music, and SNS crisply!

Procedure method

Please select the service you are using

J:COMでモバイルを利用している

We are using

not using

You use one of the following services:
(Electricity, Internet, WiMAX, TV, Phone)

We are using

not using

Step.1Applyfor mobile

J:COM MOBILE Application

Click here for the application flow

To apply for Date Mori, the address on your TV, internet, phone, electricity, or power contract must be the same as the address on your mobile phone contract identification document.

Step.2Procedure completed!

If you subscribe to mobile and eligible services, Date Mori will be applied automatically.

Step.1Applyfor services that apply Date Mori

Step.2Applyfor mobile

J:COM MOBILE Application

Click here for the application flow

To apply for Date Mori, the address on your TV, internet, phone, electricity, or power contract must be the same as the address on your mobile phone contract identification document.

Step.3Procedure completed!

If you subscribe to mobile and eligible services, Date Mori will be applied automatically.

Applicable condition

About Date Mori

overview
By subscribing to J:COM MOBILE and any one of the applicable J:COM services (TV, NET, PHONE, WiMAX, electricity), your mobile data capacity will be increased as follows. 1GB → 5GB 5GB → 10GB 10GB → 20GB 20GB → 30GB 50GB → 60GB
Target audience
User the applicable J:COM service and "J:COM MOBILE A Plan ST/SU (voice + data) (hereinafter referred to as the designated plan)". For A Plan SU, those whose J:COM Personal ID and Contractor ID are the same as of the end of the month. It may not apply depending on the contract plan and contract details.
Apply
If you are newly subscribed to a designated plan, the monthly data volume will be reduced approximately from the 1st to the 10th of the month following the line opening (for those who have switched plans, the month following the completion of switching, and for those who subscribed by switching to the MNP line, the month following the completion of the MNP line switching). Increase. If you are a new subscriber to an eligible J:COM service, the installation work will be completed (delivery will be completed if the customer installs it yourself, or switching will be completed if you use J:COM DENRYOKU / J:COM Affiliated Electricity/ J:COM Denki) for the following month. Increase the dose around days 1 to 10. Applicable to up to 5 lines per household. The data capacity that can be held is up to 100GB. Click here for details J:COM DENRYOKU / J:COM Affiliated Power/ J:COM Denki may not be applicable depending on the building's contract status.
please note
If you cancel all the target services or the designated plan, the increase will end. Fees/initial costs are required to use J:COM MOBILE and change services. Products and discount/gift contents and period are subject to change without notice.

overview

By subscribing to J:COM MOBILE and any one of the applicable J:COM services (TV, NET, PHONE, WiMAX, electricity), your mobile data capacity will be increased as follows.

1GB → 5GB
5GB → 10GB
10GB → 20GB
20GB → 30GB
50GB → 60GB

Target audience

User the applicable J:COM service and "J:COM MOBILE A Plan ST/SU (voice + data) (hereinafter referred to as the designated plan)". For A Plan SU, those whose J:COM Personal ID and Contractor ID are the same as of the end of the month.

It may not apply depending on the contract plan and contract details.

Apply

If you are newly subscribed to a designated plan, the monthly data volume will be reduced approximately from the 1st to the 10th of the month following the line opening (for those who have switched plans, the month following the completion of switching, and for those who subscribed by switching to the MNP line, the month following the completion of the MNP line switching). Increase.
If you are a new subscriber to an eligible J:COM service, the installation work will be completed (delivery will be completed if the customer installs it yourself, or switching will be completed if you use J:COM DENRYOKU / J:COM Affiliated Electricity/ J:COM Denki) for the following month. Increase the dose around days 1 to 10.
Applicable to up to 5 lines per household. The data capacity that can be held is up to 100GB. Click here for details
J:COM DENRYOKU / J:COM Affiliated Power/ J:COM Denki may not be applicable depending on the building's contract status.

please note

If you cancel all the target services or the designated plan, the increase will end.
Fees/initial costs are required to use J:COM MOBILE and change services.
Products and discount/gift contents and period are subject to change without notice.

Data Mori

Won two awards for communication quality satisfaction