plan change
Please apply using the dedicated application form.
Rate plan
(1,408 yen including tax)
(1,958 yen including tax)
(2,508 yen including tax)
(3,058 yen including tax)
(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.
- 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.
Overview of Date Mori
- Eligibility is automatically applied.
- Applies to the whole family.
- Surplus data capacity can be carried over.
- For eSIM (A Plan SU), this only applies if J:COM personal ID and subscriber ID are the same.
View J:COM MOBILE Plan A (Smartphone Set/Long-Term Type S)
| Data capacity | 1 GB | 5GB | 10GB | 20GB |
|---|---|---|---|---|
| Rates valid until September 30, 2026 |
980 yen (1,078 yen including tax) |
2,980 yen (3,278 yen including tax) |
3,980 yen (4,378 yen including tax) |
4,980 yen (5,478 yen including tax) |
| Rates effective from October 1, 2026 |
1,280 yen (¥1,480 including tax) |
1,780 yen (¥1,958 including tax) |
2,280 yen (¥2,508 including tax) |
2,780 yen (¥3,058 including tax) |
- Starting in October 2026, we will be revising the monthly fee for J:COM MOBILE Plan A (Smartphone Set/Long-Term Type S).
With this change, our "Spam Call and Message Blocking" service, currently offered as an option, will be provided free of charge starting in October. Click here for details.
Please check My Page for the plan you are currently enrolled in.
Plan change flow
Check your current plan
You can check your current plan, billing amount, and device installment payment status on My Page or the MY J:COM app.
Click here to download the app
Apply online
Please use the dedicated application form to apply for a plan change.
J:COM Personal ID (contractor ID) is required. Please log in and complete the procedure.
If you have multiple lines, please contact us by phone.
Contact us by phone (toll free)
0120-938-362
9:00-18:00 [Open all year round]
eSIM plan change
How to change eSIM data capacity
If you want to change the data capacity of eSIM, please apply from the button below.
Those who change from SIM Card to eSIM
If you want to change from SIM Card to an eSIM, please apply by phone.
Contact us by phone (toll free)
0120-919-988
9:00-18:00 [Open all year round]
CloseContent confirmation/end of change
At a later date, we will contact you and carry out the procedures for the change.
Please apply using the dedicated application form.
Notes on changing plans
If you are subscribed to "J:COM MOBILE A Plan" and want to change from your current plan to "J:COM MOBILE A Plan ST/SU", there are some things to keep in mind.
- There are no contract cancellation fees or other fees associated with plan changes.
- Due to the plan change, the discount currently applied to "J:COM MOBILE A Plan" will end. Therefore, if you currently have a device discount applied to your device payment (when you sign up for a new subscription) and have an installment remaining, after you change your plan, the device discount will no longer apply and you will be able to pay the remaining device fee without any discount. Payment will be made.
- The new plan "J:COM MOBILE A Plan ST/SU" does not apply the smartphone more program, so you will not be able to use the half price assist after changing the plan.
[About the amount including tax]
- Consumption tax differences may occur due to changes in the consumption tax rounding method under the invoice system.
