Price plans (smartphones and SIM cards)
On J:COM MOBILE
Use your smartphone at a great price
With Date Mori
Increased monthly data volume!
Sign up for a smartphone and other services and get up to 10GB extra data for the same price!
Learn more
The expiration date for carried-over data charges is the end of the following month.
No need to worry about overused data in months
Even when speeds are limited due to exceeding your data plan, you can still enjoy videos, music, and social media with maximum speeds of 1Mbps *!
For 10GB/20GB/50GB (20GB/30GB/60GB after increase) plans
monthly fee
J:COM MOBILE A Plan ST/SU
6 months
(1,078 yen including tax)
(税込1,408円)
(1,628 yen including tax)
(税込1,958円)
(550 yen including tax)
(2,178 yen including tax)
(税込2,508円)
(1,100 yen including tax)
(2,728 yen including tax)
(税込3,058円)
(1,650 yen including tax)
50GB
(3,828 yen including tax)
(3,828 yen including tax)
(2,750 yen including tax)
50GB
(1,078 yen including tax)
(1,628 yen including tax)
(2,178 yen including tax)
(2,728 yen including tax)
(3,828 yen including tax)
(税込1,408円)
(税込1,958円)
(税込2,508円)
(税込3,058円)
(3,828 yen including tax)
（6カ月間）
(550 yen including tax)
(1,100 yen including tax)
(1,650 yen including tax)
(2,750 yen including tax)
- 2026年6月1日以降もセット割適用時の料金に変更はございません。割引期間終了後に新料金に移行となります。
セット割（J:COMモバイル）の適用条件はこちら
- 今回の変更に伴い、オプションにてご提供中の「迷惑電話・メッセージブロック」サービスを6月より無料でご提供いたします。詳しくはこちら
| Data Carryover | Any unused data will be used the following month. Automatically carry over |
|---|
| Voice calls (Domestic calls) |
Unlimited calls (5 minutes/call)
500yen Unlimited calls (60 minutes/call)
1,500yen 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.
- The monthly fee will be the price after the set discount (J:COM MOBILE) is no longer applied.
- 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.
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.
\Monthly fee is cheaper/
recommendation!
Unlimited calls pack
Unlimited calls and data capacity
Combine this amount!
Easy ♪ pack
1,480 yen per month
(1,628 yen including tax)
2026年6月以降
月額1,780円(税込1,958円)
Data capacity 5GB*
Unlimited calls (5 minutes / time)
Perfect ♪ pack
1,980 yen per month
(2,178 yen including tax)
2026年6月以降
月額2,280円(税込2,508円)
Data capacity 10GB*
Unlimited calls (5 minutes / time)
Starting in June 2026, the monthly fees for J:COM MOBILE A Plan ST/SU will be revised. For more information, click here.
When applying the data Date Mori, 1GB becomes 5GB, and 5GB becomes 10GB. Click here for the applicable conditions.
It is also possible to combine Unlimited calls with other data capacities.
other services
Children's plan
Your child's smartphone debut
whole thing Leave it to J:COM!
senior plan
Unlimited calls
Free for 3 months!
Varies according to use
About fees
We will inform you about call charges and SMS (a service that allows you to exchange messages using only a phone number) communication charges.
Click here for information on charges for various options and accessories such as unlimited Unlimited calls for 5 minutes, terminal guarantee, answering service, etc.
With this service, domestic calls of up to 5 minutes or 60 minutes are free of charge any number of times.
About data communication
Carryover OK
*The remaining amount is valid until the end of the following month.
Can be purchased online
The expiry date for additional data isPurchase date + 90 days
Highly secure Wi-Fi
Free to use
As a perk, you can use highly secure public wireless LAN (Wi-Fi) for free. It also comes with VPN protection, so you can use free Wi-Fi with peace of mind. It's convenient because it saves on data charges when downloading large-volume apps on the go.
Apps that can use public wireless LAN (Wi-Fi)
"Giga elephant Wi-Fi"
Tethering
You can use it for free! *1
Even if you don't have a mobile Wi-Fi router, you can use your PC or game console to connect to the Internet regardless of whether you're indoors or outdoors.
Information on payment methods
In principle, J:COM MOBILE charges can only be paid by credit card. Acceptable credit cards are those with the following marks.
- Debit cards are not accepted.
It can be used to pay for products (terminals, etc.) and monthly usage charges. Matters related to the date of withdrawal from the credit card settlement account and payment are based on the membership agreement stipulated by the designated credit card company and the terms and conditions and special agreements stipulated by our company. In principle, please specify a credit card in the name of the contractor.
- If User J:COM and would like to use bank account transfer, you can also use bank transfer directly.
Here is what you need when signing a contract
J:COM MOBILE
Notes regarding contracts
- To sign a contract, a document confirming the identity of the contracting party is required.
- Contract changes, option additions, etc. are limited to applications from the contract holder. In addition, a separate fee is required for each change.
- Service suspension is possible only if you wish to suspend service usage to prevent unauthorized use such as theft or loss. However, basic charges and optional service usage charges will be incurred even during the service suspension period.
- The usage start month is billed on a daily basis.
J:COM MOBILE
About A Plan ST
(SIM Card /device set)
- You can subscribe up to 5 lines per household.
- If the total amount of data used in a month exceeds the monthly data allowance (including additional and carried over data), the maximum sending and receiving speed until the end of that month will be [1GB/5GB] 200kbps / [10GB/20GB/50GB] 1Mbps.
- SIM unlock may be required.
- If you do not receive the product (device, etc.) within 7 days after the estimated arrival date due to your absence, etc., usage charges may be incurred from the 8th day including the estimated arrival date.
- Terminals designated by our company can be purchased for each line from the 13th month after the first billing start month of the previously purchased J:COM MOBILE terminal.
J:COM MOBILE
About A Plan SU
(eSIM)
- A maximum of 5 lines can be subscribed under the name of one subscriber.
- If the total amount of data used in a month exceeds the monthly data allowance (including additional and carried over data), the maximum sending and receiving speed until the end of that month will be [1GB/5GB] 200kbps / [10GB/20GB/50GB] 1Mbps.
- SIM unlock may be required.
Contract terms, etc.
[Notes]
- Data communication amount during tethering connection is counted as J:COM MOBILE communication amount.
[About J:COM MOBILE A Plan]
- Both voice calls and data communications are available in au's 4G LTE areas (5G is supported in some areas). 3G communications are not available.
- Even within the service area, you may not be able to communicate or your communication speed may be slow. You may also not be able to use the service even if you are on a high floor of a high-rise building or apartment building with a good view. For the latest area information, please visit the au website.
- The communication speed is a best effort service, and we do not guarantee a certain speed. It varies depending on the usage environment.
[About monthly data capacity]
- If the total amount of data used in a month exceeds the monthly data allowance (including additional data and carryover data), the maximum data speed for sending and receiving until the end of that month will be 200kbps for [1GB/5GB] / 1Mbps for [10GB/20GB/50GB]. To return to the normal speed, you will need to purchase additional data (200 yen (220 yen including tax) for every 500MB).
[Regarding the procedure for switching between monthly data volume increase/speed increase after exceeding]
- Customers who subscribed before Wednesday, September 16, 2020 and are currently using monthly data capacity [0.5GB/3GB] will be automatically switched to [1GB/5GB] (no voice contract). (not applicable).
In addition, for customers currently using [10GB/20GB], the maximum speed of 200kbps will be automatically switched to 1Mbps after exceeding the contract plan capacity.
Please check J:COM homepage (https://r.jcom.jp/wfevc5K) for details such as the transition period.
[Notes on changing J:COM MOBILE A Plan ST/SU]
- If you subscribed to the "J:COM MOBILE A Plan" before Wednesday, February 17, 2021, and change your current plan to the "J:COM MOBILE A Plan ST," any currently applied discounts will end.
[About Gigazo]
- Available by contract with Wire & Wireless Co., Ltd.
- Some services may not be available depending on the device.
- There are limited spaces available within the facility. Also, it may not be available depending on the store or vehicle.
- Separate usage registration required.
Recommended as a set/
Popular services
If you are considering signing up or adding services
Sign Up information
FAQ
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.
Can you issue a receipt?
Please refer to the link below for details on the initial costs incurred at the time of contract.
I want to know about support after joining
We offer a wide range of contact methods, from inquiries by phone or chat to guidance on our homepage with support information. In addition, by subscribing to Enkaku Support (550 yen per month (tax included)), you can receive remotely operated support from an operator.
Where can I check what plan I have?
You can check the plan you are subscribed to with J:COM MOBILE on My Page.
Where can I see my call details?
You can check your J:COM MOBILE call details on My Page.
I want to transfer data such as my phone book to a new smartphone, what should I do?
Solve difficult settings at home. Leave the initial settings of your smartphone to Enkaku Support!
J:COM MOBILE provides free support that provides detailed instructions on initial settings, migration of phonebook data, instructions on how to use the service, etc. for those who wish to do so.
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)
[About the amount including tax]
- Consumption tax differences may occur due to changes in the consumption tax rounding method under the invoice system.
