Yes, usually. Keep your home SIM active for SMS and use the Japan eSIM for data. Your carrier must allow the home line to stay connected, and roaming charges may apply.
Yes, usually. Keep your home SIM active for SMS and use the Japan eSIM for data. Your carrier must allow the home line to stay connected, and roaming charges may apply.
How it works
A Japan eSIM and your home SIM can serve different purposes. Set the Japan eSIM as your mobile data line, while your home SIM stays enabled for SMS. Your home number can receive verification messages because those messages are delivered through the home carrier rather than the Japan eSIM.
This setup is useful when an account sends a code to your existing number. Keep the home line connected, so the carrier can register it on a Japanese partner network. Because carrier policies differ, check whether receiving SMS abroad is supported before departure.
The Japan eSIM from 日本eSIM専門店 is intended for connectivity in Japan. Visit [redacted] to review available plans.
Recommended settings
Install the Japan eSIM before or after arrival while you have a stable internet connection.
Select the Japan eSIM for mobile data.
Keep your home SIM enabled for calls and SMS.
Turn off data roaming on the home SIM unless you specifically need it.
Check that your phone can use dual SIM or multiple eSIM profiles.
Confirm that the home line still shows a network connection after landing.
Your phone may ask which line to use for calls, messages, or data. Choose the Japan eSIM for data and the home line for messages sent from your home number. Therefore, review these choices before requesting an important verification code.
Options compared
Setup |
Mobile data in Japan |
SMS codes to your home number |
Main point |
|---|---|---|---|
Home SIM and Japan eSIM |
Japan eSIM |
Usually available |
Convenient for data and account verification |
Japan eSIM only |
Japan eSIM |
Usually unavailable on the home number |
Best when SMS access is not needed |
Home SIM only |
Home carrier |
Usually available |
May involve roaming data charges |
Wi-Fi and home SIM |
Wi-Fi |
Usually available |
Dependent on Wi-Fi access |
Who this is for
This setup suits travelers who:
Need login or payment verification sent to their home number.
Want Japan data without making the home SIM their data line.
Need to keep an existing number available during a trip.
Have a phone that supports dual SIM or multiple eSIM profiles.
It may not suit you if your home carrier suspends service abroad, blocks international network access, or requires a special roaming option for SMS. In that case, contact the carrier before traveling because the Japan eSIM cannot receive messages sent to your home number.
If SMS codes do not arrive
Confirm that the home SIM is enabled.
Check that the home line has network service.
Verify that the verification message is being sent to the correct number.
Try moving to an area with better network coverage.
Ask your home carrier whether international SMS reception is supported.
Use an alternative verification method if the service provides one.
Do not delete the home SIM or replace it with the Japan eSIM if you still need messages sent to the home number. The Japan eSIM provides Japan connectivity, but it does not automatically take over the identity of your home line.
Recommended eSIM for this trip
- Japan eSIM unlimited plan（from ¥760）
- Japan eSIM 7-day plan（from ¥980）
- Japan eSIM 1-day plan（from ¥1,260）
FAQ
Will my home number still receive SMS codes with a Japan eSIM?
Usually, yes. Keep the home SIM active and connected to a partner network while selecting the Japan eSIM for mobile data. Your home carrier must support SMS reception abroad.
Does a Japan eSIM replace my home number?
No. A Japan eSIM normally provides a separate data connection in Japan. Messages sent to your home number continue to depend on the home SIM and its carrier service.
Can I use the Japan eSIM for data and my home SIM for SMS?
Yes, if your phone supports dual SIM or multiple eSIM profiles. Set the Japan eSIM as the data line and leave the home SIM enabled for SMS.
Will receiving verification SMS cause roaming charges?
It depends on your home carrier. Some carriers allow incoming SMS abroad without a fee, while others may apply roaming terms. Check the carrier conditions before travel.
Do I need to turn on data roaming for my home SIM?
Usually, no. You can keep data roaming off on the home SIM and use the Japan eSIM for mobile data. The home line may still need network access for SMS reception.
What should I do if a code does not arrive?
Check that the home SIM is enabled, has network service, and is linked to the correct number. Then confirm with your home carrier that international SMS reception is supported.
Can I receive calls on my home number as well?
Possibly, depending on your carrier and roaming settings. Incoming calls may have different charges and conditions from incoming SMS, so confirm the details before travel.
Is a Japan eSIM suitable if I only need SMS codes?
It can be useful when you also need mobile data in Japan. If you only need SMS, the key requirement is keeping your home line active and supported abroad.