The iPhone 16 series supports eSIM, allowing you to use mobile data in Japan without swapping SIM cards during your trip. Therefore, many people may wonder, "Can I use eSIM in Japan with the iPhone 16?" and "Is the setup process difficult?"
If you set up the eSIM for Japan before your trip, you can start using mobile data immediately upon arrival. This is convenient for first-time visitors to Japan, as there is no need to purchase or exchange a SIM card at the airport.
In this article, we will explain in detail how to use the Japanese eSIM with the iPhone 16, the setup process, compatible models, and important points to check before use.

Does the iPhone 16 support eSIM?
Yes. The iPhone 16 series supports eSIM.
If you have a compatible model, you can add a Japanese eSIM without removing your physical SIM. For models that support dual SIM, it is also possible to use both your regular SIM and the Japanese eSIM simultaneously.
| Model | eSIM Support |
|---|---|
| iPhone 16 | Yes |
| iPhone 16 Plus | Yes |
| iPhone 16 Pro | Yes |
| iPhone 16 Pro Max | Yes |
Since the usage conditions may vary depending on the country or model you purchased, be sure to check for SIM lock status and eSIM compatibility before your trip.

Steps to set up Japanese eSIM on iPhone 16
- Purchase a Japanese eSIM
- Receive a QR code or setup information
- Open "Settings" on your iPhone
- Select "Cellular" → "Add eSIM"
- Scan the QR code or enter the setup information
- Add the eSIM and complete the setup
- Switch to the eSIM for mobile data after arriving in Japan
If you complete the setup before your trip, you can start using mobile data as soon as you arrive in Japan.
Points to check before setup
- Update your iPhone to the latest version
- Confirm that the SIM lock is removed
- Set up in a stable Wi-Fi environment
- Save the QR code without deleting it
- Complete the addition of the eSIM before your trip
An internet connection is required for eSIM setup. It is recommended to set it up in a stable Wi-Fi environment, such as at home or in a hotel.

Benefits of using eSIM during your trip to Japan
- No need to purchase a SIM card at the airport
- No hassle of swapping SIM cards
- Start using mobile data immediately upon arrival
- Access Google Maps and transit apps right away
- Easy to use alongside your regular SIM during your trip
By setting up the eSIM in advance for your trip to Japan, you can start moving and sightseeing more smoothly.
Points to consider when using eSIM on iPhone 16
If you plan to use the Japanese eSIM on your iPhone 16, it is reassuring to complete the setup before your trip. After arriving in Japan, you can start using it simply by switching to mobile data, saving you the hassle of purchasing a SIM card at the airport.
- Add the eSIM before your trip
- Use a stable Wi-Fi connection during setup
- Save the QR code without deleting it
- Check how to switch mobile data
- Confirm that the SIM lock is removed
Additionally, you can use the Japanese eSIM while keeping your regular SIM, making it convenient for those who want to separate work and personal numbers.

Frequently Asked Questions
Does every iPhone 16 support eSIM?
The iPhone 16 series supports eSIM. However, specifications may vary depending on the country or region of purchase, so it is advisable to check compatibility before use.
Do I need to remove the SIM card?
No. Since eSIM is added digitally to the device, you can use it without removing the physical SIM card if you have a compatible model.
Is an internet connection required for eSIM setup?
Yes. An internet connection, such as Wi-Fi, is required when adding the eSIM. It is recommended to complete the setup before your trip.
What should I do upon arriving in Japan?
After arriving in Japan, you can start using the eSIM by simply switching mobile data to the Japanese eSIM from "Settings." Depending on the product, you may need to enable data roaming, so please check the instructions for the eSIM you purchased.
Can I use dual SIM on the iPhone 16?
On compatible models, you can use both your regular SIM and the Japanese eSIM. This allows you to switch lines as needed, making it easier to maintain your regular phone number during your trip.
Can I reuse an eSIM after deleting it?
It varies by product. Some eSIMs cannot be reinstalled once deleted, so it is recommended not to delete it until you no longer need it. Please check the instructions for the eSIM service you purchased for more details.
Is there anything I should prepare before my trip?
Make sure to update your iPhone to the latest version, check the SIM lock status, and add the eSIM. It is also reassuring to save the QR code and setup information.
Conclusion
The iPhone 16 series supports eSIM, making it easy to use mobile data during your trip to Japan. If you complete the setup before your trip, you can immediately access Google Maps, transit apps, and social media upon arrival, allowing you to start your journey more comfortably.
- The iPhone 16 series supports eSIM
- Setting it up before your trip allows for immediate use upon arrival
- No need to swap SIM cards
- Compatible models support using both your regular SIM and eSIM
- Checking SIM lock and compatibility before setup is reassuring
To enjoy your trip to Japan more comfortably, it is recommended to prepare a Japanese eSIM before your trip and set it up on your iPhone 16.