Set up your eSIM with stable WiFi.
How to Use an eSIM
in Japan on
iPhone and AndroidHow to Use an
eSIM in Japan on
iPhone and
Android
Set up your eSIM before your trip and get connected when you arrive in Japan.
Select your eSIM and start using data.
No SIM card or WiFi device to collect.
BEFORE YOU START
Check If Your Phone Supports eSIM
eSIM support varies by device model, region, and carrier. Apple states that iPhone XS, iPhone XS Max, iPhone XR, and later models support eSIM, provided that the carrier or service provider also supports eSIM. Android compatibility varies by manufacturer and model, so check your device settings or the manufacturer's website before purchasing.
CHECK 01
Make Sure Your Phone Is Unlocked
Your phone must be unlocked to use another provider's eSIM. If your phone is still locked to your home carrier, contact your carrier before purchasing a travel eSIM.
CHECK 02
Prepare Your QR Code or Activation Details
Keep the setup email, QR code, and activation details accessible during setup. If your phone needs to scan a QR code, open the code on another device or print it before setup.
STEP-BY-STEP
How to Set Up Your eSIM
Choose your device to see the setup instructions.
Connect to Wi-Fi before you start
How to Set Up an eSIM on iPhone
Follow the steps below to install your eSIM and connect in Japan.
Menu names and screen layouts may vary by device, OS version, and language. Follow the activation instructions provided with your purchase.
- OpenSettings
CellularAdd eSIM - Use the QR code or enter the activation information provided after purchase.
- Enter the issued activation information when requested.
- Follow the on-screen instructions until setup is complete.
- Select the new eSIM for mobile data and turn on the connection.
- Enable data roaming for the NINJA WiFi eSIM when instructed.
Do not change APN settings unless the activation instructions provided after purchase specifically instruct you to do so.
Connect to Wi-Fi before you start
How to Set Up an eSIM on an Android
Android navigation menus vary by manufacturer, model, operating-system version, and device language.
Open the SIM or mobile-network settings and follow the instructions provided with your NINJA WiFi order.
Navigation menus may vary depending on the manufacturer, model, Android version, and device language. Follow the instructions provided with your order.
Open the SIM or mobile-network settings and follow the instructions provided with your NINJA WiFi order.
- Open the SIM or mobile-network settings on your device.
- Add the eSIM using the issued activation information.
- Follow the on-screen instructions to complete the installation.
- Turn on the newly added eSIM connection.
- Open the APN settings and enter the NINJA WiFi APN values provided with your activation instructions.
- Save the APN, select it if required, and confirm that mobile data is working.
Please note that Android devices require APN configuration after the eSIM is installed. Completing the eSIM installation alone may not enable mobile data until the APN settings are configured.
WHEN TO SET UP
When Should You Set Up Your eSIM?
Complete the setup while you have a stable internet connection. Installing your eSIM in advance can make it easier to connect after you arrive in Japan.
Avoid waiting until you leave the airport and no longer have reliable internet access. Keep the instructions in your email and save the basic steps offline if possible.
TROUBLESHOOTING
What to Do If Your eSIM Does Not Work
Start with your trip style, then choose the closest data range.
No Signal
Wait a few minutes after setup. If no signal appears, confirm the eSIM connection is turned on, data roaming is enabled, and the correct connection is selected for mobile data. Restarting the phone can also help after settings are changed.
QR Code Error
If the QR code or activation details produces an error, do not delete an installed eSIM profile. Check the instructions sent with your order. If the issue continues, contact NINJA WiFi support before removing or reinstalling the eSIM.
Mobile Data Not Working
Confirm that the NINJA WiFi eSIM is selected for mobile data and that data roaming is enabled when instructed. On Android, also confirm that the saved APN matches the information provided with your order.
Hotspot or Tethering Not Working
For iPhone Personal Hotspot, enter the APN information shown in the NINJA WiFi setup guide. On Android, confirm both the mobile-data APN and the device's hotspot settings.
FAQ
FAQ About Buying an eSIM for Japan
QCan I use a Japan eSIM on my iPhone?
AYes, if your iPhone supports eSIM, is unlocked, and works with the provider. Apple lists iPhone XS, iPhone XS Max, iPhone XR, and later models as supporting eSIM, depending on the region, model, and service provider.
QCan I use a Japan eSIM on my Android phone?
AYes, if your Android device supports eSIM and is unlocked. Android setup steps vary by manufacturer, so reference the Android APN setting instructions on the NINJA WiFi setup page.
QDo I need WiFi to install an eSIM?
AYou need internet access to complete setup. Use stable WiFi when installing your eSIM so you can access the setup instructions and activation information.
QShould I remove my home SIM?
ANot always. Some compatible dual-SIM phones can keep a home connection and a travel eSIM active at the same time. Available settings depend on the device and carrier. Set the Japan eSIM as the mobile data connection when you want to use it for data in Japan.
QWhat if I accidentally delete the eSIM?
AIf you delete the eSIM or cannot reinstall it, stop the setup process and contact NINJA WiFi support. Do not repeatedly remove or add the profile without support instructions.
User Guides
Explore NINJA Travel eSIM Guides
Compare available plans, learn how to
purchase and use an eSIM,
or compare eSIM with Pocket WiFi before your
trip to Japan.
purchase and use an eSIM,
or compare eSIM with Pocket WiFi before your
trip to Japan.
NINJA Travel eSIM Overview
Learn how NINJA WiFi eSIM works, review the available options, and find information you need for your trip to Japan.
View eSIM Overview
Japan eSIM
Plans
Compare data amounts and unlimited options based on your expected usage and trip length.
View eSIM Plans
How to Buy an eSIM for Japan
Check device requirements, order online, and prepare activation before your trip.
View Buying Guide
eSIM vs Pocket WiFi in Japan
Compare device requirements, sharing, charging, pickup, return, and backup needs.
Compare Options
Get Your eSIM Ready for Japan
Check that your phone supports eSIM, choose a plan, and keep the activation details sent after purchase accessible during setup.
View the eSIM Setup Guide