Buy a Japan eSIM, check that your iPhone or Android is eSIM-compatible and unlocked, then install it with the provider’s QR code and select it for mobile data in Japan.
Buy a Japan eSIM, check that your iPhone or Android is eSIM-compatible and unlocked, then install it with the provider’s QR code and select it for mobile data in Japan.
Before you buy
Confirm that your phone supports eSIM and is not locked to a carrier. Because the installation profile is delivered digitally, keep access to your email and a reliable Wi-Fi connection during setup.
Choose a plan that matches your stay and expected data use. 日本eSIM専門店 offers Japan plans from ¥130〜（税込）（2026-10-10 時点）. Check the plan details for data sharing, tethering, voice, SMS, and activation conditions before purchase.
Travel use |
Suggested plan |
Price |
|---|---|---|
Very light data use |
5日・0.5GB |
¥550（税込）（2026-10-10 時点） |
Maps and messaging |
7日・5GB |
¥1,280（税込）（2026-10-10 時点） |
Regular sightseeing use |
15日・10GB |
¥1,860（税込）（2026-10-10 時点） |
Longer stay with moderate use |
30日・10GB |
¥1,980（税込）（2026-10-10 時点） |
Heavy data use |
7日・無制限 |
¥2,780（税込）（2026-10-10 時点） |
Set up on iPhone
Purchase the Japan plan from https://esim.ne.jp and open the installation details sent to your email.
Connect your iPhone to Wi-Fi.
Open Settings, choose Cellular or Mobile Service, and select Add eSIM.
Choose the QR-code option and scan the code shown on another screen or printed document.
Follow the prompts to label the line as Japan.
Select the Japan eSIM for mobile data when you are ready to use it.
Keep your home line available for calls only if needed, and review data-roaming settings to avoid unexpected charges.
Menu names can vary by iOS version and region. If the QR code is displayed on the same iPhone, use the provider’s manual installation details or display the code on another device.
Set up on Android
Purchase the Japan plan from https://esim.ne.jp and open the email containing the installation details.
Connect your Android phone to Wi-Fi.
Open Settings and find the SIM, Mobile Network, or Network and Internet section.
Choose the option to add or download an eSIM, then scan the provider’s QR code.
Follow the on-screen instructions and name the new line Japan.
Select the Japan eSIM as the mobile-data line when you arrive.
Review roaming and automatic data-switching settings for your home SIM.
Android menu names differ by manufacturer and software version. Therefore, use the phone maker’s current instructions if the eSIM menu is not easy to find.
When you arrive in Japan
Turn on the Japan eSIM and select it for mobile data. Because the phone may otherwise continue using your home line, check the data line and roaming settings before browsing.
Open a map or webpage to test the connection. If it does not work, restart the phone, confirm that the Japan line is enabled, and check the provider’s APN instructions. Therefore, keeping the purchase email accessible is useful during arrival and transit.
Who this is for (こんな人向け)
This guide is for travelers who:
Want mobile data in Japan without replacing a physical SIM.
Use an eSIM-compatible, carrier-unlocked iPhone or Android phone.
Prefer to install the service before departure.
Need maps, translation, messaging, or transit information while traveling.
Want to keep their home SIM available while using a Japan data plan.
It may not suit a phone that is carrier-locked, lacks eSIM support, or requires a physical SIM for the traveler’s preferred service.
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
Can I install a Japan eSIM before leaving home?
Yes. Install it while connected to reliable Wi-Fi, then follow the provider’s instructions for when to enable the line and begin using mobile data in Japan.
How do I know whether my phone supports eSIM?
Check the phone settings for an option to add or download an eSIM, then confirm the model details with the phone maker. The phone must also be carrier-unlocked.
Do I need Wi-Fi to install an eSIM?
Wi-Fi is strongly recommended because the phone needs an internet connection to download the eSIM profile. Install it before departure or use trusted Wi-Fi after arrival.
Should I remove my home SIM?
Usually, you can leave it installed. Select the Japan eSIM for mobile data and review roaming settings on your home line to help avoid unexpected charges.
Can I use the eSIM for calls and SMS?
This depends on the plan. Check the product details before purchase because some travel eSIMs are intended for data only.
What should I do if the QR code does not scan?
Increase the brightness of the screen showing the code, keep the camera steady, and try again. If scanning still fails, use the manual installation details supplied by the provider.
Why is my Japan eSIM installed but not connecting?
Confirm that the eSIM is enabled, selected for mobile data, and covered by the plan. Restart the phone and review any APN or roaming instructions from the provider.
Can I use tethering with a Japan eSIM?
Tethering availability depends on the plan and network conditions. Check the product details before relying on it for another device.
Where can I buy a Japan eSIM?
You can review Japan plans from 日本eSIM専門店 at https://esim.ne.jp. Check the plan conditions and price information before purchase.