How to Use eSIM in Japan

Learn how eSIM works, how to set it up before arrival, and what to check before using it in Japan.

eSIM lets you add mobile service to your phone without inserting a physical SIM card. Because you can often buy and set it up before you travel, it is one of the easiest ways to get online as soon as you land.

Advantages of eSIM

• No physical SIM swap is needed
• You can often buy and set it up before arriving in Japan
• Some phones let you keep multiple SIM profiles and switch between them

How to check whether your phone supports it

Many recent iPhones and some Android models support eSIM. If your settings menu shows an option to add a SIM or mobile plan, the device may support it.

Typical setup flow

1. Buy a plan from an app or website

2. Receive a QR code or activation code

3. Scan the QR code in your phone settings

4. Activate the plan

Important cautions

• On some devices, removing and re-adding an eSIM can be inconvenient
• Some long-term Japanese plans also support eSIM, not just travel plans
• If your device supports both physical SIM and eSIM, you may be able to keep your home-country number while adding a Japan plan