eSIM FAQ
Everything you need to know about esim for Japan.
Frequently asked questions
What is an eSIM and how does it work in Japan?
An eSIM (embedded SIM) is a digital SIM that allows you to activate a cellular plan without a physical SIM card. For Japan travel, you purchase a plan online, scan a QR code, and your phone connects to Japanese networks. Most modern smartphones (iPhone XS and later, recent Samsung Galaxy, Google Pixel) support eSIM.
Do I need to unlock my phone to use an eSIM in Japan?
No, eSIMs work independently from your physical SIM slot, so your phone does not need to be carrier-unlocked. However, your device must support eSIM technology. Check your phone settings for the option to add a cellular plan.
Can I use my eSIM for calls and texts in Japan?
Most Japan eSIM plans are data-only, meaning they provide internet access but not a local phone number for calls/texts. You can use VoIP apps like WhatsApp, LINE, or Skype for calls over data. Some providers offer voice plans at a higher price.
When should I activate my Japan eSIM?
You can install the eSIM before your trip, but most plans activate when you first connect to a Japanese network. We recommend installing it before departure and activating it upon landing in Japan.
Which eSIM provider has the best coverage in rural Japan?
Providers using the Docomo network generally have the best coverage in rural areas. Airalo and Ubigi offer Docomo-based plans. SoftBank also has excellent coverage in most areas but may be weaker in very remote regions.