eSIM for Japan: fast internet from the moment you land

June 23, 2026

Heading to Japan β€” Tokyo, Osaka, Kyoto or further? With an eSIM for Japan you have blazing-fast internet the moment you land, perfect for navigation, train routes and translation. Here's how it works.

Why an eSIM for Japan?

Roaming in Japan is expensive, and buying a local SIM card isn't always easy for tourists. An eSIM is bought in advance online and activated with a QR code β€” instantly connected on arrival at Narita or Haneda.

Sorted in 3 steps

  • Choose your plan on the Japan page of Ariya Mobile.
  • Receive your QR code instantly by email.
  • Scan, activate and turn on data roaming on arrival.
Tip: install the eSIM before departure over wifi and only activate the data once you're in Japan.

Coverage and networks in Japan

The eSIM for Japan connects to the major networks (NTT Docomo, SoftBank and au (KDDI)) for fast 4G/5G internet in cities and along the shinkansen routes, from Tokyo and Osaka to Kyoto and Hokkaido.

Ready for your trip?

Buy your eSIM for Japan in a few minutes. Heading to Switzerland afterwards? Read our eSIM for Switzerland guide, or check out all destinations.

Ready to stay connected?

View the eSIM plans