Staying Connected in Japan: eSIM, SIM Cards & Pocket Wifi

Last reviewed: October 27, 2026 · Prices are approximate and for orientation only.

Mobile data makes Japan dramatically easier: live train routing, translation and maps. Coverage is excellent in cities and along rail lines.

Option 1: eSIM (easiest for most)

If your phone is unlocked and supports eSIM, you can buy a data-only travel eSIM online before you leave and activate it when you land. Plans are sold by many international eSIM providers and by Japanese carriers' travel brands. Data-only eSIMs usually don't include a Japanese phone number — fine for most travellers, since apps handle calls.

Option 2: Prepaid physical SIM

Data-only tourist SIMs are sold at airports, electronics stores (e.g. Bic Camera, Yodobashi) and online. Some offer voice numbers but these require more paperwork.

Option 3: Pocket wifi rental

A portable router shared by a group, rented online and collected at the airport or delivered to your hotel. Good for families or groups with several devices, or phones without eSIM. Downsides: another device to charge and carry, and everyone must stay together.

Option 4: Home carrier roaming

Some carriers include Japan in roaming packages. Convenient but check daily costs carefully.

Free wifi

Free wifi is available at many stations, airports, convenience stores, cafés and attractions, often requiring a quick registration. Hotels almost always provide it. It's useful backup, but not a substitute for mobile data.

Which should you choose?

• Solo or couple with modern phones: eSIM.
• Group or family: pocket wifi, or one eSIM per adult.
• Locked phone: pocket wifi or roaming.

Useful apps

• A maps app with transit directions (Google Maps works well).
• A translation app with camera translation for menus.
• JR and airline apps for bookings; the Japan Official Travel App from JNTO.
• Safety Tips — the Japan Tourism Agency's app for earthquake and weather alerts in English.