Japan eSIM guide: data, networks and tips for your trip

eSIM vs pocket Wi-Fi vs SIM card

• eSIM: delivered by email, no pickup or return, keeps your own number active for SMS codes.
• Pocket Wi-Fi: handy for groups, but it's an extra device to charge, carry and return before your flight.
• Physical SIM: available at airports, but you need to swap cards and keep your own SIM safe.

How much data do you need in Japan?

Japan runs on Google Maps: train routes, platforms and transfers are accurate to the minute. Add camera translation, restaurant reviews and social media, and you'll use 0.7 to 1.5 GB a day. Many travellers choose an unlimited plan so they never have to think about it.

Practical tips

• Travel eSIMs for Japan are data-only: you won't get a Japanese phone number. Use WhatsApp, LINE or FaceTime for calls.
• On iPhone you can add a Suica or PASMO card to Apple Wallet and pay for trains, buses and convenience stores.
• Free Wi-Fi exists in stations and convenience stores, but it often needs registration and drops out.
• Cherry blossom season (late March to early April) and autumn colours (November) are busy: book hotels and trains early.

Installing your Japan eSIM

1. Check that your phone supports eSIM: dial *#06# and look for an EID.
2. Install the eSIM at home over Wi-Fi.
3. On landing, turn on the eSIM and data roaming for that line.
4. Set it as your mobile data line; keep your own SIM for SMS.