Japan SIM card or eSIM: where to buy and what it costs
Where to buy a Japan SIM card at Narita, Haneda, Kansai or in town, prices checked on 3 Nov 2026, unlimited data options, and when an eSIM is simpler.
Author
Thomas Grippaudo
Author of the Mobile Companion guides
Thomas Grippaudo writes Mobile Companion’s guides and articles: installing your eSIM, staying reachable and getting your connection ready before you fly to Japan.
Articles
eSIM vs pocket WiFi in Japan: which one for your trip?
Pocket WiFi in Japan: rental prices from 4 companies checked on 3 Nov 2026, battery, pick-up and return, compared with an eSIM. See which fits your trip.
What is an eSIM? A simple explanation
An eSIM is a SIM built into your phone: no plastic card, just a plan you download. What it is, how it works, its pros and cons, and why travellers use one.
How to activate an eSIM on iPhone
Activate your eSIM on iPhone: tap the install link or scan the QR code, label your lines and choose which one uses mobile data before you fly.
How to activate an eSIM on Android (Samsung, Pixel)
Activate your eSIM on a Samsung Galaxy or Google Pixel: add it with the QR code, set mobile data to the eSIM and check roaming before you fly.
When to activate your eSIM: before or after you fly?
Install your eSIM at home on Wi-Fi, then switch it on when you land in Japan. When your plan starts, and the settings to change before take-off.
eSIM vs physical SIM: what’s the difference?
eSIM or physical SIM? Compare how each installs, switches plans, travels and copes with a lost phone, in one clear table, then see which suits your trip.
How much eSIM data do you need in Japan?
How much data for 7, 10 or 14 days in Japan? Estimate your use for maps, social media, video and hotspot, then pick the right plan.
Unable to activate your eSIM? What to check
eSIM won’t activate or no data in Japan? Check these settings in order: connection, unlocked phone, data line, aeroplane mode, then contact support.
How to remove an eSIM from your iPhone after your trip
Back from your trip? How to turn off or delete your travel eSIM on iPhone and Android, and why turning it off is often the safer choice.
