Japan eSIM checklist: Everything you need to know before you fly to Japan

What happened

Landing in Japan without mobile data can make a long travel day much harder than it needs to be. The minute you arrive you’ll likely rely on your phone for train routes, maps, translation, reservations, and messages, so it’s best to sort out getting connected before your flight.

Where the sources line up

I’ve lived in Japan for nearly a decade, both in cities and the countryside, and I’ve used several different ways to stay connected. These days, I’ve found an eSIM to be the easiest option. But there are a few things worth checking before you buy one. Your phone needs to support eSIMs, your plan needs enough data for your trip, and activation rules can vary between providers. This checklist covers what to look for, how to set up everything, and what to do once you land in Japan.

Practical impact for readers

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Who should pay attention now

Before you buy a Japan eSIM, it’s necessary to check two things: whether your phone supports eSIMs and whether it’s carrier-unlocked. Most newer phones support eSIMs, but there are exceptions based on the model and where it was purchased.

What is still unclear

You’ll also need an unlocked phone. If you bought your phone through a carrier, it may be locked to that carrier’s network, which can prevent you from adding a travel eSIM from another provider. It’s a good idea to check your phone’s lock status before trying to use a second carrier.

Source notes

PCWorld