Moving Your Data to a New Phone in Japan: Contacts, Photos, Apps and 2FA

Quick answer

Hi, I'm Miya — I help newcomers settle into life in Japan, and changing phones is one of those moments that makes everyone a little nervous. The good news: if you go in order — back up first, then move contacts and photos, then your chat history and apps, and finally re-register your two-factor and banking apps — nothing gets lost. The quiet anchor through all of it is your Japanese phone number, which most apps re-verify against when you switch devices, so keep that line active and reachable while you move.

Back up before you touch anything

Before I move a single thing, I make a full backup of the old phone. Most phones can back up to their built-in cloud or to a computer over a cable, and doing this first means you always have a safety net if a step goes sideways. Charge both phones, connect to stable Wi-Fi, and don't rush the backup — let it finish completely.

While that runs, make a short list of what actually matters to you: contacts, photos and videos, chat history, and the apps you sign in to for money, points, and identity. That last group is the one that needs real attention, so I like to see it written down before I start.

Contacts and photos

Contacts are usually the easiest win. If you've been saving them to an account rather than only to the phone itself, they'll reappear the moment you sign in on the new device. If some live only on the phone or on your SIM, export them first so none slip through.

Photos and videos are just about space and patience. Sync them to a cloud library or copy them to a computer, confirm the new phone can actually see them, and only then consider clearing the old device. I never delete anything off the old phone until I've seen it safely on the new one.

Chat history and apps

Chat apps keep your conversations, but the history often needs its own backup step inside the app before you switch — and then a restore step on the new phone. Do that export while the old phone is still working, because some chat history simply can't be recovered after the fact.

For the rest of your apps, reinstalling is simple; signing back in is the real work. Gather your passwords in one place first. A password manager makes this painless, but even a careful written list will save you a lot of stop-and-start on moving day.

The one people forget: 2FA and banking apps

Here's the step that trips people up. Two-factor authentication and banking, payment, and point apps are often tied to your specific device, so they don't just carry over — you re-register them on the new phone. If you use an authenticator app for security codes, move or re-add those accounts deliberately, ideally before you wipe the old phone.

Most of these apps re-verify you by sending a code to your phone number or by confirming your identity, so having your Japanese number live and in hand makes each one a quick tap rather than a locked-out headache. Work through them one at a time and sign in to each before you consider the move finished.

Keep your number active through the move

You can see the pattern by now: your Japanese phone number is the thread every re-verification pulls on. That's why I tell people to keep the line active and reachable throughout the switch, and to only fully retire the old phone once every important app is signed in on the new one.

If you're still setting up that number — or want a plan that makes device changes this smooth — getting a Japanese line is easier than most people expect: you apply online with just your residence card, and an eSIM-capable phone can be ready in around fifteen minutes and activate the same day. Have a look at our setup guide, and I'll be right here for the mobile part.