Registering at the Ward Office: A Newcomer's Walkthrough

Quick answer

Hi, I'm Miya, and I help newcomers settle into Japan. When you move into a new address, you register it at your local ward office (区役所) or city/town hall (市役所・役場) — the office for the area you actually live in. You have 14 days from your move-in date to do it, and once it's done your address is officially on record, which is what unlocks health insurance, a bank account, and more. It's mostly paperwork and a short wait, so don't let it intimidate you.

What the ward office actually does for you

Think of the ward office as the front desk for your life admin in Japan. It keeps your resident record (住民票), which lists your registered address and household — you'll be asked for a copy of it when you rent, open accounts, or sign contracts.

The same office handles National Health Insurance, the National Pension, the My Number system, child and childcare support, and garbage and local-service information for your neighborhood. Getting registered here is the step that connects you to all of it.

The 14-day rule

The deadline that matters: you must report your move-in within 14 days of the day you started living at the new address. If you're arriving from overseas, you file a 'moving-in notification' (転入届) once you have your residence card and a place to live.

If you're moving within Japan from another city, get a 'moving-out certificate' (転出証明書) from your old ward office first, then bring it to the new one. Moving within the same ward is simpler — you just file a change-of-address notification (転居届). Missing the 14 days isn't a disaster, but do it promptly; a lot of other setup waits on it.

What to bring

Pack these before you go so you only make one trip: your residence card (在留カード) for everyone registering, your passport, and — if you moved from another Japanese city — the moving-out certificate (転出証明書) from your previous office.

If you have a My Number card or notification already, bring it. Registering a whole household? Bring everyone's residence cards, and documents proving your relationship if the office asks. A pen and your new address written down exactly (in Japanese if you can) makes the forms faster.

What happens at the counter

You take a number, fill in a move-in form with your name, new address, and date of move-in, and hand it in with your documents. Staff update your resident record and write your new address on the back of your residence card — so you'll get the card back with the address filled in.

Many offices have multilingual support or a translation tablet, and signs are often in English too. If you're unsure which counter to go to, show the information desk your residence card and say you've just moved in — they'll point you the right way.

Health insurance, pension, and My Number

While you're there, ask about enrolling in National Health Insurance (国民健康保険) if you're not already covered through an employer — it's usually handled at the same visit, and it's what gets you the ~30% patient rate at clinics. If you're employed, your company often manages insurance and pension instead, so check first.

You'll also be brought into the My Number (マイナンバー) system — a 12-digit ID used for tax and social insurance. You can apply for the physical My Number card here or later; it doubles as a photo ID and speeds up a lot of paperwork down the line.

Set up your phone the same week

One practical tip: many of these forms ask for a phone number, and your resident registration is smoother when you already have a Japanese one. That's why I help newcomers get connected first. Rakuten Mobile is the plan I point people to — you apply online with just your residence card, and if your phone supports eSIM you can be connected in about 15 minutes, no store visit.

With a number and data in hand, you can look up your ward office's hours, translate the counter signs, and drop your new digits straight onto the move-in form. Check the official page for the latest conditions before you apply — I'll walk you through the phone part.