Using Myna Portal: Japan's Online Government Services, Explained

Quick answer

Hi, I'm Miya, and I help newcomers settle into life in Japan. If you already hold a My Number card, Myna Portal is the government's online window, and you sign in by holding that card against the back of your smartphone — there's no separate account to create and no password to forget. Once you're inside you can look at records that used to mean a trip to a counter, receive official notices in one inbox, and start some applications from home. Which functions are actually live depends on your municipality, so let the portal itself show you your own city's menu.

Signing in: your card and your phone

The whole thing is built around the card being your identity. On a smartphone you install the portal's app, choose to log in, type a PIN, and then hold the card flat against the reading area on the back of your phone until the screen confirms it. That contactless read is what proves it is really you, which is why there is nothing else to register first. You can also sign in from a computer if you have a card reader attached, but most people find the phone route quicker and end up staying with it.

Two small things make the read behave. First, take the card out of any wallet or sleeve and take a thick case off your phone, because extra layers and metal get in the way. Second, the reading spot is not in the same place on every phone — it is usually somewhere in the upper half of the back — so slide the card around slowly until it catches, then hold completely still for a couple of seconds. Impatient re-tapping is the most common reason a read fails, and people blame the card when the card is fine.

What you can look up about yourself

The part that surprises people is how much of their own record is simply sitting there waiting. Your pension record is one of them: how your contributions have been logged over the months you have been enrolled, and what that record adds up to going forward. If you have changed jobs, or moved between employee enrolment and the national scheme, this is a practical way to notice a gap early — while it is still easy to take the question to your pension office and sort out.

There is a health side too. Depending on what you have agreed to link, you can see a history of the medical visits and prescriptions recorded through the insurance system, along with results from health checkups. It updates on a delay rather than in real time, so read it as a record rather than a live chart. And to be plain about it, this is information for your own reference, not medical advice — your doctor and your pharmacist are still the people to ask about what any of it means.

Applications you can start from home

The portal also has an application side, and this is where what you see depends most on where you live. Municipalities switch functions on at their own pace, so one city may let you file a childcare enrolment application or a child-allowance procedure entirely online, while the city next door still asks you to come to the counter with paper. Once you have registered your address details in the portal, it shows you the menu that actually applies to you, and that is the only reliable way to know what is available.

The other well-used piece is the link with tax filing. If you file your own return, the portal can pass certain certificates and deduction records straight into the filing system, so you are not retyping figures off paper slips at midnight. You do have to set that linkage up once, in advance, and each issuer has to support it — which is why people set it up long before filing season rather than during it. Tax situations vary and this is not tax advice, so confirm your own case against the National Tax Agency's guidance.

The notification inbox

Sign-in aside, the piece I would actually check on a regular rhythm is the notification inbox. Public bodies — your municipality, the pension system, the health insurance side — can deliver notices to you there instead of, or alongside, paper in your letterbox. For a newcomer that is genuinely useful, because a notice that arrives digitally can be enlarged, translated, saved and re-read at your own pace, rather than puzzled over while standing at the mailbox in the rain.

Two habits stop it from becoming a place things disappear into. Register an email address in your portal settings so you get a nudge when something lands, and allow the app's notifications. Then open it every few weeks even when nothing has pinged. Some notices carry a response window, and not having opened the inbox is not an argument that helps you afterwards. If something looks important and you cannot read it, take it to your ward office counter and ask — they deal with this every day.

The PINs, and what happens when one locks

The most confusing thing for first-timers is that the card does not have one PIN, it has several, all set when you collected it. There is a short numeric one used to prove you are the holder, which is what most everyday sign-ins ask for. There is a longer one mixing letters and numbers, used when you electronically sign something such as a tax return. And there are codes used when a counter or a machine reads the basic details printed on the card face.

So when a screen asks for your PIN, read the label above the box before you type anything. If the screen is asking for the signature one and you keep entering the short numeric one, every attempt is counted as a wrong entry. That mismatch, rather than a bad memory, is what locks most people out of their own card in the first month.

A PIN locks after a small number of consecutive wrong entries, and once it is locked you cannot clear it from the app — that is deliberate. You go in person to the counter at your city or ward office, take the card and your residence card or other photo identification, and expect to set a new number there and then. Some municipalities have added other reset routes, so it is worth checking your own city's page first. For most people, though, the counter visit is the fix, and it is quick once you are standing there.

The line that ties it all together

Step back and you will notice that every part of this runs through your phone. The card is read against the back of it, the notification nudges arrive on it, and the reset and re-registration flows all assume you can receive a message and get online wherever you happen to be standing. In practice a Japanese number with data is the second half of the key: the card is the first half, but on its own it does not open very much at all.

If that is still sitting on your to-do list, it is an easy one to close. You apply online with your residence card, and eSIM-capable phones can often connect the same day — typically about fifteen minutes from applying to being online. Have a look at our setup guide for the step-by-step, and confirm current terms on the page before you apply. Then you can sit down with the portal just once, get properly signed in, and stop wondering what is waiting in that inbox.