Car Insurance in Japan: The Compulsory One and the One You Really Want Too

Quick answer: the two layers of car insurance

Hi, I'm Miya. Car insurance in Japan comes in two layers, and newcomers almost always notice only the first one. The first is jibaiseki-hoken, usually shortened to jibaiseki, which means compulsory automobile liability insurance. Every car and motorcycle on the road has to carry it. It belongs to the vehicle rather than to you, and it is renewed in step with the vehicle inspection.

Here is the part that surprises people. Jibaiseki pays only for bodily injury to other people. It does not pay for the other driver's bumper, the guardrail, the shop window, your own car, or, in most situations, your own injuries when you are the one at fault. All of that sits in the second layer: nin'i hoken, the voluntary policy you buy yourself from an insurance company.

The word voluntary makes it sound optional in the way an extended warranty is optional. In practice, almost everyone I know who drives here carries one, because the compulsory layer stops exactly where the expensive part of an accident begins. Limits and conditions vary a great deal, so treat this as the shape of the system, not as advice about your own situation. For anything specific, read your policy documents and ask your insurer.

Jibaiseki: the layer that rides with the car

Jibaiseki is required by law, and driving without a valid one is treated as a serious offence, not a paperwork slip. Because it attaches to the vehicle, it does not move with you when you change cars. When you buy a used car, whatever remains of its compulsory term generally comes with the vehicle, which is one reason to read the expiry date before money changes hands.

For a regular car, the renewal is usually handled at the same time as shaken, the periodic vehicle inspection, and a dealer or garage will normally arrange it as part of the same visit. Light vehicles and small motorcycles follow their own schedules, so confirm yours rather than assuming it matches a friend's.

You get a certificate, the jibaiseki hoken shomeisho, and it is meant to stay in the vehicle along with the inspection certificate. Mine lives in the glovebox. If you buy privately, from a colleague leaving the country for example, check that certificate yourself and note the expiry date somewhere you will actually see it.

Nin'i hoken: the layer that covers everything else

A voluntary policy is built out of parts, and understanding the parts matters more than understanding any one company's brochure. There is liability for injury to other people above what the compulsory layer handles. There is liability for property damage, called taibutsu, which is the other car, the wall, the vending machine, the crash barrier. There is cover for your own vehicle, often called sharyo, which you can usually include or leave out. And there is cover for injury to you and the people riding with you.

Most policies also bundle services around the insurance itself. Rodo saabisu, roadside assistance, is the common one: towing, a flat tyre, a dead battery, keys locked inside. Whether it is included, and how far a tow reaches, differs from plan to plan, so it belongs on your list of questions.

Then there are the conditions that quietly define who is actually covered. Policies are often written around a driver age condition and a limited range of named drivers, such as you and your spouse, or family living at the same address. If you lend the car to a friend for a weekend and your policy is written narrowly, that trip may sit outside it. I will not tell you which plan to buy. I will tell you to read the driver conditions out loud before you sign.

What the insurer usually asks a foreign resident for

Expect to show your residence card and a licence that is valid for driving in Japan. That might be a Japanese licence, a licence converted through the gaimen kirikae process, or an accepted international permit. Which foreign permits are accepted, and for how long they stay usable once you live here, is a matter for the licence centre and the police, and it varies by issuing country. Confirm your own case with them rather than with a forum post.

You will also need the vehicle's paperwork, principally the inspection certificate, and an address that matches your registered one. Insurers generally want the policy details to line up with your official records, so tell them when you move.

The one that catches experienced drivers out is the no-claims history. Japan uses a grade system, toukyuu, where claim-free years move you up and a claim moves you down. A clean record built in another country usually does not transfer, and you would typically begin where a new driver begins. There are narrow exceptions in some circumstances, so ask rather than assuming either way, and bring a letter from your previous insurer to the conversation. Ask about language support while you are there, since policy documents and the claims line are generally in Japanese and what each company offers in other languages differs.

At the roadside: what to actually do after an accident

Stop. Even for something that feels trivial, leaving the scene is treated very seriously here. Put your hazard lights on, and if the car is drivable and blocking traffic, move it somewhere safer first. Set out the warning triangle and get yourself out of the traffic lane.

Check for injuries, yours and everyone else's. If anyone is hurt at all, call 119 for an ambulance, and do not try to judge how bad it is from how someone looks in the first minute. Then call 110 and report the accident to the police. Call them even for a parking lot scrape, and even if the other party is friendly and suggests handling it between yourselves. The police record is what allows an accident certificate, jiko shomeisho, to be issued later, and your insurer will generally need that document to process anything.

Exchange details calmly: name, address, phone number, licence, the vehicle's plate, and the other party's insurer if they will share it. If it is safe, photograph the scene before the cars are moved, then the damage on both vehicles, the road, and any signs nearby. Write down the time and the location.

Do not settle privately on the spot. Do not accept or offer cash, do not agree about whose fault it was, and do not sign anything you cannot read. Injuries and damage have a habit of appearing the next morning, and fault is something the insurers work out afterwards with the police record in front of them. Call your own insurer from the scene. Most policies have an accident line that answers around the clock, and many now let you log and track the claim through an app afterwards.

Small things worth doing before you need any of this

Put three dates in your calendar, because they rarely fall in the same month: the vehicle inspection, the compulsory insurance expiry, and your voluntary policy renewal. Set the reminders early, so a renewal never depends on you noticing a letter in Japanese during a busy week.

Keep the certificates in the car. Save a photo of your policy number and your insurer's accident line on your phone, and write the same details on a card in your wallet, because phones break in exactly the situations where you need them. Know where your warning triangle is stored, ideally before the night you need it in the rain.

Tell your insurer when your life changes: a new address, a different car, a new person driving regularly. Out-of-date details turn a straightforward claim into a long one.

The one thing you cannot improvise on a roadside

Look back at what an accident actually asks of you. Call 110. Call an ambulance if anyone is hurt. Call your insurer's accident line and answer questions in Japanese while standing on a verge. Photograph the scene, look up where you are, maybe open the insurer's app to start the claim. Every one of those steps runs through your phone, and a live Japanese line is the one part you cannot improvise or borrow from a cafe's wifi.

That is why I nudge new drivers to sort the phone out before the car. A Japanese number means the police and your insurer can call you back, and mobile data means you can pull up your policy details from the roadside instead of from a drawer at home.

With Rakuten Mobile you can apply online with your residence card, and if your phone supports eSIM you can usually be connected the same day, often in around fifteen minutes. Check the current conditions on the setup guide and the official page before you apply, since terms change. Get that piece in place, and the rest of driving here is the ordinary business of renewals, certificates and paying attention at intersections.