The permit you need, the two limits that catch Americans out, and the rental gotcha nobody warns you about — sourced from our Japan driving-laws record.
By WentLocal Editorial Team · Published 2026-08-04
Renting a car in Japan is straightforward right up until it is not. The paperwork has one hard requirement that cannot be fixed at the counter, and two numbers differ sharply from what an American driver is used to. Everything below comes from our Japan driving-laws record. Where our record does not hold a figure, this guide says so rather than guessing — do not take a legal number from anywhere that will not show you its source.
Visitors drive on their home licence plus a 1949 Geneva Convention International Driving Permit, valid for up to one year from entry. An International Driving Permit is required — you cannot rent on a US licence alone, and you cannot obtain the permit after you land. Get it before you fly.
One trap worth spelling out: 1968 Vienna Convention IDPs are not valid in Japan. If your permit was issued under the wrong convention it is worthless at the rental desk. Holders of Swiss, German, French, Belgian, Monegasque or Taiwanese licences may instead use an official Japanese translation (JAF, ADAC, or the issuing authority). US licence holders take the Geneva route.
Minimum driving and rental age is 18.
You drive on the left, in a right-hand-drive car. Two flips at once: the road side and the seat side.
Speeds are posted in km/h. Our record has the typical urban limit at 60 km/h and the typical expressway limit at 100 km/h. In familiar terms, 100 km/h is roughly 62 mph — an expressway number that looks fast and is not.
The alcohol limit is 0.03 BAC. That is the figure in our record, and it is well under a third of the 0.08 that most US states use. Practically, this is a zero-drinks limit, not a one-drink limit.
This is the part with no American equivalent. Drink-driving liability in Japan extends beyond the person behind the wheel: anyone who supplied the alcohol or the car — and even a passenger who rode along — can be fined or jailed. Causing death while impaired carries up to 20 years.
If you are the sober one in the group, you are not a bystander in the eyes of the law.
Expressways and some tunnels and scenic roads are tolled. You take a ticket on entry and pay cash or card on exit in the General lane, or you use an ETC transponder lane.
Here is the trap: the rental car has an ETC unit but usually no ETC card. You must rent the card separately or you cannot use the ETC lanes at all — and if you drift into one without a card, you will be stopping in a live toll lane. Ask for the ETC card explicitly when you collect the vehicle.
Two more rental conditions in our record: most Hokkaido rentals may not leave the island, and cars must be returned with a full tank.
Our record lists 119 as the roadside emergency number for Japan. That is the number we hold; we do not hold a separate breakdown-service number, so arrange roadside assistance through your rental company at pickup and keep their number in your phone.
Our Japan record does not carry figures for motorway minimum speeds, child-seat age thresholds, or per-prefecture parking rules — so this guide does not state any. For anything with a legal consequence that is not listed above, check with the rental company or the Japan Automobile Federation before you drive. A guide that invents a number to look complete is worse than one that stops.
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