Japan on an Australian Licence — the IDP Catch & a 0.03 Alcohol Cliff

The one-line answer: you can drive in Japan on an Australian licence, but only with an International Driving Permit beside it. Smartraveller, the Australian government’s travel advice, says you must hold either a Japanese licence or a valid IDP and a current Australian licence. After 365 days in the country you need a Japanese licence. Get the permit before you leave, because it cannot be arranged in Japan.

Which permit: the 1949 one

Japan recognises the IDP issued under the 1949 Geneva Convention. Australia issues exactly that, and your state motoring club is the usual place to apply. Rental counters will turn away a licence without the permit, and driving without one counts as driving unlicensed. Carry the licence, the permit and your passport together. The Driving Permit Checker confirms what other countries on your itinerary expect.

Same side, different numbers

Australia and Japan both drive on the left. The steering wheel is on the right, roundabouts turn the way you know, and the first hour needs no rewiring of reflexes. The numbers, however, are not Australian:

Japan’s record also notes that from September 2026 narrow residential roads default to 30 km/h. Treat any unmarked street as one of those. Because Japanese ordinary roads feel slow after Australian highways, the temptation to pick up speed is real, and the cameras do not forgive it.

Alcohol is stricter than your instincts say

The legal limit is 0.03, against Australia’s 0.05. Smartraveller goes further and says it is illegal to drive with any alcohol in your bloodstream. Passengers who knowingly let a drinker drive, and the bar that served them, can face penalties as well. There is no sensible “one beer” margin.

What fines look like

Penalties are fixed amounts rather than the percentage-based bands you may know from Australian states:

• Under 15 km/h over (ordinary car): JPY 9,000.
• Roughly 20 km/h over: JPY 15,000 to JPY 18,000 and 1 to 2 points.
• 30 km/h or more over: JPY 25,000 or more, 6 points and a licence suspension on regular roads.
• Phone in hand: JPY 18,000 and 3 points.
• Red light: JPY 9,000 and 2 points.

Back home a speeding fine runs AUD 200 to AUD 350 for the lowest band. The speeding fine calculator turns a km/h figure into an estimate for either country.

Collecting the car

At the counter, hand over the Australian licence, the 1949 permit and your passport together. Ask the staff to show you the fuel type, how to open the fuel flap and how the in-car map is set up. Photograph any marks on the body before leaving, and keep the rental contract in the glovebox with the permit. If the car is a rental with a map unit set to Japanese, ask for the English setting at pickup rather than fiddling with it on the move.

Snow and winter equipment

Smartraveller warns that heavy snowfall and ice in winter can make driving dangerous, especially if you are not used to it. Check that the vehicle has the necessary equipment, including snow tyres, chains and a dig-out kit. If your trip is a ski holiday in the north, ask the rental firm what the car carries before you accept the keys.

Police, emergencies and help in English

Dial 110 for police and 119 for fire or an ambulance. At home it is 000 for all three. For non-emergencies Smartraveller gives the police line #9110, available on weekdays during office hours, and says to ask for “tsuyaku” (interpreter) if you need English. After any incident, get a police report. The Japan driving guide covers the rest.

Sources

• Smartraveller (Australian Government), Japan travel advice (driving permit; 365 days; any alcohol illegal; winter equipment; 110, 119 and #9110): smartraveller.gov.au