Ireland for Japanese Drivers — Same Side, Faster Roads, Narrow Lanes

Of all the things that trip up tourists in Ireland, the big one — driving on the left — is already second nature to Japanese visitors. That frees you to focus on the two differences that actually matter.

Same side, so it starts easy

Both Japan and Ireland drive on the left, so you sit on the correct side of the cabin and roundabouts turn the familiar way from the first minute. No relearning, no nervous first hour fighting your reflexes — the muscle memory transfers cleanly.

Faster motorways, tighter lanes

The contrasts are pace and width. Irish motorways allow 120 km/h against the 100 km/h you’re used to at home, so traffic moves a touch quicker than you might expect — settle in and use the cruise control. The rural network swings the other way: hedge-lined lanes, often without a centre line, where two cars barely pass. Slow right down when you meet oncoming traffic and use the passing bays rather than forcing through.

Permit and the drink-drive line

An International Driving Permit is recommended for Japanese drivers — Japan issues the 1949 Geneva permit that Ireland recognises, so carry it with your licence and passport. Arrange it before you fly; the Driving Permit Checker confirms the detail and your licence covers stays up to 12 months. Ireland’s drink-drive limit is 0.05 BAC, slightly higher than Japan’s 0.03, but enforcement is firm so stay well clear.

Fines, fuel and numbers

Limits run 50 km/h in towns, 80 rural, 120 on motorways, with fixed cameras and mobile patrols. A speeding fixed charge is EUR 80 plus 3 penalty points — work yours out on the Speeding Fine Calculator. Petrol is roughly $1.82/litre and the emergency number is 112. The full rules are on our Ireland driving guide.