Finland on a Japanese Licence — IDP + a Left-to-Right Side Switch

Can a Japanese driver legally drive in Finland? Yes — your Japanese licence is accepted with an International Driving Permit recommended alongside it. Sort the IDP in Japan before you fly and keep the Japanese licence, IDP and passport together for the rental desk. But unlike most European corridors, the paperwork is not the thing most likely to catch you out.

The side switch is the headline

Japan drives on the left; Finland drives on the right. This is the single biggest adjustment, and the danger window is your first day — pulling out of a car park, joining a roundabout that now flows the other way, or a reflex glance in the wrong direction at a junction. Take your first hour on quiet roads rather than central Helsinki, and be deliberate at every turn until “wrong” stops feeling like the correct side. Overtaking, in particular, happens from the opposite lane to the one your instincts expect.

Winter doubles the difficulty

Layer the side switch onto Finnish winter and you have a demanding combination. For most Japanese drivers — Hokkaido aside — months of packed snow and ice, December daylight of just a few hours, and a legal winter-tyre season are unfamiliar. Cars hired in the cold months come on proper winter tyres, but the skill that keeps you safe is gentle: long braking distances, smooth steering, no sudden inputs. If your trip is in the dark season, keep drives short and lean on daylight.

Reindeer in the north

In Lapland and the rural north, reindeer wander unfenced roads and step into traffic at dusk, often in groups. The reindeer-zone signs are practical — slow down and be ready to stop for the whole herd.

Limits, alcohol and fines

Summer limits are 50 km/h urban, 80 rural and 120 on motorways, lower in winter. A routine 10 km/h overshoot is a fixed EUR 200, with Finland’s worst speeding penalties scaled to income. The alcohol limit is 0.05, looser than Japan’s strict 0.03, but the safe rule is the same. Fuel is pricey at about €1.98/litre, and the emergency number is 112.

Read the full rules on our Finland driving guide, confirm your documents with the Driving Permit Checker, and estimate any penalty with the Speeding Fine Calculator.