Driving in Japan vs Your Home Country: Key Differences to Know

If you have been driving in the US, Europe, or Southeast Asia, Japan will feel familiar in some ways and completely foreign in others. Beyond the obvious switch to left-hand traffic, Japan has dozens of rules, customs, and road conditions that differ from what you are used to. Understanding these differences is the key to passing both the gaimen kirikae test and surviving your first weeks behind the wheel.

Left-Hand Traffic

Japan drives on the left side of the road. If you come from the US, Continental Europe, or most of Asia, this is the single biggest adjustment. Everything is mirrored:

• The driver sits on the right side of the vehicle
• You pass (overtake) other vehicles on the right
• Left turns are the easy (minor) turn; right turns cross oncoming traffic
• Roundabouts flow clockwise
• Highway on-ramps and off-ramps are on the left
• The indicator stalk is typically on the right side; the wiper stalk is on the left. New drivers from right-hand-traffic countries frequently activate wipers instead of indicators

Speed Units and Limits

Japan uses kilometres per hour (km/h). If you are from the US or UK, you need to mentally adjust:

• Default speed on regular roads: 60 km/h (approximately 37 mph) — much lower than US highway speeds
• Default expressway speed: 100 km/h (approximately 62 mph) — some sections allow 120 km/h
• Residential zones: Commonly posted at 30 km/h (approximately 19 mph)
• Speed enforcement: Japan uses both fixed speed cameras (ovis) and unmarked patrol cars. Fines are significant and accumulated points lead to licence suspension

In practice, traffic on Japanese expressways often flows at 100-120 km/h. On residential streets, the posted 30 km/h feels slow until you encounter the narrow roads that make it essential. See our Speed Limits topic for practice questions.

Narrow Streets and Residential Roads

Japan's residential streets are dramatically narrower than those in most Western countries. Many streets in cities and older neighbourhoods are only wide enough for one car. This creates a driving culture that is very different from what you might be used to:

• Yielding in narrow streets: When two cars meet on a narrow street, one driver must pull over to let the other pass. There is an unwritten etiquette about who yields first (typically the driver with more space to pull over)
• Mirrors on corners: Convex mirrors (kakyomen) are mounted at blind corners throughout residential areas to help drivers see approaching traffic
• No sidewalks: Many residential streets have no separate sidewalk. Pedestrians, cyclists, and cars share the road
• Utility poles: Narrow streets often have utility poles on the edge of the road, further reducing width

The Railway Crossing Rule

This deserves its own section because it is the most important difference for the gaimen kirikae test and real-world driving. In most countries, you stop at railway crossings only when barriers are down or warning lights are flashing. In Japan, you must come to a complete stop before every railway crossing, every time, no exceptions (unless directed by a police officer).

After stopping, you must look both ways and listen for approaching trains before proceeding. You must also not change gears while on the crossing itself. Practice with our Railway Crossings topic.

Kei Cars (Keijidosha)

Kei cars are a uniquely Japanese vehicle category. These small vehicles (maximum 660cc engine, 3.4 metres long, 1.48 metres wide) are everywhere in Japan, particularly in rural areas. They are identifiable by their yellow licence plates (white plates for standard vehicles).

• Kei cars have lower taxes, cheaper insurance, and in some rural areas do not require a parking space certificate
• Their smaller size makes them ideal for Japan's narrow streets
• They are legal on expressways but may struggle with acceleration on uphill on-ramps due to their small engines

Expressway Rules

Japanese expressways (kosokudoro) have rules that differ from motorways and freeways in other countries:

• Tolls: Almost all Japanese expressways are toll roads. The ETC (Electronic Toll Collection) system is the standard payment method. Without an ETC card, you must stop at toll booths and pay cash or by credit card
• Minimum speed: 50 km/h on most expressways. Driving below this speed (except in congestion) is illegal
• Mopeds prohibited: Vehicles under 125cc are not allowed on expressways
• Learner drivers prohibited: Drivers with a provisional licence cannot use expressways
• Rest stops: Service Areas (SA) offer fuel, food, shops, and toilets. Parking Areas (PA) offer basic facilities. They are spaced every 50-80 km and are well-maintained
• Emergency phones: Located every 1 km on expressways, connecting directly to the expressway management centre

See our Expressway Driving topic for dedicated practice.

Zero-Tolerance Drunk Driving

Japan's drunk driving laws are among the strictest in the world. The legal blood alcohol limit is 0.03%, which means even one beer can put you over the limit. Penalties include:

• Up to 5 years imprisonment and fines up to 1,000,000 yen
• Immediate licence revocation
• Criminal liability for passengers who knew the driver had been drinking
• Criminal liability for the person who provided the vehicle
• Criminal liability for the person who served the alcohol

If you come from a country with higher alcohol limits (0.05% or 0.08%), adjust your expectations. The safest approach is zero alcohol before driving.

Seasonal Driving Considerations

Japan's geography means dramatically different driving conditions depending on the season and region:

• Winter (December-March): Heavy snowfall in Hokkaido, Tohoku, and the Sea of Japan coast. Winter tyres or chains are legally required in many regions. Black ice is common
• Rainy season (June-July): Extended heavy rain (tsuyu) causes flooding, reduced visibility, and hydroplaning risks on expressways
• Typhoon season (August-October): Typhoons bring extreme winds and flooding. Expressways may be closed. Check weather warnings before long drives
• Summer (July-August): Obon holiday period brings extreme traffic congestion on expressways. Journey times can double or triple

Cultural Driving Differences

• Horn use is minimal: Japanese drivers rarely use the horn except where legally required (horn signs). Excessive honking is considered rude
• Hazard lights as thanks: Drivers flash hazard lights briefly (2-3 blinks) to say thank you after being let into traffic. This is a universal custom
• Pedestrian priority: Drivers are expected to stop and wait for pedestrians at unmarked crossings. In practice, compliance is high in cities
• Queue discipline: Drivers rarely cut into queues. Lane merging follows a strict zipper pattern
• Clean cars: Most Japanese drivers keep their vehicles very clean. Mud-splattered or visibly dirty cars are uncommon

Key Takeaways

• Left-hand traffic affects everything from turns to roundabout direction to indicator stalks
• Default speeds are lower than most Western countries (60 km/h regular, 100 km/h expressway)
• Narrow residential streets require a completely different driving approach
• Railway crossing stops are mandatory every time — the most critical Japan-specific rule
• Zero-tolerance drunk driving with liability for passengers and vehicle providers
• Seasonal conditions dramatically affect driving — winter tyres, typhoons, and holiday congestion