Japan vs South Korea: Driving Rules Compared

The biggest change between Japan and South Korea happens before any speed sign: Japan drives on the left, South Korea on the right. Motorway limits sit at 100 versus 110 km/h, and the side-by-side below shows where else the two rulebooks diverge.

An important difference is the driving side: Japan drives on the left, while South Korea drives on the right. Drivers crossing between the two countries must exercise extra caution, particularly at junctions, roundabouts, and when overtaking.

Speed Limits Comparison

Speed limits are one of the first things drivers notice when crossing borders. Japan and South Korea take notably different approaches.

In Japan, the standard speed limits are 40 km/h in urban areas, 60 km/h on rural roads, and 100 km/h on motorways. Drives on the left. Zero-tolerance approach to drink-driving — passengers who allow a drunk person to drive can also be penalised. Toll expressways are expensive. International Driving Permit (Geneva Convention type only) is required for foreign drivers.

In South Korea, the limits are 50 km/h in urban areas, 80 km/h on rural roads, and 110 km/h on motorways. Aggressive driving is common in cities, especially Seoul. Speed cameras and traffic enforcement cameras are widespread. Toll expressways connect major cities. Foreign drivers need an IDP or Korean licence.

Key Speed Limit Differences

South Korea generally allows higher motorway speeds. Drivers transitioning between Japan and South Korea should pay close attention to posted signs, as assumptions based on one country’s rules can lead to speeding tickets in the other. Speed cameras are common in both countries, and enforcement can be strict.

Traffic Rules and Regulations

Beyond speed limits, Japan and South Korea have several important differences in their general traffic rules.

Driving side: Japan drives on the left; South Korea drives on the right. This is a critical difference that drivers must adapt to immediately when crossing between the two countries.

If you plan to drive in both countries, the change from left-hand traffic to right-hand traffic (or vice versa) is one of the biggest adjustments. Take your time, stay alert at intersections, and consider renting a locally-configured vehicle.

Minimum driving age: The minimum age to drive a car is 18 in Japan and 18 in South Korea. Both countries set the same minimum driving age.

Mobile phone use: Using a handheld mobile phone while driving is illegal in both countries. In Japan, the penalty is JPY 18,000 (approx. EUR 115) + 3 points. In South Korea, the penalty is KRW 70,000 (approx. EUR 48) + 15 points. Hands-free devices are generally permitted in both countries, but drivers should keep their attention on the road.

Seatbelts: Seatbelts are mandatory for all occupants in both Japan and South Korea. The fine for not wearing a seatbelt is Warning / 1 point (no fine for first offence) in Japan and KRW 30,000 (approx. EUR 20) in South Korea.

Running a red light: Red-light violations carry serious penalties. In Japan, expect JPY 9,000 (approx. EUR 55) + 2 points. In South Korea, the penalty is KRW 60,000 (approx. EUR 42) + 15 points.

Alcohol and DUI Laws

Drink-driving laws represent one of the areas where countries diverge most significantly.

Japan sets its blood alcohol concentration (BAC) limit at 0.03%. This is among the strictest limits in the world.

South Korea has a BAC limit of 0.03%. This very low limit reflects an extremely cautious approach to road safety.

Both countries share the same BAC limit of 0.03%, so drivers can apply the same level of caution in either country.

In both countries, penalties for drink-driving include fines, licence suspension, and potential imprisonment for serious offences. New and young drivers often face stricter limits in both Japan and South Korea. The safest approach is always to avoid any alcohol before driving.

Tyre and Equipment Requirements

Tyre regulations and mandatory vehicle equipment differ between Japan and South Korea, and non-compliance can result in fines, especially during winter.

Winter Tyres

• Japan: Winter tyres are situational. Period: Prefectural regulations; Hokkaido, Tohoku require winter tyres in winter. Studded tyres: restricted. Minimum tread depth: 1.6 mm.
• South Korea: Winter tyres are False. Period: Not specified. Studded tyres: restricted. Minimum tread depth: 1.6 mm.

The difference in winter tyre requirements means drivers must check and comply with each country’s rules separately, especially when planning cross-border winter trips.

Mandatory Equipment

Speeding Penalties

The financial consequences of speeding vary between Japan and South Korea.

In Japan, a minor speeding offence (approximately 10 km/h over the limit) typically results in: JPY 9,000 (approx. EUR 55) + 1 point. Penalties escalate significantly for higher speeds, and repeat offenders face licence suspension.

In South Korea, the same level of speeding (approximately 10 km/h over) incurs: KRW 30,000 (approx. EUR 20). The difference in penalty severity can be substantial, so drivers should be aware of the local consequences.

Both countries use a combination of fixed speed cameras, mobile speed traps, and in some cases average speed (section control) cameras. Radar detectors are illegal or restricted in most jurisdictions.

Licence Requirements for Visitors

International visitors planning to drive in either country should understand the licence requirements.

Japan: A valid driving licence from your home country is accepted for short visits. For visitors from outside the country, an International Driving Permit (IDP) is strongly recommended alongside your home licence.

South Korea: A valid driving licence from your home country is accepted for short visits. For visitors from outside the country, an IDP is recommended.

Always carry your licence (and IDP if applicable) while driving, as police may request to see it during routine checks or traffic stops.

Road Conditions and Infrastructure

The driving experience differs between Japan and South Korea in terms of road quality, infrastructure, and overall driving culture.

Japan

Excellent — superbly maintained roads and expressways with advanced signage and technology.

South Korea

Excellent — modern and well-maintained road infrastructure with extensive expressway network.

Emergency Numbers

In case of an emergency while driving, it is essential to know the local numbers:

In an emergency, dial the local numbers listed above. If you are unsure, 112 is widely recognized internationally.

Practical Tips for Driving in Both Countries

If you are planning to drive in both Japan and South Korea, here are some practical tips to keep in mind:

1. Research before you go. Familiarize yourself with the specific rules of each country before your trip. Print or save a summary of key rules for quick reference.

2. Carry the right documents. Ensure you have your driving licence, IDP (if needed), vehicle registration, and insurance documents. Some countries require you to carry these at all times.

3. Adjust to speed limits immediately. When crossing the border, speed limits change. Look for signs and adjust your driving accordingly. Do not rely on habits from the other country.

4. Equip your vehicle properly. Ensure you have all mandatory equipment for both countries. It is better to carry extra items than to face a fine for missing equipment.

5. Understand toll systems. Japan and/or South Korea may have toll roads. Research whether you need a vignette, transponder, or cash for tolls.

6. Be aware of environmental zones. Many cities have low-emission zones that restrict older vehicles. Check if you need an environmental sticker for either country.

7. Use a GPS or navigation app. Modern navigation apps often include speed limit warnings, toll information, and real-time traffic updates that can help you comply with local rules.

8. Learn key phrases. If you do not speak the local language, learn basic driving-related phrases. In an emergency, being able to communicate with police or paramedics can be invaluable.

Which Country Is Easier for Tourists to Drive In?

For tourists from right-hand-traffic countries, South Korea will feel more natural. However, Japan has clear signage and driving there becomes comfortable after a short adjustment period.

Ultimately, the “easier” country depends on your personal experience and where you are from. The biggest challenge is adapting to driving on the opposite side of the road.

Frequently Asked Questions

Can I drive in South Korea with a Japan driving licence?

You will typically need a valid driving licence from Japan along with an International Driving Permit (IDP) to drive in South Korea. Check the latest requirements with the embassy of South Korea before your trip.

What is the speed limit on motorways in Japan compared to South Korea?

The motorway speed limit in Japan is 100 km/h, while in South Korea it is 110 km/h. Always watch for posted signs, as limits may vary on specific sections due to roadworks, weather, or local restrictions.

Are winter tyres mandatory in Japan or South Korea?

In Japan, winter tyres are situational (Prefectural regulations; Hokkaido, Tohoku require winter tyres in winter). In South Korea, they are False (Not specified). If you are travelling during winter months, it is advisable to use winter tyres regardless of legal requirements for safety.

Which country has stricter drink-driving laws?

Japan has a BAC limit of 0.03% and South Korea has a limit of 0.03%. Both countries have the same limit, so the strictness is comparable. Penalties in both countries are serious and can include licence suspension, heavy fines, and imprisonment.

Do I need a warning triangle in Japan and South Korea?

In Japan, a warning triangle is not specifically required by law. In South Korea, it is not specifically required by law. Carrying one is always a good idea for safety, even where it is not legally required.

What side of the road do they drive on in Japan and South Korea?

Japan drives on the left side and South Korea drives on the right side of the road. This is an important difference that requires careful adjustment when switching between the two countries.

Can I use my car insurance from Japan in South Korea?

International motor insurance requirements vary. Check with your insurer whether your policy covers driving in both countries. You may need a Green Card or separate international coverage.

What emergency number should I call while driving in Japan or South Korea?

In Japan, the general emergency number is 110 (police: 110, ambulance: 119). In South Korea, call 112 (police: 112, ambulance: 119). When in doubt, try dialing 112, which is widely recognized internationally.