Japan vs Slovenia: Driving Rules Compared

Slovenia allows supervised driving from age 16, with an unrestricted licence available at 18; Japan makes every driver wait the full two years to 18 before starting at all. The two also drive on opposite sides of the road, Japan on the left and Slovenia on the right. Winter tyres are mandatory by fixed date in Slovenia, 15 November to 15 March, while Japan’s rule depends on the prefecture.

One of the biggest differences between Japan and Slovenia is the driving side: Japan uses left-hand traffic, while Slovenia uses right-hand traffic. Drivers need to be especially cautious at intersections and roundabouts during the transition.

Speed Limits Comparison

Speed limits differ between Japan and Slovenia, and understanding these differences is essential for avoiding fines.

Japan sets its speed limits at 40 km/h in cities and towns, 60 km/h on country roads, and 100 km/h (100 km/h standard; 120 km/h on select expressway sections (Shin-Tomei, Tohoku, Joban). From Sept 2026, narrow residential roads default to 30 km/h) on motorways.

Slovenia sets its speed limits at 50 km/h in cities and towns, 90 km/h on country roads, and 130 km/h on motorways.

Key Speed Limit Differences

Pay attention to signage when driving between Japan and Slovenia. Speed camera enforcement styles may differ, and ignorance of local limits is not accepted as an excuse.

Traffic Rules and Regulations

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

Driving side: Japan drives on the left; Slovenia drives on the right. This is a major difference that requires careful adjustment.

Minimum driving age: The minimum age to drive a car is 18 in Japan and 16 in Slovenia.

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 Slovenia, the penalty is EUR 120 + 3 penalty 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 Slovenia. The fine for not wearing a seatbelt is Warning / 1 point (no fine for first offence) in Japan and EUR 120 in Slovenia.

Running a red light: Red-light violations carry serious penalties. In Japan, expect JPY 9,000 (approx. EUR 55) + 2 points. In Slovenia, the penalty is EUR 250 + 4 penalty points.

Alcohol and DUI Laws

Understanding each country’s approach to drink-driving is critical, as enforcement and penalties vary considerably.

Japan sets its blood alcohol concentration (BAC) limit at 0.03%.

Slovenia has a BAC limit of 0.05%.

The lower limit in Japan means that even a small amount of alcohol could put you over the legal limit. Adjust your behaviour accordingly.

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 (typically 0.00% to 0.02% BAC) in both Japan and Slovenia. 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 Slovenia, 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.
• Slovenia: Winter tyres are mandatory. Period: 15 Nov - 15 Mar. Studded tyres: prohibited. Minimum tread depth: 1.6 mm.

Mandatory Equipment

If renting a vehicle, verify with the agency that it includes mandatory equipment for both Japan and Slovenia, especially if you plan to cross the border.

Speeding Penalties

The financial consequences of speeding vary between Japan and Slovenia.

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 Slovenia, a minor speeding offence (approximately 10 km/h over the limit) typically results in: EUR 50-120. Penalties escalate significantly for higher speeds, and repeat offenders face licence suspension.

Both countries use a combination of fixed speed cameras, mobile speed traps, and in some cases average speed (section control) cameras.

Licence Requirements for Visitors

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

Japan: An IDP is required. Visitors can typically drive for up to 12 months on a foreign licence IDP required (1949 Geneva Convention only). US, UK and many EU licences need specific IDP. Drives on the left.

Slovenia: An EU/EEA driving licence is valid. An IDP is recommended for non-EU licence holders. Visitors can typically drive for up to 12 months on a foreign licence EU/EEA licences valid. Non-EU visitors need IDP.

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

Emergency Numbers

Save these emergency numbers before travelling to Japan or Slovenia:

Save these numbers in your phone before travelling. In an emergency, quick access to the correct number is crucial.

Practical Tips for Driving in Both Countries

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

1. Plan fuel stops. Fuel prices and station availability can vary significantly. In some regions, stations may close at night or on Sundays.

2. 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.

3. 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.

4. Check insurance coverage. Verify that your motor insurance or rental agreement covers driving in both countries. A Green Card may be required for cross-border travel.

5. 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.

6. Watch for different road signs. While European countries share many sign conventions, there are country-specific signs you should recognise. Review a local driving guide before your trip.

7. Understand toll systems. Research whether you need a vignette, transponder, or cash for tolls in each country.

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

Which Country Is Easier for Tourists to Drive In?

Which country is easier to drive in depends on your experience level, where you are from, and what conditions you are used to.

Based on tourist ratings, Japan scores 3.0/5 (Moderate). Left-hand driving, expensive tolls, excellent roads, kanji signage

Based on tourist ratings, Slovenia scores 2.2/5 (Easy). Small country, good motorways, vignette needed, scenic mountain roads

The switch between left-hand traffic in Japan and right-hand traffic in Slovenia is the single biggest adjustment drivers will face.

Frequently Asked Questions

Can I drive in Slovenia with a Japan driving licence?

Rules vary by nationality. Check the specific licence requirements for each country, and consider obtaining an International Driving Permit (IDP) before your trip.

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

The motorway speed limit in Japan is 100 km/h (100 km/h standard; 120 km/h on select expressway sections (Shin-Tomei, Tohoku, Joban). From Sept 2026, narrow residential roads default to 30 km/h), while in Slovenia it is 130 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 Slovenia?

In Japan, winter tyres are situational (Prefectural regulations; Hokkaido, Tohoku require winter tyres in winter). In Slovenia, they are mandatory (15 Nov - 15 Mar). 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 stricter BAC limit (0.03%) compared to Slovenia (0.05%). Lower limits mean less alcohol is tolerated before driving becomes illegal.

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

Japan drives on the left side and Slovenia drives on the right side of the road.

Can I use my car insurance from Japan in Slovenia?

International motor insurance coverage varies by provider and policy. Contact your insurer before travelling to confirm coverage in both Japan and Slovenia. You may need to purchase additional local insurance.

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

In Japan, the general emergency number is 110 (police: 110, ambulance: 119). In Slovenia, call 112 (police: 112, ambulance: 112). Save both numbers in your phone before you travel.