Using Car Navigation Systems When Renting a Car in Japan

One of the most common challenges for overseas visitors driving in Japan is navigation. Unlike many countries where a smartphone app alone is sufficient, Japan's complex road networks, frequent tunnels, and mountainous terrain make the built-in car navigation system an essential tool for a safe and stress-free journey. Understanding how to use both the in-car GPS and your smartphone effectively will make a significant difference in your rental car experience.

Understanding the Built-In Car Navigation System

Almost all rental cars in Japan come equipped with a built-in car navigation system as standard. These systems are designed specifically for Japan's road network and offer several advantages over smartphone apps. The most important feature to understand is the MAPCODE system. Rather than entering a full Japanese address, you simply input a short numeric code — typically 6 to 10 digits — that pinpoints virtually any destination in Japan. Every major tourist attraction, hotel, restaurant, and scenic viewpoint has its own MAPCODE, which you can look up in advance on websites such as mapion.co.jp or through the destination's official website.

To set a destination using MAPCODE, press the MENU button on the navigation screen, select Destination, then choose MAPCODE from the input options. Enter the code and confirm. The system will immediately calculate the optimal route. Alternatively, most built-in systems also accept a destination's phone number as an input method — a practical option for hotels, restaurants, and shops that have listed contact numbers.

Switching the Navigation Language to English

Many modern rental car navigation systems in Japan support multiple languages, including English, Simplified Chinese, and Korean. To switch to English, access the system settings through the MENU button and look for a language or display settings option. The exact steps vary slightly by model, but most Toyota, Nissan, and Honda rental vehicles follow a similar procedure. If you are unsure, the rental counter staff can assist you with the initial setup before you drive away.

Using Google Maps and Smartphone Apps as a Supplement

While the built-in navigation system is your primary tool, Google Maps remains a valuable supplement for planning and research. Before your trip, download an offline map of the region you will be visiting through the Google Maps app. This allows you to browse maps and search for locations even without a mobile data connection. However, be aware that turn-by-turn navigation and real-time traffic updates require an active internet connection.

For drivers who prefer a smartphone-based solution, Yahoo! Car Navigation (Yahoo!カーナビ) is widely regarded as one of the best free navigation apps for driving in Japan. It provides accurate real-time routing, speed camera alerts, and detailed expressway guidance. The app is primarily in Japanese, but its interface is intuitive enough for non-Japanese speakers to use with basic familiarity.

Tips for Setting Expressway Routes

When planning a longer drive that includes expressways, make sure to configure your navigation system to include or exclude toll roads according to your preference. Built-in systems typically offer route options such as fastest route, no toll roads, or shortest distance. If you have rented an ETC card from the rental company, selecting the expressway route is recommended for both speed and convenience, as ETC lanes allow you to pass through toll gates without stopping.

Practical Advice Before You Drive

There are a few practical steps worth taking before you leave the rental lot. First, confirm that the navigation system's language is set to your preference. Second, look up the MAPCODEs for your key destinations — your hotel, major attractions, and the rental car return location — and note them down or save them on your phone. Third, if you plan to use Google Maps, download the offline map for your region while you still have Wi-Fi access at the airport or hotel. Finally, keep your smartphone charged using the car's USB port or a car charger, so it remains available as a backup navigation tool throughout your journey.

With a little preparation, navigating Japan's roads by rental car becomes a smooth and enjoyable experience. The combination of a reliable built-in GPS and a smartphone app gives you the flexibility to explore both well-known destinations and hidden local gems with confidence.

Understanding Gas Stations in Japan

When renting a car in Japan, knowing how to navigate local gas stations is essential for a smooth road trip. Gas stations in Japan are divided into two main categories: full-service (manned) and self-service stations. Full-service stations are highly convenient for foreign visitors who may not be familiar with the local language or equipment. As you pull in, staff members will direct you to the correct pump, ask for your preferred fuel type and amount, and handle the entire refueling process. On the other hand, self-service gas stations are becoming increasingly common across the country. These stations require you to operate the touch screen terminal, select your fuel, and pump the gas yourself. While the terminals are usually in Japanese, they follow a standard color-coded system that makes them easy to use once you know the basics.

Identifying the Correct Fuel Type

Using the correct fuel is critical to avoid damaging your rental car's engine. In Japan, there are three main types of fuel available at all gas stations, and they are universally color-coded for easy identification. The most common fuel type for standard rental cars is "Regular" unleaded gasoline, which is always indicated by a red nozzle. If you are renting a luxury or sports vehicle, it might require "High-Octane" gasoline, marked with a yellow nozzle. Finally, diesel fuel, typically used for larger vans or specific SUV models, is indicated by a green nozzle. Before leaving the rental office, always confirm the required fuel type with the staff. Additionally, you can usually find a sticker indicating the correct fuel type on the inside of the car's fuel door.

How to Use a Self-Service Gas Station

Refueling at a self-service station is a straightforward process. First, pull up to the pump ensuring that your car's fuel door is on the correct side, and turn off the engine. Approach the touch screen terminal and press the start button. You will be prompted to select your payment method; you can choose between cash or a credit card. If you choose cash, insert your bills into the machine before proceeding. Next, select the fuel type (Red for Regular) and the amount you want to pump. If you are preparing to return your rental car, look for the "Full Tank" (満タン) button. After confirming your selection, open your car's fuel cap, remove the color-coded nozzle, and insert it into the fuel port. Squeeze the handle to start pumping; it will automatically stop when the tank is full or the specified amount is reached. Return the nozzle to the pump, and don't forget to collect your receipt and any change.

Important Rules for Returning Your Rental Car

The standard policy for most rental car companies in Japan is the "full tank return" rule. This means you must return the vehicle with a completely full tank of gas. It is highly recommended to refuel at a gas station located as close to the rental return location as possible, ideally within a few kilometers. When you return the car, the rental staff will check the fuel gauge. In many cases, they will also ask to see the receipt from your final refueling to verify that the gas was purchased recently and near the shop. Therefore, it is crucial to keep the receipt after you fill up. If you fail to return the car with a full tank, the rental company will calculate the missing fuel based on the distance driven and charge you a premium rate that is often higher than standard gas station prices.

Tips for a Hassle-Free Refueling Experience

To ensure a hassle-free experience, plan your refueling stops in advance, especially if you are driving in rural areas or mountainous regions like Hokkaido or the Japanese Alps, where gas stations can be sparse and may close early in the evening. In urban areas, you will find 24-hour self-service stations easily. If you encounter any issues at a self-service station, look for an intercom button on the pump to call for assistance; there is usually a staff member inside the office even at self-service locations. By understanding the fuel types, knowing how to operate the self-service terminals, and remembering the full tank return policy, you can enjoy your Japanese road trip with complete peace of mind.

Why Japan's Expressways Are Worth Knowing Before You Drive

Renting a car in Japan opens up scenic routes and hidden destinations that public transport cannot reach. However, Japan's expressway network comes with rules and systems that differ from what drivers in other countries may expect. Understanding these before you hit the highway will save you time, money, and stress.

The ETC Card: Your Key to Smooth Toll Payments

Japan's expressways are toll roads, and the Electronic Toll Collection (ETC) system is the most efficient way to pay. When you rent a car, the vehicle will almost certainly have an ETC device installed in the dashboard. What you need to add is an ETC card, available as an optional rental item at most car rental counters. Request one when you book your vehicle.

Using the ETC system is straightforward. Insert the card into the in-car reader before driving, and the device will give an audible confirmation. When approaching a toll gate, look for the purple-coloured ETC lane rather than the green general lane. Slow down to 20 km/h or below as you pass through — the barrier lifts automatically if your card is valid. All toll charges are settled when you return the rental car.

The ETC card also unlocks time-based discounts. Driving between midnight and 4 a.m. qualifies for roughly 30% off on many expressways. Weekend and public holiday discounts are also available. For longer road trips, some rental companies offer regional Expressway Passes — such as the Hokkaido Expressway Pass or the Kyushu Expressway Pass — allowing unlimited expressway use within a specific region for a flat fee.

Speed Limits on Japanese Expressways

The standard speed limit on Japan's national expressways is 100 km/h for ordinary passenger cars, with a minimum of 50 km/h on the main lanes. However, not all high-speed roads share the same limit. Urban motorways such as the Tokyo Metropolitan Expressway are legally classified differently, and the default speed limit on these roads is 60 km/h unless a digital sign indicates otherwise. Many foreign drivers receive fines on the Tokyo Metropolitan Expressway by assuming the limit is 100 km/h. Always check posted signs.

Keep to the left lane for regular driving. The rightmost lane is a passing lane only — staying in it after overtaking is a traffic violation. Driving on the road shoulder is strictly prohibited except in genuine emergencies.

Service Areas and Parking Areas

Japan's expressways are well supplied with rest facilities. Service Areas (SA) are larger stops offering restaurants, convenience stores, gift shops, petrol stations, and clean restrooms open 24 hours. Parking Areas (PA) are smaller and may offer only restrooms and vending machines.

• Follow the green directional signs with a "P", coffee cup, or "i" symbol to find the next rest stop.
• Park in the correct bay for your vehicle type — trucks, buses, and motorcycles have designated areas.
• Refuel at SA petrol stations before long stretches with no service facilities. Running out of fuel on an expressway is a punishable offence in Japan.

What to Do If Your Car Breaks Down

If your car breaks down, move the vehicle to the road shoulder or an emergency bay if possible and turn on your hazard lights immediately. Place an emergency warning triangle at least 50 metres behind the vehicle — this is legally required on expressways. Do not remain inside the car. Exit through the left-side door and wait behind the guardrail, away from traffic. Emergency telephones are installed every kilometre along the expressway. You can also dial #9910 from your mobile phone.

Key Rules to Remember

• No U-turns or reversing on expressways. If you miss your exit, proceed to the next interchange and ask toll staff — they can arrange a legal U-turn route at no charge.
• Seatbelts are mandatory for all occupants at all times.
• Mobile phone use while driving is illegal and carries heavy fines.
• Vehicles with engine displacement of 125cc or below are not permitted on expressways.

Japan's expressways are among the safest in Asia. With the right preparation — particularly around the ETC card and speed rules — your highway driving experience will be smooth and genuinely enjoyable.