Travelers head to Japan for mountain passes and coastal routes outside the major cities, and it's a solid pick for exploring beyond the rail network. Here's what's genuinely useful to know before you get on the road.
Many Japanese expressways are toll roads billed via an ETC card rented with the car; without one, you'll need cash at manual toll booths.
Beyond that, the basics apply everywhere: rental staff and local authorities in Japan typically want to see your passport, your domestic license, and your international driving permit together. Keeping all three ready at pickup saves time.
Japan traffic keeps to the left. If you're used to right-hand traffic, it's worth reading a left-hand driving guide before you pick up a rental.
Many rental agencies and authorities in Japan recognize an international driving permit alongside a valid domestic license, though requirements can change. Confirm current rules for your specific trip before you travel.