Electronic toll collection or ETC is convenient to have when you're driving around Japan because of its many highway toll gates. It makes it easy to pay tolls without having to stop the car. You'll connect it to a payment method such as a credit card and it will collect all of the tolls from your trip. Many Okinawa Naha Airport car rentals come equipped with ETC. ﻿Be sure to ask your agent about this when making your reservation. Search rental cars on KAYAK