How to rent a car in Japan

Herz

Nippon Rent-a-car

There is no AVIS in Japan.
Nippon Rent-a-car is biggest rent a car company, I think.
You will be able to find Nippon Rent-a-car in Big cities.

When you arrive Narita Airport, you have to go to ground floor if you want to rent a car.
You can find Nippon Rent-a-car(English Page), Toyota Rentacar(Japanese Only), Nissan Rentacar(Japanese Only) and Orix Rent-a-car(Japanese Only).

The public transportation facility is recommended to be used when not accustoming because Japan is "Keep to the right". :-D