The very first and most obvious thing you should look for when attempting to choose used Japanese cars to buy is its ability to still function. If the car runs, then the first hurdle is overcome. But then you have to check whether it still runs well, or whether it will run for awhile then die on you halfway down the block. To check about the functionality of your Japanese used cars, you either have to have an engineering or automotive background, or find a friend or acquaintance that does. Barring those possibilities, you may have to hire someone who is really knowledgeable about the inner workings of any Japanese used car for sale that you are eyeing to buy.