Typically an add-on feature to a variety of car models and makes, car navigation, more popularly known as GPS Global Positioning Systemscollects position data and syncs it with existing road maps. When you are purchasing a used vehicle gps navigations with asian language Japan, for instance, the information on the navigation system is usually displayed using the Japanese language. If it operates on a DVD system, you just need to call the car company and buy an English language disc. The upfront cost is usually around USD. All Japanese models and makes gps navigations with asian language designed with unique built-in features. While converting the navigation system is as easy as counting 1 to 3, there are models that do not allow language conversion for other features.