This study aims to find the relationship between urban layout and automobile usage patterns in Japan, especially focusing on gasoline consumption. The trip data was collected for 97 typical cities from the Nationwide Person-trip Surveys that were conducted in 1987 and 1992. Individual trip data are revised for accurate calculation. The relationship between car usage and factors such as urban density was calibrated by the model. It was found that the urban density is not only one of important factors that influence car usage in each city. Factors such as number of railway stations, area dummies and development history are indispensable factors to explain the level or car usage.