This paper describes the methodology of data collection for pedestrian mobility in downtown areas whose revitalization is one of the primary policy objectives in Japan. Five data collection methods are proposed and compared from viewpoints of data reliability and cost-effectiveness. The method which turned out to be most reliable and effective is the questionnaire survey using a downtown map, which is handed to a pedestrian respondent at mode-change points including railway stations. The respondent marks his/her walking routes and destinations on the map and returns it by mail. The data collected under this method including pedestrian trip chains proved to be effectively available to revitalization planning.