The purpose of this study is to establish the method of forecasting an increase in the number of toilet users by examining the influence on the toilet uses by the customers of the restaurants in the railway stations. At first, restaurant customer's toilet usage rate was shown from measurement survey of toilet uses and restaurant uses in the railway stations. Next, restaurant customer and toilet user's investigation results and the customer behavior investigation results in the restaurants were examined, and the influence that the duration of stay time of the restaurant exerted on the toilet use was shown.
