Abstract
The purpose of this study is to clarify the characteristics of water uses of dwelling houses in urban districts and to collect the basic data for planning effective uses of water resources. Therefore, we executed the questionnaires of water uses and the investigation of consumptive volume of tap water for the dwelling houses in 11 urban districts from Hokkaido to Okinawa. From the results of these questionnaires, we described the characteristics of households and equipments of water uses, the frequencies and the ways of water uses for various purposes in living and the opinions for water uses. Using the Quantity theory cluster II , we clarified the main factors having an influence on the level of awareness for economy of water. Furthermore, we analysed the construction of water demands of households in urban districts. Using the Quantity theory cluster I , we clarified that the size of a family, regional differences, existence of a water closet and a well and exchanging frequencies of water in a bathtab etc. have a great influence on the consumptive volume of tap water per person of household.
