The aim of this study is to trace how housing for three-generation families has changed in the past half century and thereby to predict futures changes and obtain useful information for housing. In order to make a successive analysis of the part changes, 1300 examples of housing clans for three-generation families have been selected from magazines published since pre-wart imes an analyzed according to each period. The study has proven that the three-generation family characteristic of Japan will continue to exist and will continue to be the main type of family arrangements in Japan.
