Abstract
The purpose of this study is to clarify the differences between detached houses for nuclear families and those for stem-families. This study uses data from the investigations of newly-constructed detached houses which were financed by the Goverment Housing Loan in 1987. The summary of the results is as follows; 1) There is a tendency for houses for stem-families to have greater floor area, more dwelling rooms, and more tatami rooms. 2) A greater number also have a tsuzuki-ma (2 or more tatami rooms which can easily be joined by opening sliding-ponel doors) and a Buddhist altar. 3) 15 % of aged persons have their own rooms with a private kitchen and/or toilet, the rest have only their own rooms that are ordinary tatami rooms.