In Tusima Island, houses have traditionally been built by the villagers' cooperative works, using timber grown in their communal forest. Recently because of the depopulation and the change of the occupation, this kind of traditional cooperative management of village lives, that can be evaluated as the harmonious ways to the environmental and historical context of this district, have become diminished, this is a study to clear the system of building "Hrabasira-dukuri" houses, and to consider how to be the local housing and town-planning. As a result, we cleared that the existences of private forest, the knowledge on housing of clients, "Kasei" of village community, traditional artist, enable the system of the self management of housing, and that the depopulation, the variation of employment, and the incoming of other timbers market happens the housing system from directly management to contact construction.
