This paper reports how the floor plan of historical townhouses in Hita Mameda-machi (Hita-shi, Oita) have been remodeled. At the time of their construction, it was typical that the tooridoma was planned and the rooms were arranged at one side of this. However, the many of them have been remodeled into the floor plan with large doma area which faced the street. As a result of considering the relation between use and floor plan of the townhouses, it became clear that they were often remodeled into such floor plan in case they were used as shops.
