This study aims to clarify the relations between the architectural space and the regionality described in Saikaku's works at Genroku period through the two methods. First, it is that we extract the words of architectural space and the characters from Saikaku's literacy works. Besides, we classify into architectural and contextual element. Second, it is that we plot on the map to grasp the point of the relation about the region. It is as follows. In the Genroku period, Japan was able to have a variety of regions characterized by architectural words and characters. At this ages, the social strata clearly exist among living people. And it had influence upon the architecural space as a spatial boundary such as the gate, door, and the sliding door. The regionaliry is full of colors. In Kansai area, every region is connected with each other. But, on the contrary, the Musashi area had been isolated from Kantoh area, in spite of their architectual prosperity.
