The purpose of this study is to clarify the formative period and the process of Osaka Castle town, through the analysis of the "Mizucho Ezu" (land register map) in the Edo era. This article concentrates on the Simanouchi area. The Nagahori Canal was divided the Simanouchi area from the Senba area. The north Simanouchi area was likened to the Senba, on the town planning and subdivision. Before the excavation of the Nagahori Canal, the Unagidani and the Kunosuke-cho street were the limits of the old,Senba area.
