This study explores the process by which the spatial structure of riverbanks in the study area were reorganized and new modern urban functions from the Bakumatsu period (approximately 18531868) to the Meiji era (18681912) were developed by investigating the formation and transformation of "Iida-kashi" (common riverside spaces). Our analysis first reconstructs the land plots at the time that the kashi were created and examines their spatial structures from tenant records. Then, trends prior to the kashi formation to understand their eventual transformation were investigated. As a result, we found that Iida-kashi is characterized by the location of the renters and their utilization of riverbanks. For example, some renters in Iida-kashi were located on the opposite side of the Kanda River. These observations suggest that property on their land plots is changeable. Moreover, tenants located on Iida-kashi state that their utilization is confined in the riverbanks.