Because of convenience of commodity distribution to Osaka, the economic center, river ports for the water transportation of the Kako-gawa River, such as Hongo and Saji, developed there, providing goods transportation functions in a broad area beyond the county.
経済の中心地である大坂への物流の利便性の高さから、本郷や佐治など、加古川水運の船着場が発達し、郡の範囲を超える広い範囲の物流を担っていた。