Formation Process and Feature of Aoishi Ishigaki on Sakogawa in Tokushima

Abstract

Development has advanced in Sakogawa under the Tokushima castle along with the formation of the castle town. Sako was a place where stone for the Tokushima castle stones was quarried, and Sakogawa was used for transportation of local stone, too. Ishigaki was built on the both riverside, and this landscape is different form both side. About the Ishigaki of the Awa Aoishi continuously formed with the formation process of Sakogawa. This discourse is current consideration to the landscape preservation in the future. In conclusion, three ages exist in Sakogawa. They are ages of “Natural water road”, “Transportation for merchant” and “Drainage”. A lot of Ishigaki where it cost the left bank side were seen and it relates to the land use of the upper part.