The Hattori artificial stone method was mainly used for river and port structures, such as a dike of reclamation by drainage, a breakwater and a sluice, for Taisho Era from Meiji Era. The purpose of this study is showing clearly how the method was accepted and spread all over Japan, from the viewpoint of the relation of Yajiro Shinagawa which was the patron of Choshichi Hattori who invented it, and him. In this paper, clarifying it from a human and political viewpoint based on letters and documents, introducing the method used in the Chugoku region, and introduces about existing heritages.
