Based on the craftsmen like the Hata clan, domestic production of paper was promoted and Yamashiro Province taking pride in advanced techniques for paper making, played the role as the technical center of Japanese paper, and accordingly, with the increase of paper demand the supply of materials such as hemp and kozo came to depend on the provinces.
秦氏のような、技術者の基盤の上に製紙の国産化が行われ、山城国が製紙の先進技術を誇り、和紙の技術センターの役割を担ったが、紙の需要が高まるにつれ、原料の麻や楮（こうぞ）は地方に頼らざるを得なくなった。