A group of rich farmers named the Tato (cultivators) made their appearance around the 9th and 10th centuries, and during the same period, koden (land directly controlled by the kokuga (provincial government office)) was reorganized into units of land known as myoden.
9世紀～10世紀ごろ、田堵と呼ばれる富豪農民が登場し、時を同じくして、国衙（国司の役所）が支配していた公田が、名田という単位に再編された。