This wealthy class of peasants, who were called "tato" (cultivators), accumulated wealth by developing and integrating fields (Eiden), as well as performing suiko (government loans, often seed rice, made to peasants in Japan from the 7th through the 12th centuries), and gained control over the ordinary peasants by involving them in their business.
こうした富豪層は田堵と呼ばれ、開発・集積した田地の経営（営田）や出挙の実施などで富を蓄積し、一般の百姓を自らの経営下に組み込んでいった。