At the time of Yorito's son, FUJIWARA no Tsunekiyo (Gon no daibu [a provisional master] of the Watari region), the clan managed a shoen (a manor in medieval Japan) in the Watari region, which is the implication of the expansion of the clan's power.
頼遠の子・藤原経清（亘理権大夫）に至り、亘理地方に荘園を経営するなど勢力の伸張が見られた。