常陸國
This clan's origin is a descendant of Hatta clan in Hitachi Province. Hatta clan are descended directly from Lord Fujiwara no Kamatari (614-669) by his grandson Hatta Tomoie (Fujiwara-shi), Takaoka Yasushige, grandson of Hatta Tomoie. There are a lot of descendants of him about Tokyo, Chiba and Kanagawa now.