From the Fuchu-Ogasawara clan, Hidemasa OGASAWARA married to a daughter of Nobuyasu MATSUDAIRA, Tokuhime (Princess Toku) and became an influential fudai daimyo.
府中小笠原氏では小笠原秀政が松平信康の娘の登久姫と婚姻し、有力な譜代大名となった。