The Fukozu Matsudaira family around the time that Ietada celebrated his coming of age had yielded allegiance to the main house, that of Ieyasu TOKUGAWA, and were under the direction of Tadatsugu SAKAI, who had been charged with governing Higashimikawa (Yoshida-jo Castle, Mikawa Province) by Ieyasu.
家忠が元服したころの深溝松平家は、本家である徳川家康に服属し、家康に東三河の支配を任されていた酒井忠次（吉田城(三河国)代）の指揮下にあった。