In the Sengoku period (period of Warring States), the head family of Ogasawara clan was taken its territory and ruined by the Takeda clan, but in the Azuchi-Momoyama period it was restored and in the Edo period it became a fudai daimyo (a daimyo in hereditary vassal to the Tokugawa family).
戦国時代(日本)には小笠原氏の宗家は武田氏に所領を奪われて没落するが、安土桃山時代に再興し、江戸時代には譜代大名となった。