To confront the Oda clan, Hirotada MATSUDAIRA became a vassal of the Imagawa clan in Suruga when he was six years old, and it was decided that Takechiyo should be sent to Sunpu in Suruga Province to be placed in the custody of the Imagawa clan as a hostage.
6歳の時、松平広忠は織田氏に対抗するため、駿河国の今川氏に臣従し、竹千代は今川氏の人質として駿河国・駿府へ送られることとなった。