In Higashimikawa (eastern part of Mikawa Province), the Toda clan, the Saigo clan and others seceded from the Imagawa clan as well following Motoyasu's move, and became affiliated with the Matsudaira clan.
この動きに追従するように東三河でも戸田氏や西郷氏などが離反、松平氏の傘下へ転属していく。