In 1565, Yoshida-jo Castle (Mikawa Province), which was the base in Higashi (East) Mikawa, was fallen and Imagawa clan's forces were expelled from Mikawa.
永禄8年（1565年）には東三河の拠点である吉田城_(三河国)が失陥し、今川氏の勢力は三河から駆逐される。