According to MURAOKA, Kazumasa also should have been aware that Motoyasu, having been assassinated, had been replaced by Motonobu SERATA, and so he would have known that Nobuyasu took over the MATSUDAIRA (TOKUGAWA) clan.'
「私の説に従うなら、数正も元康が暗殺されたとき、世良田元信が挿げ変わることは承認していたはずであるが、数正は信康が成長すれば、松平（徳川）氏の家督は信康が継ぐものと信じていたはずである。」