Yoriyasu adopted Ujitomo from the Horikoshi clan (a direct line of the Totomi-Imagawa clan, a family of the Imagawa clan), for the purpose of passing the family estate to him.
頼康は堀越氏（今川氏の一族・遠江今川氏の直系）から氏朝を迎えて養子とし家督を譲る。