To address this, the stance was to firstly emphasize the historical fact that 'the Egawa clan are descended from the Matsudaira clan' and they were decendents following in the lineage of Kiyomasa MATSUDAIRA (as grandfather) who was once part of the Serata clan (same family lineage as the Egawa clan) and, that the Nitta clan were linked in the family tree.
祖父松平清康がかつて世良田氏（得川氏の同族）の末裔であると主張している故事に倣って、「松平氏は得川氏の末裔」説を唱えはじめ、系図を新田氏につなげたのである。