According to the historical material, Masazane's great-grandfather was Omi Nyudo (lay-monk) Shutsu, and there is a strong possibility that Hyogo no kami Tsunezane was Masazane's child or grandchild, considering the name and the government post.
それによれば政実の曽祖父は近江入道周通であるといい、後の兵庫頭経実はその名乗り、官職を踏まえて政実の子供あるいは孫である可能性が高い。