However, the latter view mentioned above originated with a historical document written by a person who was a direct descendent of Nobukatsu, and Nobutaka's mother was from the Saka family, a branch of the Kabuto family, which was a branch of the Seki family (the Seki family originating from the Taira family), the most powerful ruling family in Ise Province.
ただし、身分説は信雄家系により後年書かれた史料に見られるもので、信孝生母坂氏は伊勢国随一の豪族関氏平姓関氏の庶流鹿伏兎氏の庶流にあたる。