Tokugawa Ieshige
was also the 1st Sakakibara "daimyō" of Takada and the 10th hereditary chieftain of the Sakakibara clan. Masanaga was the second son of Masamine and younger brother of Masazumi by the same mother. Masazumi died in 1745 at age 10 before having been received in audience by the Shōgun, so then clan kept the death secret and renamed Masanaga to take his place. He was formally received by Shōgun Tokugawa Ieshige] in 1750. His tenure was uneventful and his received promotion to Junior 4th Court Rank in 1754 and the additional courtesy title of "Jijū" in 1784. In 1789 he retired in favour of his son, and his courtesy title was changed to "Ukyō-daifu". His wife was a daughter of Hotta Masasuke of Sakura Domain.