Hamamatsu Domain
Inoue Masanao was the fourth son of the "daimyō" of Tatebayashi Domain, Inoue Masaharu, and was born before his father was transferred to Hamamatsu. He inherited the leadership of the Inoue clan and the position of "daimyō" of Hamamatsu Domain on his father’s death in 1847. In 1851, he was awarded Lower 5th Court Rank and the courtesy title of "Kawachi-no-kami".