Background
Inoue Masasada was the second son of the previous daimyō of Hamamatsu Domain, Inoue Masatsune.
井上正定
Inoue Masasada was the second son of the previous daimyō of Hamamatsu Domain, Inoue Masatsune.
He became 7th head of the Mikawa-branch of Inoue clan and daimyō of Hamamatsu Domain on his father’s death in 1766. In 1769, he was awarded Lower 5th Court Rank and the courtesy title of Kawachi-no-kami. In 1774, Masasada entered the administration of the Tokugawa shogunate as a Sōshaban (Master of Ceremonies), becoming Jisha-bugyō on May 11, 1781.
Inoue Masasada was married to a daughter of Matsudaira Norisuke, daimyō of Yamagata Domain, but had three other concubines.