京都所司代
In 1741 Tadamochi was appointed a "sōshaban" and "jisha-bugyō" simultaneously, and later the same year, he became "Osaka jōdai". In 1747 his courtesy title was changed to "Sanuki-no-kami" and his court rank was increased from Lower 5th, Junior grade to Lower 4th, Junior grade. From 1752-1756 he was appointed the 21st "Kyoto Shoshidai", and he added the title of "Jijū" to his honorifics.