徳川家宣
was the 2nd Manabe "daimyō" of Murakami Domain and the 1st "daimyō" of Sabae Domain and 2nd hereditary chieftain of the Manabe clan. His courtesy title was "Shimōsa-no-kami", and his Court rank was Junior Fifth Rank, Lower Grade. He was adopted by his elder brother Manabe Akifusa as heir in 1708, and was received in formal audience by Shōgun Tokugawa Tsunayoshi the same year. In 1720, became "daimyō" on his brother's death. The same year, he was transferred from Murakami to the newly created domain of Sabae by ShōgunTokugawa Yoshimune as part of the purge of the Manabe clan due to then influence it had over his predecessors Tokugawa Ienobu and Tokugawa Ietsugu. Although Sabae had nominally the same "kokudaka" as Murakami, it lacked then prestige of being a "castle-holding domain" and was surrounded by the powerful Fukui Domain and "tenryō" territories, so in effect the transfer was a demotion. The domain also lacked a "jōkamachi", or even a "jin'ya" from which the domain could be managed. Akitoki died in the clan's residence in Mita, Edo while attempting to sort out the transfer at the age of 35 without having ever set foot in Sabae.