Nanbu Toshimasa
Toshikatsu was the sixth son of Nanbu Toshimi, the 7th "daimyō" of Morioka Domain, but was initially adopted by a 3000 "koku" "hatamoto" branch of the clan founded by a son of Nanbu Toshimoto, he was adopted as heir and was received in formal audience by "shōgun" Tokugawa Ieharu on 4 April 1770, and became head of his adopted family on 22 August 1773. However, as the eldest (and only) son of the 8th "daimyō", Nanbu Toshikatsu had been dispossessed he was recalled on 16 December 1774 to become Toshikatsu’s adopted heir, at which time the "hatamoto  branch was abolished. On 22 December 1774 he was again received in audience by Tokugawa Ieharu, and he received the formal courtesy title of Shuri-no-taifu" and Junior 5th court rank. He became "daimyō" on the death of his adopted father on 22 April 1781 and advanced to the courtesy title of "Daizen-no-taifu". However, he died three years later on 5 May 1784 at the age of 34, having made little impact on the domain during his tenure, and leaving an infant son as his heir.