Tsugaru clan
Tsugaru Tsugumichi was the son of Tsugaru Yukitomo, from a branch line of the Tsugaru clan, and was adopted by the 3rd "daimyō" of Kuroishi, Tsugaru Tsuguyasu, as official heir due to the lack of a male descendant on Tsuguyasu’s death in 1851. He changed his name at the time from Tsugaru Tomozumi to Tsugaru Tsugumichi.