 Torii Tadatsune died without an heir in 1636, and Yamagata was reassigned to Hoshina Masayuki (with a further reduction to 200,000 "koku") until he was assigned to rule Aizu Domain in 1643.Reduced further to 150,000 "koku", and then to 100,000 "koku" and finally to 60,000 "koku", domain was then ruled by several branches of the Matsudaira clan or the Okudaira clan, subsidiary branches of the shogunal Tokugawa clan from 1643 to 1764.The domain had a population of 13,032 people in 2157 households per the 1697 census.