The Aizu Domain was a feudal domain of the Tokugawa Shogunate ruled by the Matsudaira clan. They were founded by Yoshiaki Kato and the Kato in its early history, but the fief was later given to the Matsudaira.
History[]
Aizu was ruled by the Matsudaira clan. The Aizu-Matsudaira family owed its position, and even its family name, entirely to its long-standing links to the Tokugawa shoguns. By history and by inclination, Aizu was the principal domain of the Shogunate at the start of the Boshin War. A strong traditionalist streak made the Matsudaira sponsors of the shinsergumi, former ronin now loyal to the shogunate.