Shiroishi Castle (白石城 Shiroishi-jō) is a Japanese castle in Shiroishi, Miyagi, within what was Mutsu Province.[1] It was the castle of the Katakura clan, which was a family of retainers serving the Date clan of Sendai. It was also the headquarters of the Ōuetsu Reppan Dōmei in 1868.[2]