The Karita clan operated from the Katta District, south of Mutsu Province (now Miyagi Prefecture). This clan founded the Shiroishi Castle in the Heian period."Monument"."history-land.com"."rekishi pdf, page 2" ."Shiroishi Castle". The Karita clan later became the Shiroishi clan, which served the Date clan"Shiroishi-shi" on Harimaya.com (28 March 2008). "Shiroishi-shi" on shiroishi.ne.jp .

References