The Tamura clan was a leading Daigozoku (large local ruling family) in Oshu (northern Honshu); one of its members became the lawful wife of Masamune DATE, and the clan continued to flourish as a famous Daimyo family (feudal lord family) during the Edo period.
奥州屈指の大豪族で、伊達政宗の正室を出し、江戸時代も名望大名家として続いた。