This changed from the Muromachi period following the appropriation of police powers by shugo where during the Kamakura period where a shift took place whereby local provincial lords became affiliated with daimyo as shugo daimyo.
転じて、室町時代以降、諸国の警察権を掌握していた守護が、鎌倉時代の地頭を出自とする国人を傘下に収め大名化し守護大名として成立した。