Many zaichokanjin who became kokujin were incorporated into the bureaucracy of shugo, kokuga regions managed by zaichokanjin were reorganized into the shugo regions governed by shugo and led to the establishment of shugo ryokoku sei (governmental system by shugo).
国人となった在庁官人は、その多くが守護の被官に組み込まれ、在庁官人の管理していた国衙領は守護の支配する守護領へ再編成されていき、守護領国制の確立へとつながっていった。