Later, TAIRA no Kiyomori from the military nobles established the Taira clan administration, and as a result of the civil war of Gisho-Juei (the Genpei war) which occurred during the course of overthrowing the Taira clan administration, a military administration (the Kamakura bakufu (Japanese feudal government headed by a shogun)) was established in the East, but the nobles continued to seize political power afterwards as well.
その後、軍事貴族の平清盛が平氏政権をうちたて、平氏政権打倒の過程で発生したの内乱（源平合戦）の結果、東国に武家政権（鎌倉幕府）が登場することとなったが、その後も貴族たちは一定の政治実権を握り続けたのである。