On the other hand, even in the samurai class that had been fluid for a long period of time, the family status of each samurai family became fixed corresponding to the stabilization of the society, and the shogun family and daimyo class families, which had inherited their upper samurai class positions, came to form the so-called Buke-kizoku (samurai Kizoku).
一方、長らく流動的であった武士階級においても、社会の安定化に伴って、武士各家の家格が固定されていき、上流武士階級を世襲していった将軍家や大名層は、いわゆる武家貴族を形成するに至った。