During this period, Sengoku daimyo (the daimyo, that is Japanese territorial lord in the Sengoku period) who came from the Shugo daimyo, Shugodai (deputy of Shugo, provincial constable), or from Kokujin (local samurai) appeared, and the power of the Sengoku daimyo destroyed the medieval control system, raising their levels of independency, for example, by establishing bunkokuho (a law that individual sengoku-daimyo enforced within their own domains).
この時代は、守護大名や守護代、国人などを出自とする戦国大名が登場し、それら戦国大名勢力は中世的な支配体系を徐々に崩し、分国法を定めるなど各地で自立化を強めた。