sentences:  For instance the Sengoku period (1478–1603) saw Japan torn by civil war as daimyō warlords fought for control of land.In the Tokugawa period (1603–1868), peace from civil war meant there were no wars for the samurai to fight and some samurai became ronin, masterless warriors left to struggle to survive.In the Meiji period (1868–1912), we see a decline of the hereditary existence of the samurai and the rise of westernization.