refers to the final years of the Edo period when the Tokugawa shogunate ended. Between 1853 and 1867 Japan ended its isolationist foreign policy known as sakoku and changed from a feudal shogunate to the Meiji government. The major ideological-political divide during this period was between the pro-imperial nationalists called ishin shishi and the shogunate forces, which included the elite shinsengumi swordsmen.