This movie are talking about when Japan is in Meiji Restoration, The formation in 1866 of the Satsuma-Chōshū Alliance between Saigō Takamori, the leader of the Satsuma domain, and Kido Takayoshi, the leader of the Chōshū domain, built the foundation of the Meiji restoration. These two leaders supported the Emperor Kōmei (Emperor Meiji's father) and were brought together by Sakamoto Ryoma for the purpose of challenging the ruling Tokugawa Shogunate (bakufu) and restoring the emperor to power. On February 3,1867, Emperor Meiji ascended the throne after Emperor Kōmei's death on January 30, 1867. This period also saw Japan change from being a feudal society to having a capitalist economy and left the Japanese with a lingering Western influence.
After this movie I feel Japanese are so brave, they can suicide when the enemy control the war. And I think Nathan Algren are very cool either, he abandon the techonogy weapon, to help Bushido to fight the war, althoght at the end they all die, but I still think he is very cool.