What if in an alternate scenerio, a European power, sends a large fleet and opens up Japan, under the Tokogawa Shogunate, around 1700s -1760s? Japan maintains independence, but makes unequal treaties with the Europeans (for now). What could be some possiblities? Would Japan try to Westernize, adapting Western Arms, Ships, Tactics, Culture? Would they kept the Shogunate?