Commodore Matthew Perry forced the doors of Japan open in 1853, using his kurofune, the black ships, to force Japan to open itself to trade. He would later return in 1854 and established the Japan-US Treaty of Peace and Amity at the Convention of Kanagawa. Perry used heavy handed tactics to force the young and sickly Tokugawa Ieyoshi to sign and agree to this Treaty. What if part of the Japan-Us Treaty of Peace and Amity had made Japan a territory of the United States, and eventually became a state itself? Its not outside of the realm of possibility. History saw something similar happen with Hawaii, where the US moved in and overthrew the monarchy, and then established it as a state. What would have been the reaction had the US overthrown the Emperor of Japan and taken it fully for its own?