In the short term, the United States was satisfied with the agreement, as Perry had achieved its primary goal of breaking Japan`s sakoku policy and creating the reasons for the protection of American citizens and a possible trade agreement. On the other hand, the Japanese were forced into this trade and many saw it as a sign of weakness. The Tokugawa Shogunate could indicate that the treaty had not been signed by the Shogun, or even by one of its troops, and that it had, at least temporarily, ruled out the possibility of an immediate military confrontation.  “The Americans came to Japan and sought access to ports and friendship. They got what they wanted through Kanagawa`s contract. The Japanese were reluctant and, in a way, dragged to the contract table. Subsequently, the contract proved very profitable for Japan. The Treaty of Kanagawa was the main culprit in Japan`s rapid transformation from an isolated and feudal empire to one of the most powerful and prosperous nations in the world. Perry returned on February 11, 1854 with an even greater force of eight warships and made it clear that he would not leave until a contract was signed. Perry continued his manipulation of the configuration by keeping away from lower officials, insinuating the use of force, measuring the port and refusing to meet in the negotiating venues provided for that purpose.
Negotiations began on March 8 and continued for about a month. Each game shared a performance when Perry arrived. The Americans had a technology demonstration, and the Japanese had a sumo wrestling show.  While the Japanese people were passionate about the new technology, Perry was not impressed by the sumo wrestlers and found this performance senseless and degrading: “This abominable exhibition only ended when the twenty-five successive two-man displayed their immense strengths and wild qualities.”  The Japanese side yielded to almost all of Perry`s demands, with the exception of a trade agreement modelled on previous U.S. treaties with China, which Perry later sought to postpone. The main controversy has focused on the choice of ports to open, perry Nagasaki being firmly opposed.