when did the us stop trading with japan
1939 1940
title: Trade policy of Japan text: of the Allied Powers. Initially, the United States' main goal for post-war Japan was to demilitarize the Japanese economy. During the early phase of post-war Japan, private foreign trade had been prohibited by SCAP, and all trade was state conducted. There were restrictions to heavy industry outputs such as steel, aluminium, and copper; which limited Japan's shipbuilding, machinery, and chemical industries. Imports were only allowed when they were judged to be indispensable to the sustenance of the Japanese economy. However, the SCAP policies to Japanese industry would be quickly reversed due to Cold War politics. On August 15, 1947, the title: Japan–United States relations text: new treaty provided for a ten-year term, after which it could be revoked upon one year's notice by either party. The treaty included general provisions on the further development of international cooperation and on improved future economic cooperation. Both countries worked closely to fulfill the United States promise, under Article 3 of the peace treaty, to return all Japanese territories acquired by the United States in war. In June 1968, the United States returned the Bonin Islands (including Iwo Jima) to Japanese administration control. In 1969, the Okinawa reversion issue and Japan's security ties with the United States became the title: Japan–United States relations text: that the island nation had been occupied by a foreign power. The San Francisco Peace Treaty, signed on September 8, 1951, marked the end of the Allied occupation, and when it went into effect on April 28, 1952, Japan was once again an independent state, and an ally of the United States. In the years after World War II, Japan's relations with the United States were placed on an equal footing for the first time at the end of the occupation by the Allied forces in April 1952. This equality, the legal basis of which was laid down in the title: Japan–United States relations text: was working closely with the British and the Dutch governments. When Japan seized Indochina (now Vietnam) in 1940–41, the United States, along with Australia, Britain and the Dutch government in exile, boycotted Japan via a trade embargo. They cut off 90% of Japan's oil supply, and Japan had to either withdraw from China or go to war with the US and Britain as well as China to get the oil. Under the Washington Naval treaty of 1922 and the London Naval treaty, the American navy was to be equal to the Japanese army by a ratio of 10:6. However, as title: Foreign relations of Japan text: Foreign relations of Japan The are handled by the Ministry of Foreign Affairs of Japan. Japanese foreign relations had to begin anew in 1945 and, when it was defeated in war and stripped of all of its foreign conquests and possessions. See History of Japanese foreign relations. The United States, acting for the Allied powers, occupied Japan 1945-51. Since gaining full independence with the Treaty of San Francisco, Japanese diplomatic policy has been based on close partnership with the United States and the emphasis on the international cooperation such as the United Nations. In the Cold War, Japan took a