The records in this collection relate to political relations between China and Japan for the period 1930 -1939. The records are mostly instructions to and despatches from diplomatic and consular officials; the despatches are often accompanied by enclosures. Also included in these records are notes between the Department of State and foreign diplomatic representatives in the United States, memorandums prepared by officials of the Department. There are records on: the Japanese occupation of Manchuria, beginning with the Mukden incident, in 1931; military action at Shanghai in 1932; further Japanese political and economic penetration into China, 1935-1936; and the course of the undeclared war between Japan and China, 1937-1939.