This volume is part of a subseries of the Foreign Relations of the United States that documents the most issues in the foreign policy of the 5 years (1964-1968) of the administration of Lyndon B. Johnson. This volume documents U.S. policy toward Japan during a period of increasing change in the relations between the two allies. Japan was fast becoming a major economic power while still relying on the United States for its security. A theme of the coverage, in fact, is the ongoing U.S. effort to encourage Japan to assume a greater role in its own military defense and to play a greater role on the world stage, especially in terms of economic development of the rest of Asia. Another major theme is U.S. efforts to encourage the continuation of a moderate, pro-Western Japanese Government.