"The post-World War II U.S.-Japan alliance has long been an anchor of the U.S. security role in East Asia. The alliance facilitates the forward deployment of about 36,000 U.S. troops and other U.S. military assets in the Asia-Pacific, thereby undergirding U.S. national security strategy in the region. For Japan, the alliance and the U.S. nuclear umbrella provide maneuvering room in dealing with its neighbors, particularly China and North Korea. […] However, the economic problems in Japan and the United States associated with the credit crisis and the related economic recession, together with the impact of the March 11 disasters, will likely dominate the bilateral economic agenda for the foreseeable future. Japan has been hit particularly hard by the financial crisis and the subsequent economic downturn. Japan's gross domestic product (GDP) declined 1.2% in 2008 and 5.3% in 2009 but grew 4.0% in 2010. It is expected to increase only 1.0% in 2011 as a result of the March 11 earthquake, tsunami, and nuclear accident. The value of the yen has appreciated and has hit 15-year highs in terms of the U.S. dollar, which could adversely affect Japanese exports to the United States and other countries, contributing to the downturn in Japanese economic growth."
CRS Report for Congress, RL33436