"Japan normally produces a slight surplus of rice but imports large quantities of wheat, sorghum, and soybeans, primarily from the United States. Japan is the largest market for U.S. agricultural exports."
"Deposits of gold, magnesium, and silver meet current industrial demands, but Japan is dependent on foreign sources for many of the minerals essential to modern industry. Iron ore, coke, copper, and bauxite must be imported, as must many forest products."
"Japan is a major market for many U.S. manufactured goods, including chemicals, pharmaceuticals, photo supplies, commercial aircraft, nonferrous metals, plastics, and medical and scientific supplies. Japan also is the largest foreign market for U.S. agricultural products, with total agricultural exports valued at $9.5 billion, excluding forestry products."
"U.S. foreign direct investment in Japan reached $78 billion in 2004, up from $73 billion in 2003. New U.S. investment was especially significant in financial services, Internet services, and software, generating new export opportunities for U.S. firms and employment for U.S. workers."
http://www.state.gov/r/pa/ei/bgn/4142.htm