The objective of this study is to evaluate the effects of macroeconomic policy variables on bilateral trade between the United States and Japan. An auto-regressive distributed lag model is developed to estimate the effects of government economic policies on four commodity groups: agriculture; materials and chemicals; machinery and transport equipment; and manufactured goods. Results indicate that monetary policy significantly affects U. S. and Japanese imports of manufactured goods and transport equipment. The results also show that changes in government expenditure have a significant long-run effect on U.S. imports of manufactured goods and Japanese imports of materials and chemicals, while the long-run effects of income and exchange rates are significant for most commodity groups.