Regional Responses to U.S.-China Competition in the Indo-Pacific

America's enduring alliance with Japan not only is the cornerstone of U.S. force posture in the Indo-Pacific region, but also magnifies and bolsters U.S. influence across that vast swath of territory. In this report, the author assesses the prospects for deepening U.S.-Japan alliance cooperation and coordination in Southeast Asia through 2030 to compete with China.