A key defense initiative aimed at strengthening the coordination between U.S. forces and Japan’s Self-Defense Forces (SDF) is now in question following Donald Trump’s return to the U.S. presidency. The plan, which was spearheaded under the Biden administration, centers on reorganizing the command structure of U.S. forces stationed in Japan to align with Japan’s launch of its new Joint Operations Command.
Until now, the SDF’s chief of the Joint Staff Office had been coordinating with two U.S. counterparts: the chairman of the Joint Chiefs of Staff and the commander of the Indo-Pacific Command. Under the proposed reform, the commander of Japan’s new Joint Operations Command would directly correspond with the U.S. Indo-Pacific commander, centralizing operational communication and eliminating redundancies in the chain of command.
However, with the Indo-Pacific Command headquartered in Hawaii, the time difference has created operational challenges. To overcome this, both countries had agreed to transform the current U.S. command office at Yokota Air Base in Tokyo into a fully functioning joint force headquarters. Such a move would enable U.S. forces in Japan to directly coordinate with their Japanese counterparts in both peacetime and crisis scenarios — a shift seen as crucial for improving real-time responsiveness and deterring regional threats, particularly from China.
At a joint security dialogue in July last year, Japan and the United States finalized this restructuring plan. But now, reports from U.S. media suggest the Defense Department under the Trump administration is reviewing whether to proceed, raising concerns that the plan may be delayed or abandoned altogether.
Japanese Defense Minister Gen Nakatani sought to reassure the public, stating on Friday, “I believe the United States has not changed its policy.” He is expected to meet with U.S. Defense Secretary Pete Hegseth later this month in Tokyo to discuss the status of the reorganization.
Ryoichi Oriki, a former chief of the SDF Joint Staff, emphasized the strategic importance of moving forward. “If Japan and the United States show they are coordinated in their actions, it will help deter China,” he said. “Japan and the United States should work quickly to coordinate on improving the structure of U.S. forces.”
As Tokyo awaits clarity from Washington, the future of the joint headquarters — and broader regional security cooperation — hangs in the balance.
