Abstract: Think tanks in capitalist countries often have a significant strategic guiding role in domestic and foreign affairs due to their authority and theoretical contributions. The “Mt. Fuji Dialogue” characterized by the “Track 1.5” system, provides a platform for communication between the United States and Japan through annual meetings and exchange visits. The “Revolving Door Politics” plays a role here, making the “Mt. Fuji Dialogue” an important channel for the Japanese government to convey its stance to the United States. Additionally, the think tank reports published by the “Mt. Fuji Dialogue”, modeled after the “Armitage-Nye Report”, have garnered attention and research from both Japan and the United States. The “Mt. Fuji Dialogue” have significantly influenced on the adjustment of the U.S.-Japan alliance relationship, and there are three main reasons for its impact: firstly, the strong background of the Japan Institute of International Affairs and the Japan Center for Economic Research, which organize the “Mt. Fuji Dialogue”, attracts key politicians and scholars from both the United States and Japan. Secondly, the think tank reports cleverly address issues faced by both countries and provide suggestions that both the U.S. and Japan can largely agree on. These suggestions are highly beneficial for addressing crises in the U.S.-Japan cooperation. Lastly, the “Mt. Fuji Dialogue” ultimately serves the fundamental interests of the U.S.-Japan alliance. The discussions and exchanges under its agenda are closely related to the common interests of the U.S.-Japan alliance.

Key words: the U.S.-Japan alliance, think tank, international relationship in Northeast Asia, the “Mt.Fuji Dialogue”