Group 1 - The core strategy of the U.S. tariff policy is to use high tariffs as leverage against specific countries, effectively pressuring them into concessions without incurring actual costs [1][2] - The U.S. has threatened to raise tariffs on all steel and aluminum products to 50%, causing significant concern in Japan, a key ally that heavily relies on U.S. security [1][2] - Japan's trade representative, Akizawa Ryo, expressed strong dissatisfaction with the U.S. decision and urged a reconsideration, indicating a shift in Japan's stance during upcoming negotiations [2][6] Group 2 - The U.S. has previously imposed a 25% tariff on steel and aluminum from Japan, which faced intense opposition, and the new 50% tariff threat is seen as a tactic to gain leverage in negotiations [2][6] - The U.S. is using tariffs not only as economic tools but also as strategic instruments to compel allies to support its positions in international matters, particularly regarding China [2][4] - Discussions between U.S. President and Japanese Prime Minister Shigeru Ishiba included collaboration on the "Iron Dome" missile defense system, which is part of a broader strategy to secure financial contributions from Japan [4][6] Group 3 - The "Iron Dome" system is a significant project for U.S. national security, with an estimated investment of at least $175 billion, and Japan is considering contributing to its development [4][6] - Japan's potential financial support for the U.S. missile defense system may be aimed at securing concessions on tariffs, reflecting a complex interplay of economic and security interests [4][6] - The outcome of the tariff negotiations will likely depend on the extent of Japan's contributions to U.S. defense initiatives, indicating a transactional nature of the U.S.-Japan relationship [6]