Group 1 - Japan has unexpectedly taken a strong stance against the U.S. during the trade war, indicating a shift from being a passive player to an active strategist [1][6][28] - The U.S. has historically focused on Russia as a primary strategic concern, but Japan's military developments have gone unnoticed [3][6][28] - Japan's maritime capabilities have rapidly increased, particularly through the construction of seven quasi-aircraft carriers, which are significantly more capable than traditional destroyers [8][10][30] Group 2 - Japan's "Maritime Self-Defense Force Reconstruction Plan" aims to enhance naval power in East Asia, with a focus on building advanced naval vessels [8][10] - The construction of these quasi-aircraft carriers has been remarkably efficient, with Japan producing them at a rate of one every four months, forming three complete carrier battle groups [10][13] - Japan's stealth destroyers have also advanced, with 11 vessels launched in four years, showcasing cutting-edge technology and compatibility with U.S. military systems [11][15][13] Group 3 - Japan employs a clever disguise strategy in its military expansion, labeling its quasi-aircraft carriers as "helicopter destroyers" to mask their true capabilities [17][19] - The gradual enhancement of these vessels allows Japan to increase its military capabilities without drawing significant attention [19][24] - Japan's military ambitions have evolved from a defensive posture to a more offensive capability, facilitated by U.S. support and a shift in strategic focus [24][28] Group 4 - The U.S. initially supported Japan's military developments, viewing them as a means to bolster its own strategic interests in the Asia-Pacific region [26][28] - However, Japan's growing military independence and capabilities have raised concerns for the U.S., which now recognizes Japan as a significant military power rather than just an ally [28][30] - The recent acknowledgment of Japan's quasi-aircraft carrier strike groups by U.S. observers marks a significant shift in perception regarding Japan's military strength [30]