高市早苗“魅力外交”失败，特朗普转头宣布，对日本加税提高至50%

Group 1 - The core issue is the imposition of a 50% tariff on medium and heavy trucks imported from Japan, which significantly impacts Japanese automakers [1][2][3] - Japan is the third-largest exporter of trucks to the U.S., and this tariff is particularly detrimental as it targets Japan specifically, unlike Mexico and Canada, which have trade agreements that provide exemptions [2][5] - The U.S. tariffs come after Japan's commitment to invest $550 billion in various sectors, including energy and semiconductors, which was expected to foster better trade relations [5][7] Group 2 - The automotive industry is crucial to Japan's economy, accounting for 10% of GDP and providing over 5.6 million jobs, making the impact of the tariffs particularly severe [7] - The increase in tariffs is expected to raise costs for Japanese truck manufacturers, leading to decreased sales and further financial strain on an already struggling industry [7][9] - Previous tariffs on passenger vehicles have already caused significant profit declines in the Japanese automotive sector, with a reported 45% drop in profits for the industry following earlier tariff implementations [7]