日本功率半导体，大撤退

Group 1 - The semiconductor industry is experiencing a shift in focus, with AI chips and HBM gaining prominence, while the power semiconductor sector is losing its previous allure [1][2] - Japanese manufacturers, once leaders in power semiconductors, are facing delays in capacity expansion and losing market share to domestic competitors in China [3][4][6] - The competitive landscape for global power semiconductors is changing, with Japanese firms struggling to maintain their positions as domestic Chinese companies accelerate their growth [1][26] Group 2 - Japanese power semiconductor companies like Mitsubishi Electric, Fuji Electric, and Toshiba are showing signs of fatigue, with their market shares dropping below 5% in the latest rankings [7][9][12] - Financial struggles are evident, as companies like Rohm report significant losses and are forced to cut investment plans, while others like Renesas abandon their SiC market ambitions [9][16][21] - The rise of Chinese competitors is a critical factor in the decline of Japanese firms, as they leverage cost advantages and rapidly improve their technology [25][26][28] Group 3 - The Japanese government is attempting to support the power semiconductor industry through subsidies and strategic plans, aiming to increase market share from 20% to 40% by 2030 [6][31] - However, internal challenges such as lack of collaboration and trust among Japanese firms hinder effective industry consolidation [24][31] - The market dynamics are further complicated by changing demand patterns in the electric vehicle sector, which have not met Japanese companies' expectations [25][30]