日本功率半导体，大撤退

Core Viewpoint - The semiconductor industry is experiencing a shift in focus from power semiconductors to emerging technologies like AI chips and HBM, leading to a decline in the competitive position of Japanese power semiconductor manufacturers [2][26]. Group 1: Current Landscape of Power Semiconductors - The demand for AI chips is surging due to the rise of large models, while HBM is gaining prominence in data storage [2]. - Japanese manufacturers, once leaders in power semiconductors, are facing delays in capacity expansion and losing market share to domestic competitors [2][6]. - The global power semiconductor market is witnessing a shift, with Japanese firms' market share dropping significantly, as they now hold only three positions in the top ten rankings [6][7]. Group 2: Financial Performance of Japanese Firms - Rohm reported a net loss of 50 billion yen for the fiscal year ending March 2025, marking its first annual loss in 12 years [9]. - Mitsubishi Electric's expansion plans for a new power semiconductor factory have been postponed, reflecting a broader trend of reduced investment in the sector [19][20]. - Renesas Electronics announced a record net loss of 175.3 billion yen in the first half of 2025 and has abandoned its plans to enter the silicon carbide (SiC) market [15][16]. Group 3: Competitive Challenges - Japanese firms are struggling against fierce competition from emerging Chinese companies, which are rapidly gaining market share and driving down prices [27][30]. - The lack of collaboration and trust among Japanese semiconductor companies is hindering their ability to respond effectively to market changes [25][33]. - The Japanese power semiconductor industry is facing a critical juncture, with the need for strategic adjustments to regain competitiveness [32][33]. Group 4: Future Outlook - The Japanese government is attempting to support the power semiconductor sector through subsidies and strategic initiatives, but the effectiveness of these measures remains uncertain [6][33]. - Companies must shift their focus from solely electric vehicle applications to other growth areas such as industrial automation and energy to diversify their product offerings [33]. - The competitive landscape is evolving, and without significant changes in strategy and collaboration, Japanese firms may continue to struggle in the global market [32][33].