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 changing competitive landscape where Japanese manufacturers are losing their previous advantages [1][2][29]. Group 1: Current Trends in Power Semiconductors - The demand for AI chips is surging due to the rise of large models, while HBM is gaining prominence in data storage due to its high bandwidth characteristics [1]. - Japanese manufacturers, once leaders in power semiconductors, are facing delays in capacity expansion and losing market share to domestic competitors in China [1][2][29]. Group 2: Japanese Manufacturers' Challenges - Japanese companies like Mitsubishi Electric, Fuji Electric, and Renesas are struggling with declining market shares and financial performance, with some reporting significant losses [9][22][25]. - The competitive landscape is shifting, with Japanese firms now holding only three positions in the global top ten power semiconductor manufacturers, all with market shares below 5% [7][12][25]. Group 3: Financial Performance of Key Players - ROHM reported a net loss of 50 billion yen for the fiscal year ending March 2025, marking its first annual loss in 12 years, while also facing a significant drop in operating profit [9][22]. - Renesas Electronics announced a record net loss of 175.3 billion yen in the first half of 2025 and has decided to abandon its plans to enter the silicon carbide (SiC) market [15][18][29]. Group 4: Market Dynamics and Competition - The rise of Chinese semiconductor companies is significantly impacting Japanese firms, with Chinese manufacturers rapidly gaining market share and driving down prices [29][30]. - The global electric vehicle market's slower-than-expected growth is affecting demand for power semiconductors, further complicating the situation for Japanese manufacturers [29][32]. Group 5: Strategic Responses and Future Outlook - Japanese companies are attempting to adapt by forming partnerships and seeking new market opportunities, but these efforts are often hindered by internal competition and lack of collaboration [25][35]. - The Japanese government is pushing for increased investment in the semiconductor sector, aiming to boost the market share of domestic companies, but challenges remain in execution and coordination [35].