日本为何造不出商用飞机？

Core Viewpoint - Mitsubishi Heavy Industries has made the difficult decision to abandon its regional jet project, marking a significant setback for Japan's aviation industry, which has seen a decline from its historical prominence in aircraft manufacturing over the past 67 years [1][2]. Group 1: Historical Context of Japanese Aviation Industry - The Japanese aviation industry began in the early 20th century, primarily driven by military needs, with significant government support and investment [3][4]. - Post-World War II, Japan's aviation industry faced severe restrictions from the U.S., leading to a complete collapse of its aircraft manufacturing capabilities [4][5]. - The YS-11 project, Japan's first post-war commercial aircraft, was launched in 1956 but ultimately failed due to market misjudgments and safety concerns, resulting in significant financial losses [10][11][12]. Group 2: Shift to International Cooperation - In the 1980s, Japan shifted its strategy from independent aircraft development to international cooperation, primarily with Boeing, to mitigate risks and align with global production trends [19][20]. - Japanese companies participated in various Boeing projects, contributing to components but remained excluded from core design and development roles, limiting their technological advancement [24][26]. Group 3: Recent Developments and Challenges - The MRJ project, initiated in 2008, aimed to revive Japan's commercial aircraft manufacturing but faced numerous setbacks, including design changes and financial pressures, leading to its eventual cancellation [33][35]. - Japan's reliance on the U.S. market and technology has hindered its ability to independently develop competitive aircraft, as seen in the struggles of the SpaceJet project [39][40]. - In contrast, China's ARJ21 project has successfully entered the market, highlighting the differences in approach and outcomes between the two countries' aviation industries [40][41].