This paper critically examines Japanese corporate governance, evaluating its role as a benefit or constraint in achieving equity and efficiency. It contrasts Japan's stakeholder-oriented model, characterized by long-term stability and employee-centric management, with the shareholder-focused frameworks of the United States and the United Kingdom. The analysis focuses on the unique roles of CEOs in Japan, emphasizing their responsibility toward employee welfare over short-term financial gains. It further explores Japan's historical business structures, including Zaibatsu and Keiretsu, which foster interconnected corporate networks but limit flexibility and innovation. The relationship between firms and main banks within Keiretsu is analyzed, highlighting their role in financial oversight and stability. Additionally, the study addresses Japan's "Three Sacred Treasures" of labor-management relations—lifetime employment, seniority-based wages, and enterprise unions—as integral to its governance approach. Despite its strengths, Japan’s model faces challenges, including limited board independence and slow decision-making processes. Recent reforms aimed at increasing transparency and aligning with global governance standards are discussed, suggesting a shift toward a hybrid model that blends traditional stability with market responsiveness. This paper provides a comprehensive analysis of the evolving dynamics of Japanese corporate governance, offering insights into its impact on Japan’s global economic competitiveness.