Mizuho Financial Group, Inc. operates as a universal bank and financial holding company, serving as one of Japan's three megabanks alongside MUFG and SMFG. The company's business model is structured around five core segments: Retail & Business Banking, Corporate & Institutional Company, Global Corporate Company, Global Markets Company, and Asset Management Company. Mizuho generates revenue primarily through net interest income from its massive lending portfolio, as well as fee and commission income from investment banking, wealth management, and trust services. Geographically, while Japan remains its primary market and largest source of deposits, Mizuho has a substantial global footprint with operations in over 30 countries, providing corporate finance, syndicated lending, and capital markets services to multinational corporations. The group's key subsidiaries include Mizuho Bank, Mizuho Trust & Banking, and Mizuho Securities. Competitively, Mizuho leverages its historical ties to the Fuyo, Dai-Ichi Kangyo, and IBJ corporate groups, giving it banking relationships with a vast majority of companies listed on the Tokyo Stock Exchange. This deep integration into Japan's corporate sector, combined with its expanding overseas investment banking and asset management capabilities, solidifies its position as a systemically important global financial institution.