SMBC Group | 339,942 followers on LinkedIn. Sumitomo Mitsui Banking Corporation | SMBC Group is a top-tier global financial group. Headquartered in Tokyo and with a 400-year history, SMBC Group offers a diverse range of financial services, including banking, leasing, securities, credit cards, and consumer finance. The Group has more than 150 offices and 120,000 employees worldwide in nearly 40 countries.