Sumitomo Mitsui Banking Corporation is a Japanese multinational banking financial services institution owned by Sumitomo Mitsui Financial Group, Inc . It is headquartered in Yurakucho, Chiyoda, Tokyo, Japan. The group operates in retail, corporate, and investment banking segment worldwide. It provides financial products and services to a wide range of clients, including individuals, small and medium-sized enterprises, large corporations, financial institutions and public sector entities. Since 2011, it has been included into the Financial Stability Board's list of global systemically important banks.

Yūrakuchō (有楽町) is a business district of Chiyoda, Tokyo, Japan, situated in between the Ginza and Hibiya Park, southeast of the Tokyo Imperial Palace. The district takes its name from Oda Nagamasu (1547–1622), who was also known as Yūraku (有楽). Oda Nagamasu built his mansion here on land granted by Tokugawa Ieyasu near the Sukiya-bashi Gate of Edo Castle. The place name dates from the Meiji period.