Sumitomo Mitsui Trust Holdings, often referred to as “Sumi Trust,” is one of Japan’s largest trust banking groups and traces its roots to the historic Sumitomo Trust and Banking founded in 1925 as part of the broader Sumitomo Group. The modern institution was formed in 2011 through the merger of Sumitomo Trust and Banking with Chuo Mitsui Trust Holdings, creating a major global trust bank offering asset management, wealth management, real estate services, and fiduciary banking. Headquartered in Tokyo, the firm manages hundreds of billions of dollars in assets and serves pension funds, institutional investors, and high-net-worth individuals both in Japan and internationally. Sumitomo Mitsui Trust is particularly known for its strength in pension asset management, real estate investment services, and long-term institutional portfolios, making it a central player in Japan’s trust banking sector.