Sumitomo Mitsui Trust Holdings, Inc., formerly Chuo Mitsui Trust Holdings, Inc., is a Japanese financial holding company headquartered in Chiyoda, Tokyo. It provides an assortment of financial products to retail and wholesale customers, with a focus on asset management, financial brokerage, and real estate services. Its main operating company is Sumitomo Mitsui Trust Bank, Ltd, which is the largest trust company and the fifth-largest bank in Japan measured by assets. The company has no direct capital relationship with the Sumitomo Mitsui Financial Group; the two banking groups are similarly named because both are descended from the historical Sumitomo and Mitsui conglomerates. There is just a weak control relationship between Sumitomo Mitsui Trust Holdings and Sumitomo Mitsui Financial Group. In fact SM Trust Holdings controls about 66% of Japan Trustee Services Bank. As of March 31, 2017, SM Financial Group's website reports that Japan Trustee Services Bank owned 5.50% of Sumitomo Mitsui Financial Group, but also 1.52% from trust location n. 1, 1.50% from trust location n. 2, 2.05% from location n. 5, 1.36% from trust location n. 7, and 1.85% from trust location n. 9 as well. Wikipedia