It provides an assortment of financial solutions and financial products to retail and wholesale customers, with a focus on asset management, financial brokerage and real estate services.[3]
Its main operating company is Sumitomo Mitsui Trust Bank, Limited (三井住友信託銀行株式会社, Mitsui Sumitomo Shintaku Ginkō Kabushiki Gaisha), which is the largest trust company and the fifth-largest bank in Japan measured by assets.
The company has no 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.