Sumitomo Mitsui Trust Bank (Thai) started business in October 2015, as a banking subsidiary of Sumitomo Mitsui Trust Bank, Limited in Thailand. Thailand serves as one of the largest manufacturing bases in Southeast Asia for Japanese companies. It's economy is expected to expand further on an integrated basis with surrounding countries through liberalized trade and provision of services under the framework of the soon to be established ASEAN Economic Community.

Once operations starts, Sumitomo Mitsui Trust Bank (Thai) will contribute to the further prosperity of the Thai economy as well as its customers by providing financing services and high-quality financial services unique as a trust bank and based on the expertise developed over the years within the Sumitomo Mitsui Trust Group to customers including Japanese corporate clients.