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Japan Trustee Services Bank

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A Japanese trust bank that provided institutional asset administration, securities custody, and related trustee services before merging into Custody Bank of Japan in 2020.

Last updated August 25, 2026

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Overview

Japan Trustee Services Bank, commonly abbreviated as JTSB, was a Japanese trust bank focused on back-office and fiduciary services for institutional investors rather than conventional retail banking. It was established in Tokyo on June 20, 2000, by Daiwa Bank and Sumitomo Trust & Banking Co., Ltd., and began operations on July 25 of the same year. Its business model was based on acting as a subcontracted trustee for its banking sponsors and holding and administering assets belonging to their customers. These assets included pension-fund portfolios, investment trusts, and other securities-related holdings. JTSB occupied a specialized position in Japan's financial infrastructure. Its activities centered on the safekeeping and administration of securities, trustee operations, asset accounting, settlement-related processing, and associated services for institutional portfolios. The bank was therefore a service provider to financial institutions and asset owners rather than a consumer-facing brand with a broad branch network. Its role also reflected the separation of front-office investment management from the operational custody and administration functions required to support large pools of institutional capital. The bank's ownership and business relationships evolved as Japan's financial groups consolidated. Sumitomo Trust transferred part of its trust business and other assets to JTSB in October 2000, while Daiwa transferred assets and operations in June 2001. The Mitsui Trust Financial Group invested in the bank in 2002 and moved some of its trust operations to JTSB in 2003. Subsequent reorganizations of its sponsoring groups changed the institutional context around the bank: Daiwa Bank became part of Resona Bank after its 2003 merger with Asahi Bank, and Sumitomo Trust later combined with Chuo Mitsui Trust Holdings in April 2011 to create Sumitomo Mitsui Trust Holdings. JTSB operated alongside other major Japanese custody and trust-service institutions. Its principal competitors included The Master Trust Bank of Japan, associated with Mitsubishi UFJ Financial Group and Nippon Life Insurance, and Trust & Custody Services Bank, associated with Mizuho Financial Group. JTSB's SWIFT identifier was JTSBJPJT. The bank's independent existence ended in July 2020, when it merged with Trust & Custody Services Bank to create Custody Bank of Japan. As a result, Japan Trustee Services Bank is now a defunct legal and brand entity, while its institutional custody and trustee role continued through the successor organization. The available reference material does not identify a current website, publicly traded securities, financial results, or named executives for the former bank.

History

Japan Trustee Services Bank was created during a period when Japanese financial groups were reorganizing specialized trust and custody activities. Daiwa Bank and Sumitomo Trust & Banking Co., Ltd. established the bank on June 20, 2000. It commenced operations on July 25, 2000, with a mandate centered on trust administration and custody work for institutional assets. The founders subsequently transferred relevant business assets into the new entity. Sumitomo Trust moved part of its trust business and other assets to JTSB in October 2000, and Daiwa completed a corresponding transfer in June 2001. The Mitsui Trust Financial Group became an investor in 2002 and transferred some of its trust operations to JTSB in 2003. These steps broadened the bank's role within the Japanese trust-bank and securities-administration system. JTSB functioned primarily as a subcontracted trustee for its sponsoring financial institutions. It held and administered customer assets, including pension-fund and investment-trust assets, and supported the operational processes associated with institutional portfolios. Its activities were consequently distinct from ordinary retail banking: the bank's customers and counterparties were principally financial institutions and institutional asset owners, while its services emphasized custody, fiduciary administration, asset records, and related securities processing. The corporate groups connected with JTSB changed over time. Daiwa Bank merged with Asahi Bank in 2003 to form Resona Bank. Sumitomo Trust later merged with Chuo Mitsui Trust Holdings in April 2011, producing Sumitomo Mitsui Trust Holdings. JTSB remained part of a competitive Japanese custody market that also included The Master Trust Bank of Japan and Trust & Custody Services Bank. In July 2020, JTSB merged with Trust & Custody Services Bank. The combination created Custody Bank of Japan and brought Japan Trustee Services Bank's independent corporate history and brand to an end. The available reference material does not provide a complete account of its leadership, financial performance, branch network, or detailed product architecture.

  • 2020

    Merged into Custody Bank of Japan

    [1]

    JTSB merged with Trust & Custody Services Bank in July 2020 to form Custody Bank of Japan.

  • 2003

    Mitsui Trust operations transferred

    [1]

    The Mitsui Trust Financial Group transferred some of its trust operations to JTSB.

  • 2002

    Mitsui Trust Financial Group invests

    [1]

    The Mitsui Trust Financial Group invested in JTSB.

  • 2001

    Daiwa transfers business assets

    [1]

    Daiwa followed with a transfer of relevant trust business and other assets in June 2001.

  • 2000

    Japan Trustee Services Bank established

    [1]

    Daiwa Bank and Sumitomo Trust & Banking Co., Ltd. established JTSB on June 20, 2000.

  • 2000

    Operations begin

    [1]

    JTSB began operating on July 25, 2000.

  • 2000

    Sumitomo Trust transfers trust assets

    [1]

    Sumitomo Trust transferred part of its trust business and other assets to JTSB in October 2000.

Products and positioning

A specialist Japanese institutional trust and custody provider serving banks, pension funds, investment trusts, and other large asset owners through operational, fiduciary, and securities-administration infrastructure.

  • Trust banking · 2000

    Institutional trust services

    JTSB acted as a specialist trustee for financial institutions and their institutional customers. The service involved holding and administering customer assets within trust structures, with emphasis on operational control, records, and fiduciary administration rather than retail deposit-taking.

  • Securities custody · 2000

    Securities custody and administration

    The bank provided custody and administrative support for securities held on behalf of institutional investors. This included maintaining asset records and supporting the processing associated with securities portfolios and institutional investment operations.

  • Institutional asset administration · 2000

    Pension-fund asset administration

    JTSB held and administered assets belonging to pension funds. This formed part of its role as a subcontracted trustee and positioned the bank within Japan's institutional retirement-asset infrastructure.

  • Investment-trust services · 2000

    Investment-trust asset administration

    The bank administered assets connected with investment trusts, providing custody and related operational support for pooled investment vehicles and their institutional holdings.

Brand decisions

  • 2020

    Combination with Trust & Custody Services BankM&A

    Background

    JTSB operated in Japan's specialized institutional custody and trust-services market, where other major financial groups also maintained competing providers.

    Action taken

    Japan Trustee Services Bank merged with Trust & Custody Services Bank in July 2020 to establish Custody Bank of Japan.

    Aftermath

    JTSB ceased to exist as a separate legal and brand entity, while the combined organization continued in the custody-bank sector.

Sources1 sources

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