Trust & Custody Services Bank
A Japanese specialist bank that administered and safeguarded assets for financial institutions before merging into Custody Bank of Japan.
Last updated August 26, 2026
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Overview
Trust & Custody Services Bank was a Japanese specialist financial institution focused on asset administration and custody services rather than conventional retail banking. Its legal Japanese name was Shisan Kanri Service Shintaku Ginko Kabushiki Gaisha, and its business was directed primarily toward banks, insurance companies, and other institutional clients. The bank handled operational functions associated with entrusted assets, including the administration, safekeeping, and related processing of investment and other financial assets. The institution was established in January 2001 following an agreement among a group of major Japanese banking and insurance organizations. The founding participants included Mizuho Trust & Banking, Dai-Ichi Kangyo Bank, Fuji Bank, Industrial Bank of Japan, Asahi Mutual Life Insurance, Dai-ichi Mutual Life Insurance, Fukoku Mutual Life Insurance, and Yasuda Mutual Life Insurance. The formation reflected the growing need for dedicated infrastructure to manage institutional assets and securities operations as Japan’s financial sector reorganized and increasingly separated asset-management and custody functions from other banking activities. By 2006, the bank was reported to administer approximately 900 billion U.S. dollars in assets. This scale positioned it as an important back-office and fiduciary-services provider within Japan’s financial system, even though it was not a consumer-facing brand with a broad branch network or mass-market product portfolio. Its role was primarily business-to-business: serving financial institutions that required specialized administration, settlement, custody, and trust-related capabilities. The bank later became part of a broader consolidation of Japan’s trust and custody infrastructure. In July 2020, Trust & Custody Services Bank merged with Japan Trustee Services Bank to create Custody Bank of Japan. Following that transaction, Trust & Custody Services Bank ceased to operate as a separate institution. Its legacy therefore lies in the institutional custody and asset-administration capabilities transferred into the successor bank, rather than in an ongoing standalone brand.
History
Trust & Custody Services Bank was founded in January 2001 as a Japanese specialist bank serving the institutional side of the financial sector. Its establishment followed an accord involving Mizuho Trust & Banking, Dai-Ichi Kangyo Bank, Fuji Bank, Industrial Bank of Japan, and four life insurers: Asahi Mutual Life Insurance, Dai-ichi Mutual Life Insurance, Fukoku Mutual Life Insurance, and Yasuda Mutual Life Insurance. The founding structure brought together major banking and insurance interests at a time when Japanese financial institutions were reorganizing their operations and developing more specialized platforms for asset administration and custody. The bank’s purpose was to provide services connected with the administration and safekeeping of assets held by financial institutions. Rather than competing as a general-purpose retail bank, it operated as an institutional-services provider. Its activities included trust-related administration, custody functions, and operational support for banks and insurance companies. These functions are important to financial institutions because they separate the day-to-day administration and protection of assets from investment decision-making and other banking activities. The institution reached considerable scale during its independent operation. By 2006, it was reported to have approximately 900 billion U.S. dollars in assets under management or administration. The available reference material describes this figure as an indication of the bank’s scale, although it does not provide a detailed breakdown of the assets or the exact reporting basis. The bank’s importance consequently came from its role in Japan’s financial infrastructure and its institutional client base, rather than from consumer recognition. Trust and custody operations in Japan subsequently became subject to further structural consolidation. In July 2020, Trust & Custody Services Bank merged with Japan Trustee Services Bank. The transaction established Custody Bank of Japan, which became the successor platform for the combined custody and asset-administration operations. Trust & Custody Services Bank therefore became defunct as a separate legal and commercial entity after the merger. Its history is best understood as part of the development and consolidation of Japan’s specialist trust-bank and institutional custody sector.
- 2020
Merger creates Custody Bank of Japan
[1]In July, Trust & Custody Services Bank merged with Japan Trustee Services Bank to form Custody Bank of Japan. The former institution ceased to operate independently.
- 2006
Large institutional asset base reported
[1]The bank was reported to have approximately 900 billion U.S. dollars in assets under management or administration, illustrating the scale of its institutional custody and asset-services activities.
- 2001
Institution established
[1]Trust & Custody Services Bank was established in January through an agreement among major Japanese banks and life insurers, including Mizuho Trust & Banking and several predecessor banking and insurance institutions.
Products and positioning
A specialist Japanese financial-services institution providing fiduciary, custody, and asset-administration infrastructure for institutional clients rather than retail consumers.
Trust banking
Institutional trust services
The bank provided trust-related administration for institutional clients. These services supported the handling of assets entrusted by banks, insurers, and other financial organizations, and formed part of the specialist fiduciary infrastructure that distinguished the institution from a conventional retail or commercial bank.
Custody services
Asset custody and safekeeping
Custody services involved the safekeeping and administrative control of financial assets for institutional customers. The offering was designed to support clients that needed a specialist provider for asset protection and related operational processes rather than managing every custody function internally.
Asset administration
Institutional asset administration
Trust & Custody Services Bank administered assets and associated financial operations for banks and insurance companies. The service area covered the back-office and fiduciary activities required to maintain institutional portfolios and custody relationships, although the available sources do not provide a complete product catalogue.
Brand decisions
2020
Consolidation with Japan Trustee Services BankM&ABackground
The Japanese institutional custody and trust-banking sector was consolidated through a combination of specialist providers.
Action taken
Trust & Custody Services Bank merged with Japan Trustee Services Bank in July 2020 to establish Custody Bank of Japan.
Aftermath
Trust & Custody Services Bank ended as a standalone institution, with its operations incorporated into the successor bank.
Sources1 sources
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