Japan Trustee Services Bank, Ltd. (日本トラスティ・サービス信託銀行株式会社), or JTSB, is a trust bank in Japan.
JTSB is a joint venture between Resona Bank and Sumitomo Mitsui Trust Holdings, and acts as a subcontracted trustee for both banks to hold their customers' assets, which include pension fund and investment trust assets.[2] Its main competitors are The Master Trust Bank of Japan (controlled by Mitsubishi UFJ Financial Group and Nippon Life Insurance) and Trust & Custody Services Bank (controlled by Mizuho Financial Group).
JTSB's SWIFT (ISO 9362) code is JTSBJPJT.
In July 2020 JTSB merged with the Trust & Custody Services Bank to form Custody Bank of Japan.