みずほフィナンシャルグループ
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. Its main competitors are The Master Trust Bank of Japan (controlled by Mitsubishi UFJ Financial Group and Nippon Life Insurance) and Trust &amp; Custody Services Bank (controlled by Mizuho Financial Group).