Subsidiaries Bank of Yokohama | Higashi-Nippon Bank | L&F Asset Finance (85%)
Affiliated Companies Kanagawa Bank | Hamagin Business Challenged | BANKCARD Service Japan (81%) | Hamagin Tokai Tokyo Securities (60%) | Hamagin Finance | Yokohama Guarantee | Yokohama Capital | Hamagin Research Institute | Sky Ocean Asset Management (30%) | The Higashi-Nippongin JCB Card (90%) | StormHarbour Japan (49%)
Overseas: Bank Resona Perdania (30%)
Corporate BIDV-SuMi TRUST Leasing | Japan Stockholder Data Service Company | J-Eurus IR | L&F Asset Finance(15%) | MFA | Sumitomo Mitsui Trust Bank (Thai) | Sumitomo Mitsui Trust Panasonic Finance | Sumitomo Mitsui Trust TA Solution | SuMi TRUST consulting | Zijin Trust
Investor Service Custody Bank of Japan | Japan Pension Operation Service | Sumitomo Mitsui Trust(Hong Kong|Ireland) | Sumitomo Mitsui Trust Bank(Luxembourg|U.S.A.) | Sumitomo Mitsui Trust Investment | Sumitomo Mitsui Trust Real Estate Investment Management
Other Asset HR One Corporation | Mutual Fund & Insurance Research Institute| SBI Sumishin Net Bank | Sumitomo Mitsui Trust Business Service| Sumitomo Mitsui Trust Career Partners | Sumitomo Mitsui Trust General Service | Sumitomo Mitsui Trust Systems & Services | Trust Base