- Sumitomo Group Public Affairs Committee
- Sumitomo Chemical Co., Ltd.
- Sumitomo Heavy Industries, Ltd.
- Sumitomo Mitsui Banking Corporation
- Sumitomo Metal Industries, Ltd.
- Sumitomo Corporation
- Sumitomo Mitsui Trust Bank, Limited
- Sumitomo Life Insurance Company
- Sumitomo Warehouse Co., Ltd.
- Sumitomo Electric Industries, Ltd.
- Mitsui Sumitomo Insurance Co., Ltd.
- Nippon Sheet Glass Co., Ltd.
- NEC Corporation
- Sumitomo Realty & Development Co., Ltd.
- Sumitomo Osaka Cement Co., Ltd.
- Sumitomo Light Metal Industries, Ltd.
- Sumitomo Mitsui Construction Co., Ltd.
- Sumitomo Bakelite Co., Ltd.
- Sumitomo Forestry Co., Ltd.
- Sumitomo Rubber Industries, Ltd.
