Sumisho Machinery Trade Corporation

Trading of machinery and equipment

Sumitomo Shoji Machinex Co., Ltd.

Sale of machinery and equipment

Sumisho Inax Corporation

Sale of industrial washing machines

Inamoto Manufacturing Co., Ltd.

Manufacture and sale of industrial washing machines

Hokkaido District Heating Co., Ltd.

District heating and cooling in Sapporo

Summit Power Holdings Co., Ltd.

Management of overseas power generation

Summit Energy Corporation

"Planning, development and operation of domestic retailing of electric power, domestic business in electric power and energy field and controlling its 4 subsidiaries."

• Summit Mihama Power Corporation
• Summit Wind Power Corporation
• Summit Onahama S Power Corporation
• Summit Myojo Power Corporation

Perennial Power Holdings, Inc. (U.S.A.)

Management of overseas investment in power generation

MobiCom Corporation (Mongolia)

Integrated telecommunication service in Mongolia