| Chiba Kyodo Silo Co., Ltd. | Grain storage (Loading, unloading, storage and transportation of wheat, corn, oilseeds and others) |
| Feiler Japan Co., Ltd. | Import, designing and sales of the German luxury line of Chenille fabrics brand "FEILER" as exclusive importer |
| IG Kogyo Co., Ltd. | Manufacture and sales of metal siding products and others |
| KI Fresh Access, Inc. | Large area middle trader business of fresh vegetables and fruits and service center business |
| Mammy Mart Corporation | Supermarket chain |
| Nissin Sugar Co., Ltd. | Manufacture and sales of sugar |
| S.C. Building Service Co., Ltd. | Facility management of buildings (Cleaning, equipment maintenance and security) |
| S.C. Cement Co., Ltd. | Sales of cement, ready-mixed concrete and concrete products |
| SC Foods Co., Ltd. | Developmental import and sale of foods, meat, beverages, grains, fats, sugars, etc. |
| Shinko Sugar Mill Co., Ltd | Raw sugar production |
| SMB Kenzai Co., Ltd. | Sales of various building materials and construction work |
| Sumisho Building Management Co., Ltd. | Operation, management, planning and consulting service for office buildings, construction work, management and contracting for buildings and equipment including electric systems, and tenant brokerage |
| Sumisho Interior International Inc. | Interior design, construction and interior product procurement, import, export, sales of furniture and carpet, and industrial materials |
| Sumisho Montblanc Co., Ltd. | Planning, production and sales of white coats, service industry uniforms, work uniforms and related clothing products, as well as production and sale of linen materials |
| Sumisho Realty Management Co., Ltd. | Investment management business, investment advisory and agency business, Type II financial instruments business, and building lots and buildings business |
| Sumisho Tatemono Co., Ltd | Sales, brokerage, leasing and management of real estate |
| Sumisho Urban Development Co., Ltd. | Planning, development, management, and operation of shopping centers |
| Summit, Inc. | Supermarket chain |
| Summit Oil Mill Co., Ltd. | Manufacture and sales of vegetable oil, and contract manufacturing, filling and packaging |
| Tomod's Inc. | Drugstore (with dispensing function) |
| Yasato Kosan Co. Ltd. | Owning and operating of golf course |
