１. Civil engineering, building construction, and other construction work surveys, measurements, planning, designing, execution, supervising, technical guidance contracts, commissioning, and consulting work [consulting services]); ２. Provision of construction supplies, machinery, and appliances; ３. Real estate transactions and the ownership and use of real property and securities; ４. Soil survey and purification work contracts, business involving the collection, handling, and disposal of waste, and consulting work [consulting services] relating to such business; ５. Planning, designing, and consulting work (consulting services) relating to area development, urban development, environmental improvements, etc.; ６. Power generation, electricity, thermal, and other energy supply business, and consulting work [consulting services] relating to such business; ７. Investment in real-estate special purpose companies involving building construction contracts, the purchase and sale of equity interests therein, and the ownership and sale of trust beneficiary rights; ８. Acquisition, development, licensing, and sale of software, industrial property rights, and know-how relating to the use of computers; ９. Building Maintenance and Security Services; 10. Business incidental to each of the preceding items; 11. Joint management with others of each of the aforementioned business and investment in other business.