- Operations relating to development of electrical power, transportation, ports and harbors, afforestation, flood control, irrigation, land reclamation, underground resources, and other development of national land
- Research and planning related to development of electrical power, transportation, ports and harbors, afforestation, flood control, irrigation, land reclamation, development of underground resources, and other development of national land, research and design of related export plants, and consulting work related to these
- Production, sales, loan and repair of construction and mining machinery, other machinery, tools, etc., necessary for conducting our primary businesses, and related mediation activities.
- Design, contractual, and management services related to civil engineering and building construction
- Activities related to the manufacture and sale of construction materials, stone materials, chemical products, etc.
- Activities related to the sale, rental, brokerage, management, and appraisal of real estate
- Land and marine transportation, and warehousing
- Quarrying, in accordance with quarrying law
- Ownership, rental, and management of leisure facilities (golf courses, ski resorts, etc.)
- Environmental conservation activities, including soil remediation, water remediation in rivers, lakes and bays, and the collection, transport, processing, disposal and recycling of municipal, industrial and construction waste
- Production, processing and sales of agricultural products, as well as related consulting services
- Business related to the generation and supply of electricity, heat, etc.
- Investment in the business activities listed above
- All work related or incidental to the business activities listed above