Construction of civil engineering, architecture, railway tracks, and electrical works.
Manufacture and sale of crushed stone.
Sale of materials for civil engineering and construction work.
Manufacture and sale of railway-related products.
Manufacture and sale of synthetic resin products.
Business related to processing and recycling of industrial waste.
Planning, manufacturing, construction, sale, leasing, and management of facilities for environmental conservation such as water treatment, air purification, and waste disposal, as well as manufacturing and sale of by-products and recycled products of these facilities.
Planning, manufacturing, installation, and leasing of energy-saving related equipment for electricity, fuel, etc.
Power generation business and its management and operation, as well as business related to buying and selling electricity.
Cultivation, processing, and sale of greening products.
Leasing and sale of machinery and equipment for railway track construction.
Inspection and repair services for railway track construction machinery.
Planning, development, acquisition, licensing, and sale of intellectual property rights such as industrial property rights, know-how, and software related to computers and video.
Buying, selling, leasing, and brokerage of real estate, as well as management.
Cleaning, security, and comprehensive management of buildings.
Automobile leasing business.
Manufacture, sale, leasing, maintenance, and management of parking lot equipment.
Consulting services for planning, surveying, design, and supervision of the aforementioned businesses.
Damage insurance agency business.
Planning and hosting training programs.
