| Road Improvement Business |
Road civil engineering, road paving, road improvement, road repair, and incidental work |
| General Civil Engineering Construction Business |
Residential land and factory site construction work/soft ground improvement work/top and bottom sewage work |
| Facility Improvement Business |
Airport runway/apron/taxiway/container yard |
| Environmental Business |
Soil improvement/melted slag recycling/oil pollution soil remediation/fell tree recycling |
| Landscape Business |
Shopping street/plaza/town planning |
| Sports Facilities Business |
Athletic stadiums/athletic fields/tennis courts/soccer fields/golf courses/bicycle courses/various sports fields |
| Special Stadium Business |
Motor vehicle test courses/racetrack pavement/auto race circuits/bicycle stadium |
| Greening Business |
Road greening/factory greening/city parks/rooftop greening/garden planning |
| Water Utilization Business |
Waterway construction/reservoir construction/slope pavement/underground storage systems |
| Manufacturing and sales of construction materials and equipment |
Manufacturing and sale of various asphalt mix materials/asphalt emulsion/DR mix/gravel/stone/sand and other materials/construction machinery design, manufacture, repair, and sale |
| Construction by-products recycling business |
Collection, transportation, processing of construction by-products, and sale of recycled construction products |
| Consulting Business |
Planning/investigations/tests/surveying/design/construction management/technical guidance/road surface measurement analysis/runway and container yard road surface measurement analysis |