■ Waterproofing and repair work for concrete structures ■ Various waterproofing works for civil engineering and buildings (sheet waterproofing, etc.) ■ Maintenance and repair work for structures (tunnel and bridge repairs, reinforcement, etc.) ■ Various waterproofing and anti-corrosion works, as well as maintenance and repair works for water supply and sewage facilities ■ Measures against tunnel water leakage and manufacturing and sales of materials for line drainage work B4 (Three S method) ■ Manufacturing and sales of various waterproofing and water-stopping materials