TANAKEN is a Japan-based company mainly engaged in demolition work of the building structure and supervision of various constructions incidental thereto. The Company provides overall business including current situation survey, proposal of construction method, design, construction plan, neighbor correspondence and among others. The Company also provides supervise construction work related to building construction demolition work, mountain work, basic demolition work and pile removal work. In addition, it proposes and provides various dismantling works in cost, construction term and safety concerning removal of harmful pollutants such as polychlorinated biphenyl (PCB), groundwater purification and soil improvement. The Company carries out work supervision, safety control, neighbor communication, guides and supervises cooperative companies, and carries out demolition work.