Tanseisha Co Ltd is engaged in the research, planning, design, layout, construction, production and operation of commercial, public, cultural, business and event spaces. The business segments of the group are Commercial and Other Facilities Business, Chain Store Business, Cultural Facilities Business, and Others. The Commercial and Other Facilities business segment involves the interior decoration of department stores, specialty stores, restaurants, offices, hotels, and related facilities. The Chain store business segment handles the interiors of chain stores offering casual wear and fast food. The Cultural facilities business segment manages cultural facilities such as exhibitions in museums and science halls.