Architectural design must practice green building as a necessary element in a sustainable society, and the green building of curtain walls must manage environmental performance and material recycling. Through our experience in Japan's harsh environmental and climatic conditions, we have earned an edge in environmental technologies. We share that edge, and our understanding of the needs of architectural design, as we collaborate closely with architects. We realize their concepts with curtain wall engineering solutions that encompass all elements of design, procurement, manufacturing, construction, and maintenance, while taking us closer to a sustainable society.