Nikken Sekkei (日建設計) is an architectural, planning and engineering Firm from Japan, with headquarters in Chiyoda, Tokyo. The practice is defined under the Company Act of Japan as 株式会社 - Kabushiki-gaisha. The term can be translated as "stock company", "joint-stock company" or "stock corporation". Today (2019), Nikken Sekkei ranks as the second largest architectural practice in the world. Nikken Sekkei works under the expression "EXPERIENCE, INTEGRATED", which shows the determination in breaking new ground in environmental design by meeting and furthering expectations. Its design solutions and environments aim to create truly meaningful experiences for people and communities around the world by integrating the company's accumulated expertise and knowledge with that of its clients’.