Nikken Sekkei (日建設計) is an architectural, planning and engineering firm from Japan, with headquarters in Chiyoda, Tokyo. Today (2019), Nikken Sekkei ranks
from the original on 2019-08-01. Retrieved 2019-08-12. "豊洲新市場の基本設計を日建設計が8610万円で受託". 日経アーキテクチュア. 2011-03-11. Retrieved 2016-07-23. Wikimedia Commons has
located in Shibuya Ward, Tokyo. The architectural design is Nikken Sekkei (日建設計). It was completed in November 1972 and started operation on June 20, 1973