三井不動産
In 1988, the Japanese government authorized a large-scale relocation of various government agencies in order to re-develop prime government land for commercial purposes. As part of this plan, it was decided in the 1990s to move the JDA headquarters and re-develop the site. The base was formally closed in May 2000 and its functions were relocated to Ichigaya. A consortium of developers including Mitsui Fudosan, Sekisui House, and several life insurance companies won a public tender to purchase the site, paving the way for its development as Tokyo Midtown. Construction began in 2004 and was completed in 2007.