Defense Agency relocated its main offices on 08 May 2000, leaving the entertainment district of Roppongi for a 247.3
billion yen complex on the fromer site of the Japanese Imperial Army's Imperial Headquarters in Ichigaya, near Shinjuku. At
least 7,000 agency personnel with eight organizations were moved from the 40-year-old Minato-ku facility to the traditional
Shinjuku-ku home of the military. The 23-hectare site is home to a daytime work force of 8,500. The new complex has five wings.
- A-Wing is the home of the military's central nervous system, hosting the Joint Staff Council and the Staff Offices for
each of the three branches of the Self-Defense Forces (SDF) - Ground, Maritime and Air. The wing has 23 floors, 19 of which
are above ground. The four basement floors house the central coordination center. Atop the wing are two heliports where large
helicopters can land.
- B-Wing hosts the SDF's communications corps and contains a massive, 220-meter-high communications tower.
- C-Wing is home to intelligence divisions. The two buildings each have eight floors and four basements.
- D-Wing houses the Defense Facilities Administration Agency and the Defense Agency's Central Procurement Office.