Roppongi’s Hardy Barracks, a little-known U.S. base in the middle of Tokyo www.japantimes.co.jp

Yokota Air Base and the Yokosuka naval base are well-known U.S. bases in the Tokyo area. But few people know the U.S. military also has a major facility right in the heart of the city.

Since 1945, U.S. Forces Japan has been keeping an off-limits heliport and buildings in a complex near the Roppongi entertainment district.