Washington Heights Site (Yoyogi Park)

Washington Heights was the largest American military housing complex in occupied Japan, occupying a vast 924,000 m² (228-acre) site in Shibuya, Tokyo. Before the war, this land served as the Yoyogi Army Parade Ground (代々木練兵場), established by the Imperial Japanese Army in 1909 for military exercises and reviews. The site also holds aviation significance: on December 19, 1910, Army Captain Tokugawa Yoshitoshi conducted Japan's first successful powered aircraft flight here.

Following Japan's surrender in August 1945, the Allied occupation forces requisitioned the parade ground in December 1945. Construction of the housing complex began in August 1946 under orders from the occupation authorities, with the Japanese government bearing full responsibility and cost. The project was completed with remarkable speed — by September 1947, an entire American township of 827 housing units had been erected, along with schools, churches, a theater, shopping facilities, officers' clubs, and recreational areas. The compound was fenced and gated, off-limits to Japanese civilians, creating a conspicuous enclave of American suburban life in the heart of Tokyo.

The complex housed United States Army Air Force (later Air Force) personnel and their families throughout the occupation period and beyond. Even after the 1952 San Francisco Peace Treaty restored Japanese sovereignty, Washington Heights continued to operate under the U.S.–Japan Security Treaty. At its peak, the compound was home to approximately 3,000 American residents who lived in a self-contained community with all the amenities of a typical American town.

In 1961, the Japanese government negotiated the return of Washington Heights to serve as the athletes' village and competition venues for the 1964 Tokyo Summer Olympics. The transfer was completed on August 12, 1964, with Japan covering all relocation expenses for military families who moved to other bases including Chofu. During the Olympics, some of the former military barracks were repurposed as athlete housing — notably, the Dutch Olympic team used one of the surviving houses.

After the Olympics, nearly all the military housing was demolished. The site was transformed into Yoyogi Park (opened in 1967), the iconic Yoyogi National Gymnasium designed by Kenzo Tange, the NHK Broadcasting Center, and the National Olympics Memorial Youth Center. One original Washington Heights house survived in Yoyogi Park for decades as a historical reminder, though recent plans call for its replacement with a faithful reconstruction to preserve the memory of this unique chapter in Tokyo's postwar history.