At the heart of the Toranomon area is the Toranomon Hills complex, completed in 2014, and opened on June 11 of the same year. As of this cache's creation (April 16, 2016), it remains Tokyo's tallest building with its highest point reaching 255.5 meters.
The cache is located near the mouth of what has been dubbed the "MacArthur Road", in homage to American General Douglas MacArthur, who led the Allied Forces in Japan following WWII, and whose office is located roughly one mile north of here. Plans were set in motion in 1946 to establish this new artery between Toranomon and Shimbashi, but were shelved soon after when the government was unable to acquire the necessary real estate to begin construction.
In 1989, with new regulations that allowed the construction of a building atop the existing road, development plans were restarted. The officially named "Shin Tora Dori" (Shimbashi - Toranomon Street) was completed in March 2014, 68 years after the street's development was first conceived. At the street's opening ceremony, Tokyo Metropolitan Governor Yoichi Masuzoe said, "it is our goal to develop an international promenade that is equivalent to Champs d’Elysees in Paris by developing fashionable storefronts and open cafés around it".