Today, Roppongi is a party town. For years it’s been popular with foreigners due to its proximity to so many foreign embassies. Because of this proximity, the area is relatively English-friendly which makes it a destination for foreigners visiting Japan and the seedy businesses that often cater to (or try to take advantage of) foreigners. But in the Edo Period, this was home to sprawling mansions of the elite ruling class. Many of the street blocks still correspond to the locations of these residences.
Easiest place name ever.