1.
Nagatachō; the world of national politics
A district of Chiyoda Ward, Tokyo, home to the National Diet Building, the Prime Minister's Office, and party headquarters. By metonymy, like "Washington" in American English, it means the world of national politicians.
国会議事堂は永田町にある。
The National Diet Building is in Nagatachō.
Related Words
Compare:
霞が関 (the central bureaucracy)
Compare:
政界 (the political world)
Related:
国会議事堂 (the National Diet Building)