Hanzōmon Station is a subway station on the Tokyo Metro Hanzōmon Line in Chiyoda, Tokyo, Japan, operated by the Tokyo subway operator Tokyo Metro. It is located near the Hanzōmon Gate of the Imperial Palace.
The station was the eastern terminal of the Hanzōmon Line from 1982 to 1989 and is still used as a terminal for some morning rush hour trains. It is the only station on the Hanzōmon Line not to connect with any other subway or railway lines; however, it is a five-minute walk from Kōjimachi Station on the Tokyo Metro Yurakucho Line.
Wikipedia https://en.wikipedia.org/wiki/Hanzōmon_Station
Coordinates 35°41'6.796" N 139°44'29.7" E
