The Tokyo Metro Museum is located beneath the elevated tracks of Kasai Station on the Tozai Line (station code T17). To reach it, take the Tozai Line and get off at Kasai Station—make sure to take a local train, as express trains do not stop at this station. The museum is only about 100 meters from the station. You'll know you're in the right place when you see the entrance designed to look like a subway ticket gate. The museum's full address is 6-3-1, Higashi-kasai, Edogawa-ku, Tokyo, 134-0084.