Nijubashi Bridge Introduction: Nijubashi Bridge (Nijubashi Bridge) is located in front of the main entrance of the Imperial Palace. In front of it is the Main Gate Stone Bridge, also known as the Glasses Bridge. It is the best photo location in Tokyo. The double bridge refers to the main iron bridge made of steel inside. In the early years, because the moat was deep and the old bridge was low, another bridge was built on the bridge with upper and lower floors, hence the name.