The Nijubashi Bridge is located in front of the Imperial Palace main gate. If you participate in the visit of the general public to the Imperial Palace, you can cross the Nijubashi Bridge.
A mere 2-minute walk from Tokyo Metro Sakuradamon Station and a 3-minute walk from Hibiya Station and Nijubashi Station, the Nijubashi Bridge is located in front of the Imperial Palace main gate. Also known as "Ninohashi" or "Tsukimihashi," it is the bridge that goes over the moat from the Imperial Palace Plaza through the main gate to the palace.
There are two bridges in front of the Imperial Palace main gate, the iron bridge that can be seen in the background from the plaza, called the "Seimon-tetsubashi Bridge," and the stone bridge in the foreground, which is called the "Seimon-ishibashi Bridge." Some people mistakenly believe "Nijubashi" to be the general name for both bridges, but "Nijubashi" officially refers to the Seimon-tetsubashi Bridge.
Built in the Edo Period, the Nijubashi Bridge was formerly a wooden bridge called "Nishinomaru Gejobashi." At the time, the part of the moat where the bridge was built was deep, so the bridge was designed by stacking it on top of the logs that served as the base to support the girders. It is said that the bridge began to be called "Nijubashi(double bridge)" because it seemed to have a double structure. Later on, it became an iron bridge in 1888 (Meiji 21) and was repaired in 1964 (Showa 39) to arrive at its current appearance. When it was remodeled, state-of-the-art anti-rust technologies such as zinc spray were introduced in Japan for the first time.
The Seimon-ishibashi Bridge in the foreground is made of granite and was designed in a Western architecture style. These two bridges are used for official events such as the general congratulatory visit by the public on New Year's, and for visits by foreign guests, but it is usually closed to the public. However, if you participate in the visit of the general public to the Imperial Palace, which is held once in the morning and once in the afternoon from Tuesday to Saturday excluding holidays, in addition to the Nijubashi Bridge you can also see other areas such as the Fujimi-yagura (Mt. Fuji-view keep) inside the palace and the exterior of the palace.
The Nijubashi Bridge can usually be seen up-close if you walk for a little while with the Imperial Palace Plaza's "Nijubashi-bori Moat" on your left, and you can feel its majestic presence in its sophisticated structure.