When the office buildings of the Meiji government were moved from this area in 1899, the whole expanse along the east side of the palace was turned into a public promenade and planted with 2,800 pine trees. The Outer Garden affords the best view of the castle walls and their Tokugawa-period fortifications: Ni-ju-bashi and the Sei-mon, the 17th-century Fujimi Yagura watchtower, and the Sakurada-mon.
Visit the Travel Talk forums for help on planning your trip