Welcome to Kokyo Gaien National Garden, in the Chiyoda district of Tokyo, just south of the Imperial Palace. The Japanese name, Kokyogaien, means Imperial Palace Outer Garden, and that is exactly what it is: the open, airy forecourt to the home of the emperor. The national garden covers a little over a square kilometer. It rings the palace and brings together a landscaped plaza in front of it, 12 moats, and the Kitanomaru Garden. It is also home to three museums, and people come for its history as much as for its greenery. One thing sets the mood straight away: there is no playground equipment here. This is a place for walking, sitting, and soaking in the story of Edo Castle. Because it sits beside the Imperial Palace, it is watched over by the Imperial Palace Police and the Tokyo Metropolitan Police Department, so expect a calm, orderly atmosphere. Over the next few minutes we will look at what stood here before the plaza, the gates and moats that survive, and the statue and pine trees you will meet on your stroll.