The Imperial Palace in Tokyo, Japan, was built by the Edo Shogunate in 1657, and only became the residence of the Emperor of Japan in 1888, with a vast moat surrounding the city. The main entrance is usually closed, only when the emperor is the grand ceremony, emperor, queen, queen, queen burial ceremony and other special matters or foreign guests visit. The order used is: the front square of the imperial residence - the main entrance stone bridge - the main entrance iron bridge - the palace. In addition to the vast square, the Japanese representative historical buildings such as Sakurada Gate and the Duoqiao are also here. The outer garden of the imperial residence refers to the area of the north of the maru area (north of the maru park) opened in 1969 (showa 44), the outer garden of the imperial residence area, and the outer surrounding area of the imperial residence, usually refers to the area centered on the imperial residence square. It may be the reason for the fire. The square in front of the main entrance of the imperial residence is not covered with plants and is paved with rubble. The area far away from the imperial residence is densely wooded and green grass, which looks pleasing to the eye. There is also a bronze statue of the famous medieval martial general of japan. The entire imperial residence outer garden area is open, free admission, and there is no time to open and close the park.