Kokyo Gaien National Garden (or Kōkyogaien 皇居外苑, literally 'Imperial Palace Outer Garden') is located in Chiyoda, Tokyo, just south of the Tokyo Imperial Palace.

[1] Kokyo Gaien National Garden has an area of about 450,000m2.

Though it has no playground equipment, it is often used as a place to relax and enjoy the history of Edo Castle and walk around the square.

There is surveillance by the Imperial Palace Police and the Tokyo Metropolitan Police Department, as it is adjacent to the Imperial Palace.

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