In Tokyo, a developer who plans a mid-rise or high-rise building must put up a sign on the site that announces the plan. Under Article 5 of a Tokyo ordinance of July 1978 on preventing and settling disputes over such buildings, the sign goes up before the developer applies for building confirmation.
Under Article 6, the developer must explain the plan to neighbors who ask for it. The neighbors are the people within a distance of twice the building’s height from the site boundary. The Tokyo Metropolitan Government advises holding the explanation even before anyone asks.