At the top of the tower, there is a system called dynamic damper. It is about 15 tons and it moves in the direction opposite to the direction in which the main body of the tower shakes, so that it decreases the shake of the main body of the tower. Therefore, it protects the tower from earthquakes and the strong wind. The tower can withstand wind up to per second () and earthquakes up to 7 on the Japan Meteorological Agency seismic intensity scale.