Fukuoka Tower is a 234-metre (768 ft) tall tower located in the Momochihama area of Fukuoka, Japan. It is the tallest seaside tower in Japan. The highest observation deck at 123m has a 360 degree view of the surrounding area, the most popular time to visit is at sunset.Fukuoka Tower has a triangular cross-section which is covered with 8000 half-mirrors, giving it the appearance of a skyscraper. Because of this, it has been given the nickname “Mirror Sail”. The half-mirrors reflect the sky when viewed from outside the structure but allow visitors to see outside while riding elevators to the top. The space between the base and the observation decks is hollow and thus unoccupied. There are three observation decks: one at 116 metres, a café/lounge deck at 120 metres, and the highest at 123 metres above the ground. Above this level rises a 111-metre television mast.
The underground weight of Fukuoka Tower is 25,000 tons. Its weight above ground, by contrast, is only 3,500 tons.The tower is designed to withstand magnitude 7 earthquakes and wind speeds up to 65 m/s (145 miles per hour (233 km/h).
AloJapan.com