NTT Docomo Yoyogi Building, Communication tower in Sendagaya, Japan
The NTT Docomo Yoyogi Building is a telecommunications tower and office block in the Sendagaya district of Tokyo, rising 240 meters high with 27 floors above ground. A prominent clock measuring 15 meters in diameter adorns the upper facade and can be seen from across the city skyline.
Construction began in December 1997 and lasted until September 2000 to meet the growing demand for mobile phone infrastructure in Tokyo. The tower was built during a time when cell phones became widespread in Japan and networks needed rapid expansion.
The name comes from NTT Docomo, Japan's largest mobile carrier, which uses the tower as its headquarters. The giant clock face on the tower tells the time for residents and commuters in the busy district around Yoyogi Station.
The main building is closed to the public as it houses offices and technical facilities. However, restaurants in the separate annex building near Yoyogi Station offer the chance to experience the area and view the tower from the outside.
The upper spire contains no actual floors but is a hollow structure concealing vital communication antennas. A 32-meter crane inside this hollow section remains permanently installed for technical maintenance work.
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