Completed in September 2000, the DoCoMo Yoyogi Building in Tokyo reaches a height of 240 meters and houses base station equipment and switching equipment.
Power consumption is conserved through the use of CGS and solar power.
Firefighting equipment also incorporates environment-friendly features. None of the fire extinguishers installed in the building contain halogenated chemicals that would contribute to ozone layer destruction; instead, the building employs a nitrogen gas-based firefighting system.
Considerations were also made with regard to the surrounding urban landscape by constructing the tower portion of the building to enhance the city skyline.
A clock, 15 metres in diameter, was put into operation in November of 2002 to celebrate NTT DoCoMo's 10th anniversary making it the tallest clock tower in the world, surpassing Palace of Culture and Science.
The upper portion of the building features coloured lights that indicate whether one should carry an umbrella.
A garbage separation system employed within the offices helps to reduce waste and boost the waste recycling rate. Waste water is recycled for reuse and rainwater is used for toilet flushing.
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