Tokyo Skytree is the tallest building in Japan in 2010.It is use as broadcasting, restaurant, and observation tower.(Source)

Building Name- Tokyo Skytree
Building Type- Broadcast, restaurant, and observation tower
Location- Sumida, Tokyo, Japan
Construction Started- 14 July 2008
Construction Finished- 29 February 2012
Buildin Opened- 22 May 2012
Budget- 806 million USD
Antenna spire- 634.0 m (2,080 ft)
Roof- 495.0 m (1,624 ft)
Top floor- 451.2 m (1,480 ft)
No of Lifts- 13
Architect- Nikken Sekkei