Japan Sports Council revealed the design of New National Stadium on May 28. A planned main venue of 2020 Tokyo Olympic Games will have a 210,000m2 total floor area equipped with movable seats, retractable sound insulating roof, and seismic base isolation. The total construction cost is estimated at 162.5 billion yen. The demolition works of the present structure will start in July and reconstruction is scheduled to commence from October 2015 to March 2019. A group of design firms such as Nikken Sekkei, Azusa Sekkei, Nihon Sekkei and Arup is in charge of designing.
The new stadium will have 80,000 seats with three story stands. The height is reduced to 70m from initially planned 75m. 15,000 movable seats will be installed on the first floor and the layout will be changeable according to the purpose of use such as football and concerts. (2014/05/29)