FILE - This artist rendering file released by Japan Sport Council shows the new National Stadium, which will be the main venue for the Tokyo 2020 Summer Olympics. The Olympics building spree could be a welcome boon for the economy. But there are doubts over the costs and scale of some of the proposed projects, especially an 80,000-seat stadium designed by British-Iraqi architect Zaha Hadid that was the centerpiece of Tokyo’s 2020 bid. (AP Photo/Japan Sport Council, File)