Japan will hold a new competition to select a design for the main Tokyo 2020 Olympic stadium, abandoning a futuristic creation by British-Iraqi architect Zaha Hadid after cost estimates ballooned. “We’ll go back to the drawing board,” Prime Minister Shinzo Abe told reporters in Tokyo on Friday. Abe spoke after meeting former Prime Minister Yoshiro Mori, head of Japan’s Olympic organizing committee, and Hakubun Shimomura, the sports minister.