Hosting the Olympics can put serious strain on a country’s infrastructure and finances. In preparation for the 2016 games, Rio de Janeiro has dealt with issues ranging from sewage-filled lakes to an uncompleted subway line. In Sochi in 2014, hotels went unfinished after the Winter Olympics began—the whole affair cost Russia a record $51 billion. But Japan, home of the 2020 games, wants to make the event good for their country and society. The nation has done it before. To host the 1964 Olympics, Japan launched the Tokaido Shinkansen bullet train, which revolutionized national transportation. Drawing on the Japanese sustainability concept of mottainai (“don’t waste”), Tokyo will use robot cars, holographic displays, and driverless taxis to enhance society, which should make the 2020 games a global winner.