But just five years before the world's biggest sporting event returns to Tokyo for the first time since 1964, concerns over budget-busting construction costs have forced organisers into drastic changes that will result in a very different Games than the ones promised.
Rising labour and construction costs have forced Tokyo to rethink its plans for 10 venues it intended to build for the Games, reneging on a bid commitment to host a majority of events within 8 km (5 miles) of the Olympic village.
The IOC said in February organisers were to move or alter three venues, saving around $1 billion, and that there would be changes and cost-cutting measures to come.
Japan's Sports Minister Hakubun Shimomura said this week that Tokyo's new National Stadium, the centrepiece of the 2020 Olympic Games and 2019 rugby World Cup, should ditch plans for a retractable roof to save money.

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