The announcement was met by scenes of jubilation in Argentina.
As the International Olympic Committee announced that Tokyo had been chosen to host the 2020 Games ahead of Istanbul and Madrid, the city's delegation jumped to their feet.
Many, overcome with emotion after two years of intense lobbying, wept.
Japanese Prime Minister Shinzo Abe, who had allayed fears over the crippled Fukushima nuclear plant, could not hide his delight. He said:
‘It has been a long and difficult competition and I would like to salute all sportsmen (and women) as well as the Governor of Tokyo and the active athletes, for their support to win the bid to host the Olympic games. Without their efforts we would not have been able to win.’
The joy was just as obvious in Tokyo when residents awoke to the news.
The decision means Tokyo will become the first Asian city to host the Games twice, while Istanbul and Madrid go home empty handed again.