BUENOS AIRES, Argentina — Tokyo was awarded the 2020 Olympics on Saturday, capitalizing on its reputation as a "safe pair of hands" and defying concerns about the Fukushima nuclear crisis.
Tokyo defeated Istanbul 60-36 in the final round of secret voting by the International Olympic Committee. Madrid was eliminated earlier after an initial tie with Istanbul.
Tokyo, which hosted the 1964 Olympics, billed itself as the reliable choice at a time of global political and economic uncertainty — a message that resonated with the IOC.
"Tokyo can be trusted to be the safe pair of hands and much more," bid leader and IOC member Tsunekazu Takeda said in the final presentation. "Our case today is simple. Vote for Tokyo and you vote for guaranteed delivery. ... Tokyo is the right partner at the right time."
Tokyo had been on the defensive in the final days of the campaign because of mounting concerns over the leak of radioactive water from the tsunami-crippled Fukushima nuclear plant.
In the final presentation, Japanese Prime Minister Shinzo Abe gave the IOC assurances that the Fukushima leak was not a threat to Tokyo and took personal responsibility for keeping the games safe.
"Let me assure you the situation is under control," Abe said. "It has never done and will never do any damage to Tokyo."
Abe gave further assurances when pressed on the issue by Norwegian IOC member Gerhard Heiberg.
"It poses no problem whatsoever," Abe said in Japanese, adding that the contamination was limited to a small area and had been "completely blocked."
"There are no health related problems until now, nor will there be in the future," he said. "I make the statement to you in the most emphatic and unequivocal way."
Tokyo Electric Power Co., Fukushima's operator, has acknowledged that tons of radioactive water has been seeping into the Pacific from the plant for more than two years after the March 2011 earthquake and tsunami led to meltdowns at three of its reactors. Recent leaks from tanks storing radioactive water used to cool the reactors have added to fears that the amount of contaminated water is getting out of hand.
With Madrid's bid dogged by questions over Spain's economic crisis and Istanbul handicapped by political unrest and the civil war in neighboring Syria, Tokyo proved to be the least risky choice for the IOC.
"I think it was a choice between going to new shores and staying with a more traditional candidate," IOC vice president Thomas Bach said. "And this time they decided with the more traditional candidate."
IOC members have also been concerned about construction delays and other challenges plaguing preparations for the 2016 Olympics in Rio de Janeiro. Opting for certainty in 2020 was a key priority.
"I think very much that could have been a factor," Bach said.
Tokyo delegates in the hall screamed with joy, jumped in the air, hugged and waved small flags after Rogge opened a sealed envelope and read the words: "The International Olympic Committee has the honor of announcing that the games of the 32nd Olympiad in 2020 are awarded to the city of Tokyo."
Even though it was 5 a.m. Sunday in Japan, about 1,200 dignitaries and Olympic athletes who crowded into a convention hall in downtown Tokyo celebrated the news. Cheers of "Banzai!" filled the hall when the announcement was made.
"It's a great, great honor," Takeda said. "I promise we will deliver everything we've promised for 2020."
In Istanbul's old city, a groan went through a crowd of hundreds of people.
In the first round, Istanbul and Madrid tied with 26 votes each. Tokyo had 42 votes, six short of a winning a majority. Istanbul then beat Madrid 49-45 in a tiebreak to advance to the final, which Tokyo won easily.
In their final presentations, Madrid made its case as the least-expensive option and Istanbul spoke of the historic opportunity to bring the Olympics to a predominantly Muslim country for the first time.
Madrid, bidding for a third straight time, had seemed to have gained the most momentum in recent weeks despite Spain's economic crisis and 27 percent unemployment rate. The Madrid team claimed the games would pose no financial risk because most of the venues were already built.
The Turkish delegation pressed its case of taking the games to a city linking the continents of Europe and Asia.
With the civil war in Syria posing a major issue, Turkish Prime Minister Recep Tayyip Erdogan said taking the games to Turkey "will send a very meaningful and strong message, not only to the world, but to our broader region."
"At this critical moment, we would like to send a strong message of peace to the whole world from Istanbul," Erdogan said.
IOC member Prince Albert of Monaco asked what hosting the games in Turkey would mean to the wider region.
"We believe that hosting the Olympics in Istanbul will give this signal, this spirit of friendship and sharing and peace," Erdogan said. "And our country is a place where there is a lot of unity and diversity, and that is the idea that we can share on a broader scale with the Olympics Games being hosted in Turkey."
Madrid said 80 percent of its venues were ready and only $1.9 billion was needed for construction, a fraction of the other two bids.
"Madrid has perhaps the most reasonable and responsible financial foundation in recent Olympic history," Spanish Prime Minster Mariano Rajoy said. "We can host the Olympics in 2020 with no risk to the Olympic movement."
AP Sports Writers Stephen Wade and Tales Azzoni contributed to this report. Follow Stephen Wilson on Twitter: http://twitter.com/stevewilsonap