Australia's state of Victoria will not host the 2026 Commonwealth Games due to projected cost overruns.
Nearly 80% of the Japanese public are now opposed to holding the Summer Games as scheduled this year, recent polls show.
Coates also hit out at the suggestion that the IOC was ploughing ahead with the Games "at all costs" to fulfill lucrative contracts with broadcasters and sponsors.
Here's what you need to know about the Tokyo Games
The International Olympic Committee (IOC) is working with sports bodies to arrange a July-August window for the postponed Tokyo Olympics in 2021 and hopes to confirm the schedule within a month, Japan's Yomiuri newspaper reported on Thursday. John Coates, the IOC's Coordination Commission chief for Tokyo, told the Yomiuri the Games would have to be held between the tennis Grand Slams of Wimbledon, slated to end in mid-July, and the US Open, which starts in late August.
'With one year to go, there is no clear picture of what shape the simplified Games will take. The situation with COVID-19, both domestically and internationally, is constantly changing.'
International Olympic Committee president Thomas Bach will visit Japan from July 12, ahead of the start of the Tokyo 2020 Olympic Games.
Coates, who spoke at a news conference at the end of the meeting, said that more than 80% of residents of the Olympic Village would be vaccinated ahead of July 23, when the Olympics start.
'But it could be a very different Games to what we're used to.'
The Tokyo Olympic games were postponed last year due to the pandemic. The showpiece event will be held from July 23 to August 8, 2021, while the Paralympics will take place from August 24 to September 5, 2021.
Brisbane becomes the third Australian city to get the Games after Melbourne in 1956 and Sydney in 2000.
'The IOC is actively working with its Japanese partners in the Tokyo 2020 Organising Committee and with the National Olympic Committees on the details of this policy (of flying in additional medical personnel)'
The IOC and Japanese government in March took the unprecedented decision to delay the Games, which had been due to start in July, for a year due to the coronavirus outbreak.
The Tokyo Olympics are not contingent on the development of a vaccine for the coronavirus, International Olympic Committee member John Coates said. Australian Coates, the head of the IOC's Coordination Commission for the Olympics, said JMA president Yoshitake Yokokura's comment was an 'opinion'.
Tokyo officials have said they intend to put on the Games in 2021 even if the pandemic has not eased substantially.
Simone Biles, the most decorated gymnast in world championship history, said she had returned to the gym this week after about seven or eight weeks away
The report comes after two members of the Ugandan Olympic delegation tested positive for the coronavirus last month upon arrival in Japan. One tested positive at Narita airport near Tokyo, but the remainder of the team was allowed to travel to a training site.
During his speech, he recalled the role of sport and the Olympic Games to build bridges, bring people together and shape the peace.
The new schedule means women's softball will kick off competition at 9 a.m. (0000 GMT) in Fukushima on July 21, two days before the Games officially open, with all events taking place a day earlier than the 2020 schedule.
Tokyo Governor Yuriko Koike said on Thursday that organisers were looking at ways to simplify the Games.
Japan has extended a state of emergency in Tokyo and three other areas until the end of May and is struggling to contain a surge in COVID-19 cases
The International Olympic Committee has been advised by the World Health Organization that there is no case for contingency plans to cancel or relocate the Tokyo 2020 Olympics over the coronavirus outbreak, the IOC's Coordination Commission head said on Friday.
The Olympics were due to begin on Friday with an extravagant opening ceremony in the National Stadium but the Games have instead been delayed until July 23, 2021 because of the global COVID-19 pandemic.
'I believe there will be some treatment (of coronavirus) by September or October this year. We (India) have to plan ourselves thinking that Olympics will be held.'
Australian consultancy firm SMAM, whose contract was terminated by the Delhi Commonwealth Games organisers for "non-performance", got the backing of top sports administrators here who said the company has been made a scapegoat in the corruption scandals that have rocked the event in India.
The head of a Japanese doctors' union warned on Tuesday that holding the Olympic Games in Tokyo this summer, with tens of thousands of people from around the world, could lead to the emergence of an "Olympic" strain of the coronavirus.
Seemingly unimpressed by tardy preparations for the 2010 Commonwealth Games in New Delhi, Australia's Olympic chief John Coates on Thursday said India will have to prepare in a better way if it aspires to host the Olympic Games in future.
Australian Olympic Committee (AOC) President John Coates on Thursday said India should never have been awarded the hosting rights of the Commonwealth Games given the shoddy preparations that have marred the build-up to the October 3 to 14 event.
A government spokesman said there was "no truth" to a report in Britain's Times newspaper that the government had privately concluded the Games would have to be cancelled.
Japan on Friday extended a state of emergency in Tokyo and other areas by about three weeks to June 20 as the COVID-19 pandemic shows no signs of easing less than two months before the Summer Olympics open.
Plans that had been almost a decade in the making were shredded as the COVID-19 pandemic forced the IOC and Japanese government to take the unprecedented decision to postpone the Olympics for a year.
Russia asks World Athletics to postpone decision on possible expulsion.
Olympics organisers must replan the Games without running up huge additional costs. IOC President Thomas Bach said his organisation faces several hundred million dollars in supplementary costs.
The International Olympic Commission will not change its decision to move the 2020 marathon to Sapporo to avoid the heat, a top Tokyo Olympics planning official said on Friday, despite pleas from Tokyo's governor to keep the race in the capital.
Former Australia cricket captain Steve Waugh will be the athlete liaison officer at the 2008 Beijing Games.
Senior international Olympics official John Coates said on Saturday the delayed Tokyo Olympics could end up being the greatest Games ever, coming next year as the world emerges from COVID-19 crisis. Coates, Australia's Olympic chief and head of the International Olympic Committee's inspectorate for the Games, cited the examples of positive Summer Games that followed the two world wars of the 20th century. The Tokyo Games were postponed for a year to 2021 in the aftermath of the new coronavirus outbreak.
The next challenge for Tokyo organisers is developing measures to help prevent a COVID-19 outbreak during the Games and how much the delay will cost Japanese taxpayers.
As an admirer of Japan for close to half a century, I care for Japan and expect Suga to respect the sentiment of his people and cancel the Olympics without further delay, says Rajaram Panda.
Australia's former rowing world champion and Olympic silver medallist Sarah Tait has died of cancer at the age of 33.
IOC stunned many Games organisers last month by announcing that the marathon, one of the most prestigious events at any Olympics, would be moved to the northern Japanese city of Sapporo to avoid the worst of Tokyo's summer heat.