Overnight, the International Olympic Committee also shifted its tone on the Games, saying it would step up planning for different scenarios, including postponement.
"We will postpone this and begin to deal with all the ramifications of moving this, which are enormous", Pound told Brennan.
"No one wants to see the Olympic Games postponed but as I have said publicly, we can not hold the event at all costs, certainly not at the cost of athlete safety", Coe said.
The United States governing bodies of swimming and track - two of the three top-tier Summer Games sports - had called on their national Olympic officials to push for a postponement.
Canada and Australia confirmed on Monday they would not be sending their athletes to Tokyo for their own safety, while the British and French governments urged the International Olympic Committee to make a quick decision. That statement sparked moves by both the Canadian and Australian Olympic committees to withdraw from the 2020 games. The games were scheduled to begin July 24 and end August 9 in Tokyo.
Earlier today, Japanese Prime Minister Shinzo Abe suggested that the events could be delayed, while adding that canceling them outright was "not an option". "We should not put the health of the athletes at risk in this battle we should be fighting together".
Callum Skinner, a 2016 Olympic cycling champion, tweeted: 'IOC president Thomas Bach's stubbornness and arrogance has spectacularly failed in this instance and he has weakened the Olympic movement'.
The IOC said the games will be held "not later than summer 2021" but will still be called the 2020 Tokyo Olympics.
As USA Today notes, this is the first time the Olympics have ever been suspended, though they have been canceled in wartime, including the 1916 Olympics during World War I, and the 1940 and 1944 Olympics during World War II.
The Tokyo Olympics and Paralympics have been postponed until 2021 amid the spread of the coronavirus COVID-19.
"In the balance of probabilities, the information known about conditions in Japan and the COVID-19′s effect on the rest of world clearly indicates the likelihood of postponement", Reedie said.