Japan's Olympic minister said Tuesday the contract to hold the games only specifies the event has to be held during 2020.
Seiko Hashimoto's response to a question in the upper house of parliament implies the Olympics could be held later in the year and would not have to start on July 24 as planned.
The Tokyo Olympics are being threatened by a fast-spreading virus that has been blamed for 12 deaths in Japan and has shut down most sports competitions and Olympic-related events in the country.
"The IOC has the right to cancel the games only if they are not held during 2020," Hashimoto told parliament.
"This can be interpreted to mean the games can be postponed as long as they are held during the calendar year."