"At this moment, the Tokyo 2020 committee, the IOC and Tokyo (city government) are doing their best to make sure the Games will be held from July 24," she added. The Tokyo
2020 is scheduled to take place from July 24 to August 9.
Hashimoto added that May looked like an "important benchmark" for deciding whether the Games go ahead as scheduled.
"An IOC member has said the end of May is the final deadline for making the decision," she said, referring to remarks by senior IOC member Dick Pound. "So I think the end of May is an important benchmark," Hashimoto added.
"We're making utmost efforts so that the IOC can be convinced that the Tokyo Games can be held safely."
The Japanese govt Prime Minister Shinzo Abe has stepped up national measures to contain the virus, urging schools nationwide to close for several weeks and calling on organisers of large events to consider cancelling or delaying them.
Japan cancels wheelchair rugby test event for the Paralympics
Everything from football matches and music concerts have been affected, while sumo's spring tournament will be held behind closed doors.
Moreover, on Tuesday, a wheelchair rugby test event for the Paralympics, which are scheduled to start on August 25, was cancelled over the virus.
"Tokyo 2020 nevertheless will carry out the wheelchair rugby test event in some form in April, after ensuring a safe and secure environment," an organising committee statement said.