Tokyo 2020 president Seiko Hashimoto is “100%” certain the Olympics will go ahead, but warned the Games “must be prepared” to proceed without spectators in the event of a coronavirus outbreak.
There are 50 days until the delayed Tokyo Games begin on July 23.
Japan is dealing with a fourth wave of coronavirus cases, with 10 areas of the country under a state of emergency.
No international fans will be permitted this summer at the Olympics or Paralympics, which begin on August 24.
A new wave of infections began in April in Japan, where some areas face restrictions until June 20.