The IOC plans to scale back the ceremony because athletes will not be allowed to arrive at the Olympic Village, which can accommodate 18,000 people, more than five days before they compete and must depart within two days after their event finishes, the paper reported citing unidentified sources.

Around 11,000 athletes from 200 countries had initially been expected at the opening ceremony, the Yomiuri said.

The latest surge in coronavirus infections in Japan and elsewhere has cast fresh doubts over the future of the Tokyo Olympics, which were delayed from last year. Any cancellation, or scaled back event could impose a financial burden on the IOC because it relies on income from selling television rights for the major sporting event. (Reporting by Tim Kelly; editing by Jonathan Oatis)