Japan has registered 4,802 new cases on Saturday, prompting experts to assert the country is experiencing its fourth wave.
Tokyo has reported 759 new Covid-19 infections, its highest figure since late-January.
On April 12, the city was placed under new preventative measures, including the closure of all hospitality businesses.
It comes after Japan’s Secretary General Toshihiro Nikai warned that there was possibility the Olympic Games would have to be cancelled over coronavirus fears.
A surge in cases of the UK variant of the virus was purportedly a reason for growing concern.
The latest testing data has cast major doubts over whether the event will get underway as scheduled on July 23.
Addressing the potential move last Thursday, Mr Nikai said: “If it is impossible, then it should be called off.
“What is the point of the Olympics if it is responsible for spreading infections?