Covid cases in Tokyo, Japan, hit third day of record-breaking numbers as Olympics play on

Japan has kept its cases and deaths lower than many other countries, but its seven-day rolling average is growing. Photo / AP

Japanese officials sounded the alarm today as Tokyo reported record-breaking coronavirus cases for the third straight day with the Olympics well underway.

"We have never experienced the expansion of the infections of this magnitude," Chief Cabinet Secretary Katsunobu Kato told reporters. He said the new cases were soaring not only in the Tokyo area but across the country.

Tokyo reported 3865 new cases Thursday, up from 3177 on Wednesday and double the numbers a week ago, setting an all-time high since the pandemic began early last year.

Japan has kept its cases and deaths lower than many other countries, but its seven-day rolling average is growing and now stands at 28 per 100,000 people nationwide and 88 in Tokyo, according to the Health Ministry. This compares to 18.5 in the United States, 48 in Britain and 2.8 in India, according to data from Johns Hopkins University.

"While almost nothing is helping to slow the infections, there are many factors that can accelerate them," said Dr. Shigeru Omi, a top government medical adviser, noting the Olympics and summer vacation.

"The biggest risk is the lack of a sense of crisis and without it, the infections will further expand and put medical systems under severe strain."

Tokyo has been under its fourth state of emergency since July 12, ahead of the Olympics, which began last Friday despite widespread public opposition and concern that the Games could worsen the outbreak.

An employee wearing a protective mask to help curb the spread of the coronavirus cleans the handrail of an escalator at a subway station. Photo / AP

People are still roaming the streets despite stay-at-home requests, making the measures largely ineffective at a time the more infectious Delta strain is spreading, he said.

"We have never seen the infections spread so rapidly."

Alarmed by the surge in Tokyo, the governors of three prefectures adjacent to the capital said they plan to ask Prime Minister Yoshihide Suga to place their areas under the state of emergency too.

Tokyo officials said Thursday that two foreign Olympic athletes are currently hospitalised and 38 others are self-isolating at designated hotels in the city.

Governor Yuriko Koike urged the organisers to make sure not to burden Tokyo's hospitals.

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She said the medical system was under severe stress, and noted that experts have projected cases in Tokyo could hit around 4500 a day by mid-August.

Japan's vaccine minister, Taro Kono, said in an interview with The Associated Press on Wednesday that there is no evidence of the coronavirus spreading from Olympic participants to the general public.

"I don't think there have been any cases related to the Olympic Games. So we aren't worried about that issue," he said.

Nationwide, Japan reported more than 9500 confirmed cases, a new record, on Wednesday for a total of about 892,000, with about 15,000 deaths.

As of Wednesday, 26.3 per cent of the Japanese population has been fully vaccinated. The percentage of the elderly who are fully vaccinated is 70 per cent, or 24.8 million people.

-AP