Photo/Illutration An elderly person is briefed on the next step after receiving a coronavirus vaccine at a mass vaccination center in Tokyo on May 24. (Pool)

Tokyo reported 684 new COVID-19 cases on May 27, down 159 from a week ago, and 11 new deaths, metropolitan health officials said.

The seven-day average of new cases in the capital through May 27 was 585, 83.1 percent of that of the preceding week.

The daily average of PCR tests conducted for Tokyo from May 24 to May 26 was 9,445.7

The number of serious cases--those requiring a ventilator or an extracorporeal membrane oxygenation (ECMO) device, which circulates blood through an artificial lung--was 69, down one from the previous day.

In Osaka Prefecture, 309 new cases were confirmed on May 27, raising the accumulated total to 98,985, officials said. There were 30 deaths from the virus the same day in the prefecture, raising the total to 2,247.