Photo/Illutration Visitors wait for Tokyo’s Ueno Zoo to finally reopen on June 4. The zoo had been closed since December. (Toshiyuki Hayashi)

Okinawa Prefecture said 183 patients tested positive for COVID-19 on June 6, the second highest for a Sunday, while Tokyo logged 351 cases.

The seven-day average of new cases in the nation's capital over the week through June 6 came to 426.4, down by 23.7 percent of the figure for the preceding week, metropolitan health officials said.

Patients deemed to be in serious condition and requiring ventilators or an extracorporeal membrane oxygenation (ECMO) device, which circulates blood through an artificial lung, stood at 60, down by two from the day before.

The number of new infections in Okinawa Prefecture was 88 fewer than a week ago, but the second highest for any Sunday in the southernmost prefecture.