The daily number of new coronavirus cases reported in Tokyo on Sunday dropped to five, the lowest since the capital was placed under a state of emergency on April 7, and the sources of infection could be traced in all these cases, the metropolitan government said.

In another metropolitan area of Osaka Prefecture, no new case of infection was reported Sunday for the first time since March 9, the prefectural government said.

The two major areas have seen a declining trend in new infections recently, though the central government has come under fire for setting rigid testing guidelines and denying many potential COVID-19 patients access to tests.

(Training for a drive-through PCR test is under way during a media event at Tokyo's Chofu on May 16, 2020.)

The state of emergency remains in place for Tokyo, Osaka and six other prefectures, while that for the remaining 39 prefectures was lifted Thursday.

In Tokyo, which saw as many as 266 new cases on April 9, there have been 5,055 confirmed cases of coronavirus infection to date. On Sunday, seven patients died, bringing the total number of deaths in the capital to 237.

Tokyo Gov. Yuriko Koike said Friday the metropolitan government will start easing its stay-at-home measures if its targets are met, including fewer than 20 new daily infection cases on average in a week and a decline in the proportion of unknown transmission routes to under 50 percent.

As for Osaka, none of 310 people who took a viral test Sunday tested positive.

Osaka Prefecture in early May set its own guidelines for reopening businesses in stages and already lifted some of its restrictions on Saturday.

Throughout the country, 24 new cases were reported Sunday, dropping below 30 for the first time since March 16, though weekends and holidays typically see fewer tests carried out.

The total number of infections in Japan stood at 17,015, including about 700 from the Diamond Princess cruise ship that was quarantined near Tokyo in February, while there have been 769 deaths related to the coronavirus.

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