Tokyo reported another 1,050 coronavirus infections Saturday, the highest daily number since Jan. 28, with the capital and three western prefectures under the country's third state of emergency since late last month.

The newest figure was slightly higher than the 1,027 cases reported Thursday, as Japanese authorities struggle to curb the resurgence of infections in Tokyo, with less than three months to go before the Olympics begin in the capital.

Due to the surge in infections, driven by the rapid spread of new variants of the virus, a state of emergency in Tokyo, as well as the three western prefectures of Osaka, Kyoto and Hyogo, took effect on Sunday.

Osaka confirmed on Saturday a record 1,262 daily cases and 41 COVID-19 deaths, the second-highest number.

The nationwide tally for the day of 5,986 cases was the highest since the previous state of emergency was fully lifted in late March.

The emergency through May 11, covering the Golden Week holiday period that started Thursday, entails stricter measures than before, including requiring restaurants serving alcohol to close, with fines for noncompliance.