Tokyo confirmed 4,172 new cases of infection with the novel coronavirus on Sunday, exceeding 4,000 for the third consecutive day.
There were five seriously ill COVID-19 patients in the capital, up one from Saturday.
Osaka Prefecture logged a record 3,760 new cases on the day, setting a record for the second consecutive day.
The single-day figure in Hyogo Prefecture also hit a new record of 1,343 cases, exceeding the previous high of 1,191 reached on Saturday.
Okinawa Prefecture confirmed 1,226 new cases, down from the 1,533 reported a week ago.
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