It was announced on the 17th that 321 new people were infected with the new coronavirus in Ibaraki prefecture.
This is 273 more than last Monday, a surge of more than six times.
It is the first time since August 27, last year that more than 300 people have been confirmed infected in a day.
On the other hand, the prefecture announced that the notification of the outbreak was withdrawn for the two infected persons announced on the 15th and 16th.
The total number of people confirmed to be infected in the prefecture is 26,262.