Japan reported 63 new coronavirus cases and seven new deaths on Thursday — the biggest one-day jump in infections since May 14.

Of the new cases on Thursday, 21 came from the southern city of Kitakyushu. The city had reported zero new infections for 23 days — then it saw its numbers spike again, raising fears that a second wave may be arriving. Kitakyushu has now reported 43 new cases in the past six days.

This raises the national total to 17,431 cases and 887 deaths, including the cases and deaths from the Princess Diamond cruise ship.