Many schools across the nation reopened Monday after summer vacations were shortened to allow students to catch up on classes missed when schools closed due to the novel coronavirus pandemic.

The shortest break decided by municipal authorities was only nine days. Usually, students in Japan take vacation in summer for more than a month.

Students wearing face masks started arriving at Ushioda Elementary School in Yokohama, near Tokyo, around 8 a.m. Their summer vacation had been shortened to roughly half its usual length.