Prime Minister Yoshihide Suga's government put Tokyo under its fourth COVID-19 state of emergency on Monday in an effort to contain a resurgence in coronavirus infections.

With the measure, to last until Aug. 22 — a period that will cover the duration of the Tokyo Olympics — the government aims to curb the movements of people during the global sports event, as well as the summer vacation period including Japan's Bon holiday in mid-August.

The Summer Games, which will open July 23 and end Aug. 8, will be held behind closed doors at almost all venues.