The government will ask duty-free stores to check the date of entry to Japan in customers' passports and report if they were shopping during their required 14-day quarantine period, sources close to the matter said Friday.

The government will also ask the stores to provide digital purchase records of violators to the National Tax Agency to ensure travelers follow quarantine rules, as Tokyo grapples with a resurgence of COVID-19 just two weeks before the Tokyo Olympics open, the sources said.

All travelers to Japan are currently required to make a pledge to self-isolate for 14 days after entering the country, even if they test negative for the coronavirus upon arrival. Travelers from certain countries where highly contagious variants have spread are asked to stay in hotels or other accommodation for several days and take further tests as part of their 14-day quarantine.