TOKYO -- Signs of a hole in Japan's measures to lock down its borders against the coronavirus have been spotted in an unexpected place: a department store in downtown Tokyo's ritzy Ginza district.
An employee involved in analyzing customer data there began feeling a creeping sense of unease last fall. While looking at passport information from shoppers taking advantage of tax exemptions for non-residents, he noticed that some had come to the store not long after arriving in the country.
