Sixty-year-old Yashiro Haga is folding his Tokyo noodle ramen shop after 15 years in December, unable to overcome the prospect of a lasting customer slump due to the coronavirus crisis.

“The flow of people has changed due to the coronavirus,” Haga said, standing behind the counter of his ground-floor shop, Shirohachi. “Customers aren’t coming in and queuing up outside shops any longer.”...