There has not been enough text about the store goodbye, anywhere. In France, you’re supposed to say goodbye when you walk out of a store. The owner expects it, people do it, it’s basic courtesy. The thinking, I suppose, is that you entered someone’s territory for a little bit, took the time to ruffle through their wares, maybe even bought something, and so there was a relationship, and you should acknowledge the relationship.

Japan operates the same way. You always at least say thank you, bow lightly, walk out. If you bought something, the owner may walk from behind the cashier desk with your merchandise, hand it to you, bow, and show you out, bowing again at the door. Sometimes they stand at the door and wave or bow as you walk down the street, so if you just went somewhere, you should absolutely turn around and check to make sure someone is literally leaning out of the doorway, waving to you, recognizing that you, text reader, are likely coming from several thousand miles away.