If you walk into a Japanese supermarket in the evening, you may notice small colored stickers appearing on bento boxes, prepared side dishes, and sushi trays, each marking the item down from its original price. In some stores, items may be marked down further later in the day if stock is still left. It looks like a system, and in a sense it is -- but it is not a nationwide schedule you can set your watch to. Short answer Many Japanese supermarkets mark down some prepared foods later in the day, as their selling window for that item gets ...