The expiration date is the approximate day by which the product will taste good if stored in an unopened state. It is different than "use-by" dates, which are deemed the last day the products can be safely consumed. Most products are scientifically considered safe to eat within a certain period after their expiration dates. Ogata tastes most of the products to check their quality. To ensure that customers understand what they are buying, he labels the products with expiration dates in large letters. He also confirms that the customer understands the expiration date before the product is passed through the cash register.