The tour guide said that it sold for the same price everywhere in Japan.

In Japan, the price at which a product is sold may differ from store to store. As a rule, you cannot return an item simply for personal reasons, saying that you found it cheaper in another store. But it is a special circumstance if the store had an agreement with the tour guide to explain the product, and you believed them when they said, “It’s the same price everywhere in Japan,” and they took you to the store where you bought the product. If you found out later that the guide’s explanation was incorrect, you are entitled to return it and get a refund. However, it must be true that the store had an agreement with the guide to explain the product, and you need to prove that what the guide said to get you to make the purchase was false.