It is. In Japan!
A business operator may not make the representations that fall under any of the following items for the transaction of goods or services the business operator supplies:
a representation indicating that the quality, standard, or other content of the goods or services is significantly superior to that of the actual quality, standard, or content, or that contrary to the facts, the quality, standard, or other content is significantly superior to those of other business operators supplying the same type of or similar goods or services as those supplied by that business operator, to general customers, and is likely to unfairly induce customers and hinder the voluntary and rational choice-making by general consumers;
a representation that causes misunderstanding by general consumers that the prices of goods or services or other trade conditions are significantly more advantageous than the actual prices or other trade conditions, or those of other business operators supplying the same of or similar goods or services as those supplied by the relevant business operator, which are found likely to unfairly induce customers and hinder the voluntary and rational choice-making by general consumers; or-
beyond what is stated in the preceding two items, a representation for which matters relating to transactions of goods or services is likely to be misunderstood by general consumers, and is designated by the Prime Minister in finding that the representation is likely to unfairly induce customers and hinder voluntary and rational choice-making by general consumers.
We all have met OP’s mom, haven’t we?