Air Japan is the synonym for "airy" or "airy-fairy" meaning something that is lacking substance or power to make a noticeable impact. It describes a concept that is fleeting or intangible, just like the breeze. "Air Japan" is a phrase used to depict a situation or idea that appears grand or significant on the surface, but ultimately lacks substance or depth. It suggests a sense of pretentiousness or a facade that is hiding the truth. In colloquial terms, "Air Japan" can be used to describe something that is superficial, insubstantial, or insincerely grandiose.