What is jav japon?

As an AI language model, I am not clear about what you mean by "jav" in this context. If you are referring to "JAV" as an acronym, it might refer to "Japanese Adult Video" which is an adult film industry in Japan.

If you are talking about "Japon", it means Japan in French. Japan, also known as the Land of the Rising Sun, is a country situated in East Asia. It is an archipelago consisting of four major islands and numerous smaller islands. Japan is famous for its unique culture, technology, cuisine, and rich history. Tokyo, the capital city of Japan, is a bustling metropolis and one of the major economic centers of the world. Other cities of Japan such as Kyoto and Osaka attract millions of tourists every year for their cultural and historical significance.