The word hentai is a portmanteau of the words "hen" and "shin". In Japan, the first use of the term hentai dates back to the Meiji era. The term was also used as a slang word. It was a term used for scholarship, and in the early days it was used to describe abnormal sexual fetishes. The artists of this type of art are highly appreciated because their creation reaches many people and their work is very popular all the time.