Japanese hentai (translates as ‘sexually perverted’) materials come in many different forms. The most popular type of hentai is manga (comics) which can be found in regular bookstores and newsstands across Japan. Following manga, hentai anime (animated cartoons) is the second most popular medium for sexually explicit publications and productions. For years these have been the most popular types of hentai, but recently there has been a new wrinkle in the type of hentai material, the development of online hentai flash games.