Wikipedia
Fakku (styled as FAKKU) is an English-language hentai website. The site attracts over 1 billion pageviews a month and over 9 million unique visitors. Fakku has more than 500,000 registered users who have made over 3 million posts.
At its core, Fakku is an aggregator that provides users with adult manga and doujinshi from Japan. Originally the content was uploaded exclusively by the sites administrators but later these privileges were shared with the community, allowing for translators to have their work seen by a much larger audience.
Fakku and its creator Jacob Grady have a known relationship with Danny Choo, Japanese TV personality and host of Culture Japan. At Anime Expo 2010, 2011, and 2012 (in Los Angeles, CA) Jacob and Danny hosted community meetups that attracted large audiences of fans and users.