We shouldn't need to tell you this is NSFW because these people are learning the myriad of uses that the 'F' word has, but we'll put it there just so you're doubly warned.

Chris Broad runs a site featuring life in Japan through the eyes of a Brit, featuring everything from learning Japanese, teaching Japanese people English, trying out local foods to the more bizarre aspects of Japanese life. So when a book to teach the Japanese people how to properly use the 'F' word (because it's obviously not taught when they're learning English) was released, Broad took it upon himself to educate the masses.

The result, for want of a better adjective, is f*cking hilarious.

Via Abroad In Japan/YouTube