K-On! originally debuted as a manga, and it then went on to spawn an anime, a feature film, and a video game. It's a pretty popular series, so when it's copied, people tend to notice!

These image of popular anime K-On! has been making its way through the Japanese internet.

If something exists, then, yes, there is a dirty movie of it. Video games and anime exist, so, yes, there are dirty movies of them. Japan just seems to have more of them.

To help lift the spirits of Tohoku, Japan, the area hit by March 2011's earthquake and tsunami, illustrator Ninico Edomura created Zunko Tohoku. Named after zunda mochi rice cakes, she's a 17 year-old, who excels at archery. And she's copyright free.

Eek! Schoolgirl anime K-On!'s latest t-shirt looks more like some horrible moé monster, appearing in a dark dungeon in some Japanese role-playing game.

Yu Kobayashi, that's what. The Japanese voice actress, known for her twisted drawings, sets her sights on schoolgirl rocker anime K-On!. This is the result.

Schoolgirl rocker anime K-On! isn't only getting a feature film, in which the girls travel to London. It's also getting a convenience store. This is it.

Aki Toyosaki is 24 years-old. A big Grand Theft Auto fan, she works as a voice actress, voicing Yui Hirasawa in K-On as well as Cinque in the upcoming Final Fantasy Type-0. She's an adult, and she'd be free to live her life as an adult.

Japan loves trains. It also loves anime. What happens when you combine the two? Long lines and panties.

In Japan, convenience stores, or "conbini" as they're called, dot the landscape. They're where people buy food and drink, pay bills, send letters and stand and read magazines without paying for them. Some might like Family Mart, others prefer Daily Yamazaki. I like Lawson, because more than any other corner store in…

Aki Toyosaki is a voice actress and a pop singer, perhaps best known for schoolgirl rocker anime K-On! She's a gamer, too, and she's got discerning taste.

She won't be alone. Oh, no.

Senri Kawaguchi (in the pink shirt) is a 13-year-old junior high school student. But that's not all.

For an anime about schoolgirl rockers, one thing is more important than all others: the music. And animated series K-On!! has just that, good music.

In Japan, cars covered with stickers depicting anime and game characters are called itasha, or literally "painmobile". Bicycles covered in stickers are called itachari ("paincycle"). And jet skis?

If you follow anime, you probably know K-On!, which depicts the adventures of four Japanese schoolgirls in their high school music club. Here's the anime's opening theme song: