When you go shopping in Japan you have the feeling that you can find any kind of product that can be unthinkable.
Toilet paper with drawings is a great example. It sure is a fun way to go to the bathroom looking funny drawings has printed, including popular characters.
While they may seems to be ridiculous, it is sort of entertaining especially for the kids. But ultimately, no matter what kind of designs they have, they will be flushed down the pipe eventually.