It has been a while since outcall adult service was legalized.

It used to be illegal called 'hotetoru' but was legalized politically.

Hotetoru offered soapland service including sex at a hotel illegally.

They put flyers into posts in apartments or on public phone boxes as an advertisement because they do not have real stores.

This advertisement has a bad influence on children, so there was always a conflict between local people and them.

Internet diffusion changed the environment.

They can build their websites and do not have to distribute erotic flyers anymore.

And cell phone makes their line of communication with customers easier.

So the government changes their political policy.
It is illegal to spread erotic flyers and commercial sex in Japan.

But it is legalized to put an advertisement on internet with a warning that it is allowed over 18 years old only.