Japanese public information signs are nothing if not graphic.
Usually manga-style in conception, the plethora of signs in Japanese public spaces warn people to urinate properly, not allow their dogs to foul the sidewalks and to take their litter home with them.
Public information signs really got going in the Meiji Period (1868-1912) as the new government sought to inculcate "modern" norms of behaviour on a seemingly unwilling and uncaring populace.
The overwhelming incidence of public announcements and signs telling people not to do certain things in Japan points to the intrinsic nature of rebellion among a nation long-seen as blindly law-abiding by the rest of the world.
Yahoo Japan Auction Service
Japan Job Search
Rough Guide To Japan