In public places, more is better
Japanese arts are known for simplicity and minimalism. This does not translate to advertising.
One of the first things a person notices in Japan is the abundance of advertising in public places, especially in trains, at stations, and on the street. It is not necessarily limited to just major commercial districts; even residential areas are littered with pop-up banners and flyers.
The idea seems to be that if you’re in enough places, eventually someone will notice you. Content should be created with this in mind.