Animemes

Yeah, it looks very much like that picture, at least in any crowd I've seen. Japanese society is pretty uptight about visually standing out too much. It's all relegated to specific locations or events. Comiket is one example, because the many attending cosplayers are impossible to spot outside of the actual location (unless you count their luggage). Compared to similar events in europe, most of which are way smaller, you'll see extravagantly dressed people with bright hair colors in a large radius and on public transport.