Torii

So here's a bit of Japanese culture for you that you probably don't know. No doubt you've all seen photos of the big, red gates at the front of shrines called torii (wiki), well the graffiti here is a representation of one of those. If you start to look around the grubbier parts of Tokyo you'll see these things painted on walls and fences all over the place. Why, you may ask? Well, if you have the problem of drunk salarymen relieving themselves on your wall or shopfront, you paint one of these in the problem area and problem solved because no one will dare to piss all over a shrine. Ingenious!