One thing that you don't see a whole lot of in Japan is graffiti (at least in comparison to similar sized cities in the US and Europe). I think it's a combination of less people doing it as well as better clean-up when it does occur. So I was a bit surprised when I came across this piece under a walkway on my walk this morning.
While a lot of people consider graffiti to be an art form (and there is some graffiti that I believe is well done), for the most part I think it's nothing more than an eyesore. It also costs a lot of taxpayer's money to clean it up which means the money isn't available for other things.