S. Morita has traveled the length of Japan to document Japan's beautifully stylized manhole covers.
The original purpose to put designs on the covers was to raise awareness for the costly sewage project. That was back in 1985. Since then the Japan Society of Manhole Covers (yes, that’s a thing) says that there are almost 6000, one-off, artistic manhole covers throughout the nation.
Shot Japan, and shot for the heads up thisiscolosal.
Look At 100s of Japan's Man Hole Covers