That's a great resource. Thank you for sharing it here.

In a lot of ways, I think these manhole covers say a lot about Japan and Japanese culture. Just like all the uniforms and the traditional dolls like hina dolls and kabuto helmets, and even like the land-o-sell backpacks that all elementary schools students buy and where to school, this is a way to create specialty jobs, employ artisans, and keep money flowing through the economy. In addition, they add to the uniqueness and character of each area, which is something that I think is really valued over here.