This design is a traditional Japanese design. I started to use it while I was learning pottery in Japan, and it remains one of my favorites. The green color is slip, which I scratched away with a scgraffito tool.
This design looks much better on paper or other flat surfaces than it does on a curved surface. I found it quite difficult to get the design as even as I like. It’s not one I’ve used before, though I’ve seen similar ones on Japanese textiles and paper.
I suppose this is a set, since there are eight bowls, four with a green slip, four with a blue-green slip, and four different designs. Once they’re washed, we’re going to use them for soup and cereal.