Japanese painters often sign thier paintings with a stamp. It is not a surprise. Japanese sign business documents with a stamp as well. I like it. It adds to the painting and seens less rough than scrawling my name.. A name can look like graffiti. I’m not the only one. James Whistler, an artist I admire, often signed his work with a butterfly like a Japanese stamp.
Lately I have use my familt crest, though I make a lot of stamps.