Sharon, my first thought was that it did remind me of Manga art. In looking at some samples there seem to be some similarities in style.
Also, coincidentally, or not, it reminds me of "The Great Wave off Kanagawa", by Hokusai, with some of the dog's fur, especially around the collar area.
Some of your other graphic pieces do have a pop art look, almost like Peter Max, a few.
- I said "coincidentally", wondering if Japanese traditional art influenced modern Manga, but maybe that's a given?