Yes, the Coleus/Perilla discussion is a sidebar that developed. Nobody suggested the asked-about plant was Coleus or Perilla.
Frilly, that makes much more sense, shiso, which is reportedly a very exuberant volunteer in your zone. ; ) I never encountered any when I lived in OH, but if I had, I would have brought some home. Where I am, a Coleus sprout is pretty rare, even though I let them bloom and drop seeds all summer, and leave the dead plants in place for winter to decompose into the soil.
