This is an exceptional quality Japanese porcelain dish, tray or plate, probably used for sushi or sauces. It is marked, and the closest that I can make out the mark is Nippon Imari and Arita-yaki from the early part of the 20th century. It has a leaf design with translucent glaze and lovely black, red and gold gilt accents. It is marked under the glaze. It measures 6.5 by 4 inches and is in great shape, no chips, no cracks and no crazing that I can see.