Antique Japanese Imari Porcelain PlateImari porcelain plate, likely Japanese due to the shade of blue used. Imari porcelain is named after the port of Imari, from which it was shipped starting in the 17th century. It is characterized by a color scheme of cobalt blue, red or orange, green, and gilt, often featuring exotic flowers or landscapes. The age of an Imari piece can sometimes be determined by a "NIPPON" mark on the bottom, often accompanied by a date and maker's name. However, Imari pieces are most commonly unmarked13.5 inches across