Natt�? (�?��?��?��?� or �?豆, Natt�?) is a traditional Japanese food made from fermented soybeans, popular especially for breakfast. As a rich source of protein, natt�? and the soybean paste miso formed a vital source of nutrition in feudal Japan. For some, natt�? can be an acquired taste due to its powerful smell, strong flavor, and sticky consistency. In Japan natt�? is most popular in the eastern regions, including Kant�?, T�?hoku, and Hokkaido.