Thin Japanese noodles are called "soba." Soba noodles are made from buckwheat flour or a combination of buckwheat and wheat flour. They have a delicate and nutty flavor and are a popular staple in Japanese cuisine. Soba noodles can be served in various dishes, such as cold salads or hot noodle soups, and they are enjoyed both in casual meals and in more formal settings. In Japan, soba is often eaten as a nutritious and refreshing meal, especially during the hot summer months.