Japanese Soup Noodles are a popular type of noodle dish in Japan. Udon is a thick wheat-flour noodle, while Ramen is a thin wheat-flour noodle. Both Udon and Ramen are served in a variety of soups, such as miso, soy sauce, and pork bone broth. They are often topped with vegetables, meats, and other ingredients. Udon and Ramen are both staples of Japanese cuisine and are enjoyed by people of all ages.